iSharkFly-Docs
/
java-tutorials
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Move articles out of core-java-lang part 1 (#7908)

This commit is contained in:
Catalin Burcea 2019-10-03 07:02:53 +03:00 committed by Josh Cummings
parent aa88f134d3
commit 6cb034c1d8
82 changed files with 128 additions and 1250 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
core-java-modules/core-java-exceptions/README.md
View File

@ -1,8 +1,13 @@
## Relevant Articles:
## Core Java Exceptions
- [Will an Error Be Caught by Catch Block in Java?](https://www.baeldung.com/java-error-catch)
- [Java Global Exception Handler](http://www.baeldung.com/java-global-exception-handler)
- [Common Java Exceptions](http://www.baeldung.com/java-common-exceptions)
- [Throw Exception in Optional in Java 8](https://www.baeldung.com/java-optional-throw-exception)
- [How to Find an Exception’s Root Cause in Java](https://www.baeldung.com/java-exception-root-cause)
- [Java – Try with Resources](https://www.baeldung.com/java-try-with-resources)
This module contains articles about core java exceptions
### Relevant articles:
- [Chained Exceptions in Java](https://www.baeldung.com/java-chained-exceptions)
- [ClassNotFoundException vs NoClassDefFoundError](https://www.baeldung.com/java-classnotfoundexception-and-noclassdeffounderror)
- [Create a Custom Exception in Java](https://www.baeldung.com/java-new-custom-exception)
- [Exception Handling in Java](https://www.baeldung.com/java-exceptions)
- [Differences Between Final, Finally and Finalize in Java](https://www.baeldung.com/java-final-finally-finalize)
- [Difference Between Throw and Throws in Java](https://www.baeldung.com/java-throw-throws)
- [“Sneaky Throws” in Java](https://www.baeldung.com/java-sneaky-throws)
- [The StackOverflowError in Java](https://www.baeldung.com/java-stack-overflow-error)

91
core-java-modules/core-java-exceptions/pom.xml
View File

@ -1,55 +1,46 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung.exception.numberformat</groupId>
<artifactId>core-java-exceptions</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>core-java-exceptions</name>
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<groupId>com.baeldung.exceptions</groupId>
<modelVersion>4.0.0</modelVersion>
<artifactId>core-java-exceptions</artifactId>
<version>0.1.0-SNAPSHOT</version>
<name>core-java-exceptions</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-java</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../../parent-java</relativePath>
</parent>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-java</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../../parent-java</relativePath>
</parent>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-core</artifactId>
<version>${jmh-core.version}</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-generator-annprocess</artifactId>
<version>${jmh-generator-annprocess.version}</version>
</dependency>
<!-- test scoped -->
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${assertj-core.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<dependencies>
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>${javax.mail.version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<!-- test scoped -->
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${assertj-core.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<properties>
<commons-lang3.version>3.9</commons-lang3.version>
<jmh-core.version>1.19</jmh-core.version>
<assertj-core.version>3.10.0</assertj-core.version>
<jmh-generator-annprocess.version>1.19</jmh-generator-annprocess.version>
</properties>
<properties>
<javax.mail.version>1.5.0-b01</javax.mail.version>
<!-- testing -->
<assertj-core.version>3.10.0</assertj-core.version>
</properties>
</project>
</project>

20
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/Arithmetic.java
View File

@ -1,20 +0,0 @@
package com.baeldung.exceptions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Arithmetic {
private static Logger LOGGER = LoggerFactory.getLogger(Arithmetic.class);
public static void main(String[] args) {
try {
int result = 30 / 0; // Trying to divide by zero
} catch (ArithmeticException e) {
LOGGER.error("ArithmeticException caught!");
}
}
}

24
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/ArrayIndexOutOfBounds.java
View File

@ -1,24 +0,0 @@
package com.baeldung.exceptions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ArrayIndexOutOfBounds {
private static Logger LOGGER = LoggerFactory.getLogger(ArrayIndexOutOfBounds.class);
public static void main(String[] args) {
int[] nums = new int[] { 1, 2, 3 };
try {
int numFromNegativeIndex = nums[-1]; // Trying to access at negative index
int numFromGreaterIndex = nums[4]; // Trying to access at greater index
int numFromLengthIndex = nums[3]; // Trying to access at index equal to size of the array
} catch (ArrayIndexOutOfBoundsException e) {
LOGGER.error("ArrayIndexOutOfBoundsException caught");
}
}
}

43
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/CheckedUncheckedExceptions.java
View File

@ -1,43 +0,0 @@
package com.baeldung.exceptions;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
public class CheckedUncheckedExceptions {
public static void checkedExceptionWithThrows() throws FileNotFoundException {
File file = new File("not_existing_file.txt");
FileInputStream stream = new FileInputStream(file);
}
public static void checkedExceptionWithTryCatch() {
File file = new File("not_existing_file.txt");
try {
FileInputStream stream = new FileInputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
public static int divideByZero() {
int numerator = 1;
int denominator = 0;
return numerator / denominator;
}
public static void checkFile(String fileName) throws IncorrectFileNameException {
if (fileName == null || fileName.isEmpty()) {
throw new NullOrEmptyException("The filename is null.");
}
if (!isCorrectFileName(fileName)) {
throw new IncorrectFileNameException("Incorrect filename : " + fileName);
}
}
private static boolean isCorrectFileName(String fileName) {
if (fileName.equals("wrongFileName.txt"))
return false;
else
return true;
}
}

36
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/ClassCast.java
View File

@ -1,36 +0,0 @@
package com.baeldung.exceptions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
class Animal {
}
class Dog extends Animal {
}
class Lion extends Animal {
}
public class ClassCast {
private static Logger LOGGER = LoggerFactory.getLogger(ClassCast.class);
public static void main(String[] args) {
try {
Animal animalOne = new Dog(); // At runtime the instance is dog
Dog bruno = (Dog) animalOne; // Downcasting
Animal animalTwo = new Lion(); // At runtime the instance is animal
Dog tommy = (Dog) animalTwo; // Downcasting
} catch (ClassCastException e) {
LOGGER.error("ClassCastException caught!");
}
}
}

25
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/FileNotFound.java
View File

@ -1,25 +0,0 @@
package com.baeldung.exceptions;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class FileNotFound {
private static Logger LOGGER = LoggerFactory.getLogger(FileNotFound.class);
public static void main(String[] args) {
BufferedReader reader = null;
try {
reader = new BufferedReader(new FileReader(new File("/invalid/file/location")));
} catch (FileNotFoundException e) {
LOGGER.error("FileNotFoundException caught!");
}
}
}

28
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/GlobalExceptionHandler.java
View File

@ -1,28 +0,0 @@
package com.baeldung.exceptions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class GlobalExceptionHandler {
public static void main(String[] args) {
Handler globalExceptionHandler = new Handler();
Thread.setDefaultUncaughtExceptionHandler(globalExceptionHandler);
new GlobalExceptionHandler().performArithmeticOperation(10, 0);
}
public int performArithmeticOperation(int num1, int num2) {
return num1/num2;
}
}
class Handler implements Thread.UncaughtExceptionHandler {
private static Logger LOGGER = LoggerFactory.getLogger(Handler.class);
public void uncaughtException(Thread t, Throwable e) {
LOGGER.info("Unhandled exception caught!");
}
}

18
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/IllegalArgument.java
View File

@ -1,18 +0,0 @@
package com.baeldung.exceptions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class IllegalArgument {
private static Logger LOGGER = LoggerFactory.getLogger(IllegalArgument.class);
public static void main(String[] args) {
try {
Thread.sleep(-1000);
} catch (InterruptedException e) {
LOGGER.error("IllegalArgumentException caught!");
}
}
}

32
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/IllegalState.java
View File

@ -1,32 +0,0 @@
package com.baeldung.exceptions;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class IllegalState {
private static Logger LOGGER = LoggerFactory.getLogger(IllegalState.class);
public static void main(String[] args) {
List<Integer> intList = new ArrayList<>();
for (int i = 0; i < 10; i++) {
intList.add(i);
}
Iterator<Integer> intListIterator = intList.iterator(); // Initialized with index at -1
try {
intListIterator.remove(); // IllegalStateException
} catch (IllegalStateException e) {
LOGGER.error("IllegalStateException caught!");
}
}
}

13
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/IncorrectFileNameException.java
View File

@ -1,13 +0,0 @@
package com.baeldung.exceptions;
public class IncorrectFileNameException extends Exception {
private static final long serialVersionUID = 1L;
public IncorrectFileNameException(String errorMessage) {
super(errorMessage);
}
public IncorrectFileNameException(String errorMessage, Throwable thr) {
super(errorMessage, thr);
}
}

28
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/InterruptedExceptionExample.java
View File

@ -1,28 +0,0 @@
package com.baeldung.exceptions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
class ChildThread extends Thread {
private static Logger LOGGER = LoggerFactory.getLogger(ChildThread.class);
public void run() {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
LOGGER.error("InterruptedException caught!");
}
}
}
public class InterruptedExceptionExample {
public static void main(String[] args) throws InterruptedException {
ChildThread childThread = new ChildThread();
childThread.start();
childThread.interrupt();
}
}

25
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/MalformedURL.java
View File

@ -1,25 +0,0 @@
package com.baeldung.exceptions;
import java.net.MalformedURLException;
import java.net.URL;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class MalformedURL {
private static Logger LOGGER = LoggerFactory.getLogger(MalformedURL.class);
public static void main(String[] args) {
URL baeldungURL = null;
try {
baeldungURL = new URL("malformedurl");
} catch (MalformedURLException e) {
LOGGER.error("MalformedURLException caught!");
}
}
}

14
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/NullOrEmptyException.java
View File

@ -1,14 +0,0 @@
package com.baeldung.exceptions;
public class NullOrEmptyException extends RuntimeException {
private static final long serialVersionUID = 1L;
public NullOrEmptyException(String errorMessage) {
super(errorMessage);
}
public NullOrEmptyException(String errorMessage, Throwable thr) {
super(errorMessage, thr);
}
}

36
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/NullPointer.java
View File

@ -1,36 +0,0 @@
package com.baeldung.exceptions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class NullPointer {
private static Logger LOGGER = LoggerFactory.getLogger(NullPointer.class);
public static void main(String[] args) {
Person personObj = null;
try {
String name = personObj.personName; // Accessing the field of a null object
personObj.personName = "Jon Doe"; // Modifying the field of a null object
} catch (NullPointerException e) {
LOGGER.error("NullPointerException caught!");
}
}
}
class Person {
public String personName;
public String getPersonName() {
return personName;
}
public void setPersonName(String personName) {
this.personName = personName;
}
}

23
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/NumberFormat.java
View File

@ -1,23 +0,0 @@
package com.baeldung.exceptions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class NumberFormat {
private static Logger LOGGER = LoggerFactory.getLogger(NumberFormat.class);
public static void main(String[] args) {
String str1 = "100ABCD";
try {
int x = Integer.parseInt(str1); // Converting string with inappropriate format
int y = Integer.valueOf(str1);
} catch (NumberFormatException e) {
LOGGER.error("NumberFormatException caught!");
}
}
}

25
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/ParseExceptionExample.java
View File

@ -1,25 +0,0 @@
package com.baeldung.exceptions;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ParseExceptionExample {
private static Logger LOGGER = LoggerFactory.getLogger(ParseExceptionExample.class);
public static void main(String[] args) {
DateFormat format = new SimpleDateFormat("MM, dd, yyyy");
try {
format.parse("01, , 2010");
} catch (ParseException e) {
LOGGER.error("ParseException caught!");
}
}
}

98
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/RootCauseFinder.java
View File

@ -1,98 +0,0 @@
package com.baeldung.exceptions;
import java.time.LocalDate;
import java.time.Period;
import java.time.format.DateTimeParseException;
import java.util.Objects;
/**
* Utility class to find root cause exceptions.
*/
public class RootCauseFinder {
private RootCauseFinder() {
}
public static Throwable findCauseUsingPlainJava(Throwable throwable) {
Objects.requireNonNull(throwable);
Throwable rootCause = throwable;
while (rootCause.getCause() != null && rootCause.getCause() != rootCause) {
rootCause = rootCause.getCause();
}
return rootCause;
}
/**
* Calculates the age of a person from a given date.
*/
static class AgeCalculator {
private AgeCalculator() {
}
public static int calculateAge(String birthDate) {
if (birthDate == null || birthDate.isEmpty()) {
throw new IllegalArgumentException();
}
try {
return Period
.between(parseDate(birthDate), LocalDate.now())
.getYears();
} catch (DateParseException ex) {
throw new CalculationException(ex);
}
}
private static LocalDate parseDate(String birthDateAsString) {
LocalDate birthDate;
try {
birthDate = LocalDate.parse(birthDateAsString);
} catch (DateTimeParseException ex) {
throw new InvalidFormatException(birthDateAsString, ex);
}
if (birthDate.isAfter(LocalDate.now())) {
throw new DateOutOfRangeException(birthDateAsString);
}
return birthDate;
}
}
static class CalculationException extends RuntimeException {
CalculationException(DateParseException ex) {
super(ex);
}
}
static class DateParseException extends RuntimeException {
DateParseException(String input) {
super(input);
}
DateParseException(String input, Throwable thr) {
super(input, thr);
}
}
static class InvalidFormatException extends DateParseException {
InvalidFormatException(String input, Throwable thr) {
super("Invalid date format: " + input, thr);
}
}
static class DateOutOfRangeException extends DateParseException {
DateOutOfRangeException(String date) {
super("Date out of range: " + date);
}
}
}

30
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/StackTraceToString.java
View File

@ -1,30 +0,0 @@
package com.baeldung.exceptions;
import org.apache.commons.lang3.exception.ExceptionUtils;
import java.io.PrintWriter;
import java.io.StringWriter;
public class StackTraceToString {
public static void main(String[] args) {
// Convert a StackTrace to String using core java
try {
throw new NullPointerException();
} catch (Exception e) {
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
e.printStackTrace(pw);
System.out.println(sw.toString());
}
// Convert a StackTrace to String using Apache Commons
try {
throw new IndexOutOfBoundsException();
} catch (Exception e) {
System.out.println(ExceptionUtils.getStackTrace(e));
}
}
}

23
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/StringIndexOutOfBounds.java
View File

@ -1,23 +0,0 @@
package com.baeldung.exceptions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class StringIndexOutOfBounds {
private static Logger LOGGER = LoggerFactory.getLogger(StringIndexOutOfBounds.class);
public static void main(String[] args) {
String str = "Hello World";
try {
char charAtNegativeIndex = str.charAt(-1); // Trying to access at negative index
char charAtLengthIndex = str.charAt(11); // Trying to access at index equal to size of the string
} catch (StringIndexOutOfBoundsException e) {
LOGGER.error("StringIndexOutOfBoundsException caught");
}
}
}

10
core-java-modules/core-java-lang/src/main/java/com/baeldung/chainedexception/LogWithChain.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/chainedexception/LogWithChain.java
View File

@ -1,9 +1,9 @@
package com.baeldung.chainedexception;
package com.baeldung.exceptions.chainedexception;
import com.baeldung.chainedexception.exceptions.GirlFriendOfManagerUpsetException;
import com.baeldung.chainedexception.exceptions.ManagerUpsetException;
import com.baeldung.chainedexception.exceptions.NoLeaveGrantedException;
import com.baeldung.chainedexception.exceptions.TeamLeadUpsetException;
import com.baeldung.exceptions.chainedexception.exceptions.GirlFriendOfManagerUpsetException;
import com.baeldung.exceptions.chainedexception.exceptions.ManagerUpsetException;
import com.baeldung.exceptions.chainedexception.exceptions.NoLeaveGrantedException;
import com.baeldung.exceptions.chainedexception.exceptions.TeamLeadUpsetException;
public class LogWithChain {

10
core-java-modules/core-java-lang/src/main/java/com/baeldung/chainedexception/LogWithoutChain.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/chainedexception/LogWithoutChain.java
View File

@ -1,9 +1,9 @@
package com.baeldung.chainedexception;
package com.baeldung.exceptions.chainedexception;
import com.baeldung.chainedexception.exceptions.GirlFriendOfManagerUpsetException;
import com.baeldung.chainedexception.exceptions.ManagerUpsetException;
import com.baeldung.chainedexception.exceptions.NoLeaveGrantedException;
import com.baeldung.chainedexception.exceptions.TeamLeadUpsetException;
import com.baeldung.exceptions.chainedexception.exceptions.GirlFriendOfManagerUpsetException;
import com.baeldung.exceptions.chainedexception.exceptions.ManagerUpsetException;
import com.baeldung.exceptions.chainedexception.exceptions.NoLeaveGrantedException;
import com.baeldung.exceptions.chainedexception.exceptions.TeamLeadUpsetException;
public class LogWithoutChain {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/chainedexception/exceptions/GirlFriendOfManagerUpsetException.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/chainedexception/exceptions/GirlFriendOfManagerUpsetException.java
View File

@ -1,4 +1,4 @@
package com.baeldung.chainedexception.exceptions;
package com.baeldung.exceptions.chainedexception.exceptions;
public class GirlFriendOfManagerUpsetException extends Exception {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/chainedexception/exceptions/ManagerUpsetException.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/chainedexception/exceptions/ManagerUpsetException.java
View File

@ -1,4 +1,4 @@
package com.baeldung.chainedexception.exceptions;
package com.baeldung.exceptions.chainedexception.exceptions;
public class ManagerUpsetException extends Exception {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/chainedexception/exceptions/NoLeaveGrantedException.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/chainedexception/exceptions/NoLeaveGrantedException.java
View File

@ -1,4 +1,4 @@
package com.baeldung.chainedexception.exceptions;
package com.baeldung.exceptions.chainedexception.exceptions;
public class NoLeaveGrantedException extends Exception {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/chainedexception/exceptions/TeamLeadUpsetException.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/chainedexception/exceptions/TeamLeadUpsetException.java
View File

@ -1,4 +1,4 @@
package com.baeldung.chainedexception.exceptions;
package com.baeldung.exceptions.chainedexception.exceptions;
public class TeamLeadUpsetException extends Exception {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/customexception/FileManager.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/customexception/FileManager.java
View File

@ -1,4 +1,4 @@
package com.baeldung.customexception;
package com.baeldung.exceptions.customexception;
import java.io.File;
import java.io.FileNotFoundException;

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/customexception/IncorrectFileExtensionException.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/customexception/IncorrectFileExtensionException.java
View File

@ -1,4 +1,4 @@
package com.baeldung.customexception;
package com.baeldung.exceptions.customexception;
public class IncorrectFileExtensionException extends RuntimeException{
private static final long serialVersionUID = 1L;

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/customexception/IncorrectFileNameException.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/customexception/IncorrectFileNameException.java
View File

@ -1,4 +1,4 @@
package com.baeldung.customexception;
package com.baeldung.exceptions.customexception;
public class IncorrectFileNameException extends Exception {
private static final long serialVersionUID = 1L;

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/exceptionhandling/Exceptions.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/exceptionhandling/Exceptions.java
View File

@ -1,4 +1,4 @@
package com.baeldung.exceptionhandling;
package com.baeldung.exceptions.exceptionhandling;
import java.io.File;
import java.io.FileNotFoundException;

5
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/exceptionhandling/MyException.java Normal file
View File

@ -0,0 +1,5 @@
package com.baeldung.exceptions.exceptionhandling;
public class MyException extends Throwable {
}

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/exceptionhandling/Player.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/exceptionhandling/Player.java
View File

@ -1,4 +1,4 @@
package com.baeldung.exceptionhandling;
package com.baeldung.exceptions.exceptionhandling;
public class Player {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/exceptionhandling/PlayerLoadException.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/exceptionhandling/PlayerLoadException.java
View File

@ -1,4 +1,4 @@
package com.baeldung.exceptionhandling;
package com.baeldung.exceptions.exceptionhandling;
import java.io.IOException;

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/exceptionhandling/PlayerScoreException.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/exceptionhandling/PlayerScoreException.java
View File

@ -1,4 +1,4 @@
package com.baeldung.exceptionhandling;
package com.baeldung.exceptions.exceptionhandling;
public class PlayerScoreException extends Exception {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/exceptionhandling/TimeoutException.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/exceptionhandling/TimeoutException.java
View File

@ -1,4 +1,4 @@
package com.baeldung.exceptionhandling;
package com.baeldung.exceptions.exceptionhandling;
public class TimeoutException extends Exception {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/keywords/finalize/FinalizeObject.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/keywords/finalize/FinalizeObject.java
View File

@ -1,4 +1,4 @@
package com.baeldung.keywords.finalize;
package com.baeldung.exceptions.keywords.finalize;
public class FinalizeObject {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/keywords/finalkeyword/Child.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/keywords/finalkeyword/Child.java
View File

@ -1,4 +1,4 @@
package com.baeldung.keywords.finalkeyword;
package com.baeldung.exceptions.keywords.finalkeyword;
public final class Child extends Parent {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/keywords/finalkeyword/GrandChild.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/keywords/finalkeyword/GrandChild.java
View File

@ -1,4 +1,4 @@
package com.baeldung.keywords.finalkeyword;
package com.baeldung.exceptions.keywords.finalkeyword;
/*public class GrandChild extends Child {
// Compilation error

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/keywords/finalkeyword/Parent.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/keywords/finalkeyword/Parent.java
View File

@ -1,4 +1,4 @@
package com.baeldung.keywords.finalkeyword;
package com.baeldung.exceptions.keywords.finalkeyword;
public class Parent {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/keywords/finallykeyword/FinallyExample.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/keywords/finallykeyword/FinallyExample.java
View File

@ -1,4 +1,4 @@
package com.baeldung.keywords.finallykeyword;
package com.baeldung.exceptions.keywords.finallykeyword;
public class FinallyExample {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/noclassdeffounderror/ClassWithInitErrors.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/noclassdeffounderror/ClassWithInitErrors.java
View File

@ -1,4 +1,4 @@
package com.baeldung.noclassdeffounderror;
package com.baeldung.exceptions.noclassdeffounderror;
public class ClassWithInitErrors {
static int data = 1 / 0;

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/noclassdeffounderror/NoClassDefFoundErrorExample.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/noclassdeffounderror/NoClassDefFoundErrorExample.java
View File

@ -1,4 +1,4 @@
package com.baeldung.noclassdeffounderror;
package com.baeldung.exceptions.noclassdeffounderror;
public class NoClassDefFoundErrorExample {
public ClassWithInitErrors getClassWithInitErrors() {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/sneakythrows/SneakyRunnable.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/sneakythrows/SneakyRunnable.java
View File

@ -1,4 +1,4 @@
package com.baeldung.sneakythrows;
package com.baeldung.exceptions.sneakythrows;
import lombok.SneakyThrows;

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/sneakythrows/SneakyThrows.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/sneakythrows/SneakyThrows.java
View File

@ -1,4 +1,4 @@
package com.baeldung.sneakythrows;
package com.baeldung.exceptions.sneakythrows;
import java.io.IOException;

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/stackoverflowerror/AccountHolder.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/stackoverflowerror/AccountHolder.java
View File

@ -1,4 +1,4 @@
package com.baeldung.stackoverflowerror;
package com.baeldung.exceptions.stackoverflowerror;
public class AccountHolder {
private String firstName;

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/stackoverflowerror/ClassOne.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/stackoverflowerror/ClassOne.java
View File

@ -1,4 +1,4 @@
package com.baeldung.stackoverflowerror;
package com.baeldung.exceptions.stackoverflowerror;
public class ClassOne {
private int oneValue;

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/stackoverflowerror/ClassTwo.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/stackoverflowerror/ClassTwo.java
View File

@ -1,4 +1,4 @@
package com.baeldung.stackoverflowerror;
package com.baeldung.exceptions.stackoverflowerror;
public class ClassTwo {
private int twoValue;

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/stackoverflowerror/InfiniteRecursionWithTerminationCondition.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/stackoverflowerror/InfiniteRecursionWithTerminationCondition.java
View File

@ -1,4 +1,4 @@
package com.baeldung.stackoverflowerror;
package com.baeldung.exceptions.stackoverflowerror;
public class InfiniteRecursionWithTerminationCondition {
public int calculateFactorial(final int number) {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/stackoverflowerror/RecursionWithCorrectTerminationCondition.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/stackoverflowerror/RecursionWithCorrectTerminationCondition.java
View File

@ -1,4 +1,4 @@
package com.baeldung.stackoverflowerror;
package com.baeldung.exceptions.stackoverflowerror;
public class RecursionWithCorrectTerminationCondition {
public int calculateFactorial(final int number) {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/stackoverflowerror/UnintendedInfiniteRecursion.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/stackoverflowerror/UnintendedInfiniteRecursion.java
View File

@ -1,4 +1,4 @@
package com.baeldung.stackoverflowerror;
package com.baeldung.exceptions.stackoverflowerror;
public class UnintendedInfiniteRecursion {
public int calculateFactorial(int number) {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/throwsexception/DataAccessException.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/throwvsthrows/DataAccessException.java
View File

@ -1,4 +1,4 @@
package com.baeldung.throwsexception;
package com.baeldung.exceptions.throwvsthrows;
public class DataAccessException extends RuntimeException {

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/throwsexception/Main.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/throwvsthrows/Main.java
View File

@ -1,4 +1,4 @@
package com.baeldung.throwsexception;
package com.baeldung.exceptions.throwvsthrows;
import com.sun.mail.iap.ConnectionException;

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/throwsexception/PersonRepository.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/throwvsthrows/PersonRepository.java
View File

@ -1,4 +1,4 @@
package com.baeldung.throwsexception;
package com.baeldung.exceptions.throwvsthrows;
import java.sql.SQLException;
import java.util.List;

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/throwsexception/SimpleService.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/throwvsthrows/SimpleService.java
View File

@ -1,4 +1,4 @@
package com.baeldung.throwsexception;
package com.baeldung.exceptions.throwvsthrows;
import java.sql.SQLException;

2
core-java-modules/core-java-lang/src/main/java/com/baeldung/throwsexception/TryCatch.java → core-java-modules/core-java-exceptions/src/main/java/com/baeldung/exceptions/throwvsthrows/TryCatch.java
View File

@ -1,4 +1,4 @@
package com.baeldung.throwsexception;
package com.baeldung.exceptions.throwvsthrows;
import com.sun.mail.iap.ConnectionException;

9
core-java-modules/core-java-exceptions/src/main/java/com/baeldung/optional/PersonRepository.java
View File

@ -1,9 +0,0 @@
package com.baeldung.optional;
public class PersonRepository {
public String findNameById(String id) {
return id == null ? null : "Name";
}
}

25
core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exception/error/ErrorGeneratorUnitTest.java
View File

@ -1,25 +0,0 @@
package com.baeldung.exception.error;
import org.junit.Assert;
import org.junit.Test;
public class ErrorGeneratorUnitTest {
@Test(expected = AssertionError.class)
public void whenError_thenIsNotCaughtByCatchException() {
try {
throw new AssertionError();
} catch (Exception e) {
Assert.fail(); // errors are not caught by catch exception
}
}
@Test
public void whenError_thenIsCaughtByCatchError() {
try {
throw new AssertionError();
} catch (Error e) {
// caught! -> test pass
}
}
}

154
core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exception/numberformat/NumberFormatExceptionUnitTest.java
View File

@ -1,154 +0,0 @@
package com.baeldung.exception.numberformat;
import static org.junit.Assert.assertEquals;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.Locale;
import java.util.logging.Logger;
import org.junit.Test;
/**
* A set of examples tested to show cases where NumberFormatException is thrown and not thrown.
*/
public class NumberFormatExceptionUnitTest {
Logger LOG = Logger.getLogger(NumberFormatExceptionUnitTest.class.getName());
/* ---INTEGER FAIL CASES--- */
@Test(expected = NumberFormatException.class)
public void givenByteConstructor_whenAlphabetAsInput_thenFail() {
Byte byteInt = new Byte("one");
}
@Test(expected = NumberFormatException.class)
public void givenShortConstructor_whenSpaceInInput_thenFail() {
Short shortInt = new Short("2 ");
}
@Test(expected = NumberFormatException.class)
public void givenParseIntMethod_whenSpaceInInput_thenFail() {
Integer aIntPrim = Integer.parseInt("6000 ");
}
@Test(expected = NumberFormatException.class)
public void givenParseIntMethod_whenUnderscoreInInput_thenFail() {
int bIntPrim = Integer.parseInt("_6000");
}
@Test(expected = NumberFormatException.class)
public void givenIntegerValueOfMethod_whenCommaInInput_thenFail() {
Integer cIntPrim = Integer.valueOf("6,000");
}
@Test(expected = NumberFormatException.class)
public void givenBigIntegerConstructor_whenDecimalInInput_thenFail() {
BigInteger bigInteger = new BigInteger("4.0");
}
@Test(expected = NumberFormatException.class)
public void givenDecodeMethod_whenAlphabetInInput_thenFail() {
Long decodedLong = Long.decode("64403L");
}
/* ---INTEGER PASS CASES--- */
@Test
public void givenInvalidNumberInputs_whenOptimized_thenPass() {
Byte byteInt = new Byte("1");
assertEquals(1, byteInt.intValue());
Short shortInt = new Short("2 ".trim());
assertEquals(2, shortInt.intValue());
Integer aIntObj = Integer.valueOf("6");
assertEquals(6, aIntObj.intValue());
BigInteger bigInteger = new BigInteger("4");
assertEquals(4, bigInteger.intValue());
int aIntPrim = Integer.parseInt("6000 ".trim());
assertEquals(6000, aIntPrim);
int bIntPrim = Integer.parseInt("_6000".replaceAll("_", ""));
assertEquals(6000, bIntPrim);
int cIntPrim = Integer.parseInt("-6000");
assertEquals(-6000, cIntPrim);
Long decodeInteger = Long.decode("644032334");
assertEquals(644032334L, decodeInteger.longValue());
}
/* ---DOUBLE FAIL CASES--- */
@Test(expected = NumberFormatException.class)
public void givenFloatConstructor_whenAlphabetInInput_thenFail() {
Float floatDecimalObj = new Float("one.1");
}
@Test(expected = NumberFormatException.class)
public void givenDoubleConstructor_whenAlphabetInInput_thenFail() {
Double doubleDecimalObj = new Double("two.2");
}
@Test(expected = NumberFormatException.class)
public void givenBigDecimalConstructor_whenSpecialCharsInInput_thenFail() {
BigDecimal bigDecimalObj = new BigDecimal("3_0.3");
}
@Test(expected = NumberFormatException.class)
public void givenParseDoubleMethod_whenCommaInInput_thenFail() {
double aDoublePrim = Double.parseDouble("4000,1");
}
/* ---DOUBLE PASS CASES--- */
@Test
public void givenDoubleConstructor_whenDecimalInInput_thenPass() {
Double doubleDecimalObj = new Double("2.2");
assertEquals(2.2, doubleDecimalObj.doubleValue(), 0);
}
@Test
public void givenDoubleValueOfMethod_whenMinusInInput_thenPass() {
Double aDoubleObj = Double.valueOf("-6000");
assertEquals(-6000, aDoubleObj.doubleValue(), 0);
}
@Test
public void givenUsDecimalNumber_whenParsedWithNumberFormat_thenPass() throws ParseException {
Number parsedNumber = parseNumberWithLocale("4000.1", Locale.US);
assertEquals(4000.1, parsedNumber);
assertEquals(4000.1, parsedNumber.doubleValue(), 0);
assertEquals(4000, parsedNumber.intValue());
}
/**
* In most European countries (for example, France), comma is used as decimal in place of period.
* @throws ParseException if the input string contains special characters other than comma or decimal.
* In this test case, anything after decimal (period) is dropped when a European locale is set.
*/
@Test
public void givenEuDecimalNumberHasComma_whenParsedWithNumberFormat_thenPass() throws ParseException {
Number parsedNumber = parseNumberWithLocale("4000,1", Locale.FRANCE);
LOG.info("Number parsed is: " + parsedNumber);
assertEquals(4000.1, parsedNumber);
assertEquals(4000.1, parsedNumber.doubleValue(), 0);
assertEquals(4000, parsedNumber.intValue());
}
/**
* Converts a string into a number retaining all decimals, and symbols valid in a locale.
* @param number the input string for a number.
* @param locale the locale to consider while parsing a number.
* @return the generic number object which can represent multiple number types.
* @throws ParseException when input contains invalid characters.
*/
private Number parseNumberWithLocale(String number, Locale locale) throws ParseException {
locale = locale == null ? Locale.getDefault() : locale;
NumberFormat numberFormat = NumberFormat.getInstance(locale);
return numberFormat.parse(number);
}
}

55
core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/CheckedUncheckedExceptionsUnitTest.java
View File

@ -1,55 +0,0 @@
package com.baeldung.exceptions;
import static org.junit.jupiter.api.Assertions.assertThrows;
import java.io.FileNotFoundException;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
/**
* Tests the {@link CheckedUncheckedExceptions}.
*/
public class CheckedUncheckedExceptionsUnitTest {
@Test
public void whenFileNotExist_thenThrowException() {
assertThrows(FileNotFoundException.class, () -> {
CheckedUncheckedExceptions.checkedExceptionWithThrows();
});
}
@Test
public void whenTryCatchExcetpion_thenSuccess() {
try {
CheckedUncheckedExceptions.checkedExceptionWithTryCatch();
} catch (Exception e) {
Assertions.fail(e.getMessage());
}
}
@Test
public void whenDivideByZero_thenThrowException() {
assertThrows(ArithmeticException.class, () -> {
CheckedUncheckedExceptions.divideByZero();
});
}
@Test
public void whenInvalidFile_thenThrowException() {
assertThrows(IncorrectFileNameException.class, () -> {
CheckedUncheckedExceptions.checkFile("wrongFileName.txt");
});
}
@Test
public void whenNullOrEmptyFile_thenThrowException() {
assertThrows(NullOrEmptyException.class, () -> {
CheckedUncheckedExceptions.checkFile(null);
});
assertThrows(NullOrEmptyException.class, () -> {
CheckedUncheckedExceptions.checkFile("");
});
}
}

64
core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/GlobalExceptionHandlerUnitTest.java
View File

@ -1,64 +0,0 @@
package com.baeldung.exceptions;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.ArgumentCaptor;
import org.mockito.Captor;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnitRunner;
import org.slf4j.LoggerFactory;
import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.classic.spi.LoggingEvent;
import ch.qos.logback.core.Appender;
import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.Mockito.verify;
@RunWith(MockitoJUnitRunner.class)
public class GlobalExceptionHandlerUnitTest {
@Mock
private Appender<ILoggingEvent> mockAppender;
@Captor
private ArgumentCaptor<LoggingEvent> captorLoggingEvent;
@Before
public void setup() {
final Logger logger = (Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);
logger.addAppender(mockAppender);
Handler globalExceptionHandler = new Handler();
Thread.setDefaultUncaughtExceptionHandler(globalExceptionHandler);
}
@After
public void teardown() {
final Logger logger = (Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);
logger.detachAppender(mockAppender);
}
@Test
public void whenArithmeticException_thenUseUncaughtExceptionHandler() throws InterruptedException {
Thread globalExceptionHandlerThread = new Thread() {
public void run() {
GlobalExceptionHandler globalExceptionHandlerObj = new GlobalExceptionHandler();
globalExceptionHandlerObj.performArithmeticOperation(99, 0);
}
};
globalExceptionHandlerThread.start();
globalExceptionHandlerThread.join();
verify(mockAppender).doAppend(captorLoggingEvent.capture());
LoggingEvent loggingEvent = captorLoggingEvent.getValue();
assertThat(loggingEvent.getLevel()).isEqualTo(Level.INFO);
assertThat(loggingEvent.getFormattedMessage()).isEqualTo("Unhandled exception caught!");
}
}

114
core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/RootCauseFinderUnitTest.java
View File

@ -1,114 +0,0 @@
package com.baeldung.exceptions;
import com.google.common.base.Throwables;
import org.apache.commons.lang3.exception.ExceptionUtils;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import java.time.LocalDate;
import java.time.format.DateTimeParseException;
import java.time.temporal.ChronoUnit;
import static com.baeldung.exceptions.RootCauseFinder.*;
import static org.junit.jupiter.api.Assertions.assertTrue;
/**
* Tests the {@link RootCauseFinder}.
*/
public class RootCauseFinderUnitTest {
@Test
public void givenBirthDate_whenCalculatingAge_thenAgeReturned() {
try {
int age = AgeCalculator.calculateAge("1990-01-01");
Assertions.assertEquals(1990, LocalDate
.now()
.minus(age, ChronoUnit.YEARS)
.getYear());
} catch (CalculationException e) {
Assertions.fail(e.getMessage());
}
}
@Test
public void givenWrongFormatDate_whenFindingRootCauseUsingJava_thenRootCauseFound() {
try {
AgeCalculator.calculateAge("010102");
} catch (CalculationException ex) {
assertTrue(findCauseUsingPlainJava(ex) instanceof DateTimeParseException);
}
}
@Test
public void givenOutOfRangeDate_whenFindingRootCauseUsingJava_thenRootCauseFound() {
try {
AgeCalculator.calculateAge("2020-04-04");
} catch (CalculationException ex) {
assertTrue(findCauseUsingPlainJava(ex) instanceof DateOutOfRangeException);
}
}
@Test
public void givenNullDate_whenFindingRootCauseUsingJava_thenRootCauseFound() {
try {
AgeCalculator.calculateAge(null);
} catch (Exception ex) {
assertTrue(findCauseUsingPlainJava(ex) instanceof IllegalArgumentException);
}
}
@Test
public void givenWrongFormatDate_whenFindingRootCauseUsingApacheCommons_thenRootCauseFound() {
try {
AgeCalculator.calculateAge("010102");
} catch (CalculationException ex) {
assertTrue(ExceptionUtils.getRootCause(ex) instanceof DateTimeParseException);
}
}
@Test
public void givenOutOfRangeDate_whenFindingRootCauseUsingApacheCommons_thenRootCauseFound() {
try {
AgeCalculator.calculateAge("2020-04-04");
} catch (CalculationException ex) {
assertTrue(ExceptionUtils.getRootCause(ex) instanceof DateOutOfRangeException);
}
}
@Test
public void givenNullDate_whenFindingRootCauseUsingApacheCommons_thenRootCauseNotFound() {
try {
AgeCalculator.calculateAge(null);
} catch (Exception ex) {
assertTrue(ExceptionUtils.getRootCause(ex) instanceof IllegalArgumentException);
}
}
@Test
public void givenWrongFormatDate_whenFindingRootCauseUsingGuava_thenRootCauseFound() {
try {
AgeCalculator.calculateAge("010102");
} catch (CalculationException ex) {
assertTrue(Throwables.getRootCause(ex) instanceof DateTimeParseException);
}
}
@Test
public void givenOutOfRangeDate_whenFindingRootCauseUsingGuava_thenRootCauseFound() {
try {
AgeCalculator.calculateAge("2020-04-04");
} catch (CalculationException ex) {
assertTrue(Throwables.getRootCause(ex) instanceof DateOutOfRangeException);
}
}
@Test
public void givenNullDate_whenFindingRootCauseUsingGuava_thenRootCauseFound() {
try {
AgeCalculator.calculateAge(null);
} catch (Exception ex) {
assertTrue(Throwables.getRootCause(ex) instanceof IllegalArgumentException);
}
}
}

2
core-java-modules/core-java-lang/src/test/java/com/baeldung/classnotfoundexception/ClassNotFoundExceptionUnitTest.java → core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/classnotfoundexception/ClassNotFoundExceptionUnitTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.classnotfoundexception;
package com.baeldung.exceptions.classnotfoundexception;
import org.junit.Test;

2
core-java-modules/core-java-lang/src/test/java/com/baeldung/customexception/IncorrectFileExtensionExceptionUnitTest.java → core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/customexception/IncorrectFileExtensionExceptionUnitTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.customexception;
package com.baeldung.exceptions.customexception;
import static org.assertj.core.api.Assertions.assertThat;

2
core-java-modules/core-java-lang/src/test/java/com/baeldung/customexception/IncorrectFileNameExceptionUnitTest.java → core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/customexception/IncorrectFileNameExceptionUnitTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.customexception;
package com.baeldung.exceptions.customexception;
import static org.assertj.core.api.Assertions.assertThat;

2
core-java-modules/core-java-lang/src/test/java/com/baeldung/exceptionhandling/ExceptionsUnitTest.java → core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/exceptionhandling/ExceptionsUnitTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.exceptionhandling;
package com.baeldung.exceptions.exceptionhandling;
import org.junit.Test;

2
core-java-modules/core-java-lang/src/test/java/com/baeldung/noclassdeffounderror/NoClassDefFoundErrorUnitTest.java → core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/noclassdeffounderror/NoClassDefFoundErrorUnitTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.noclassdeffounderror;
package com.baeldung.exceptions.noclassdeffounderror;
import org.junit.Test;

2
core-java-modules/core-java-lang/src/test/java/com/baeldung/sneakythrows/SneakyRunnableUnitTest.java → core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/sneakythrows/SneakyRunnableUnitTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.sneakythrows;
package com.baeldung.exceptions.sneakythrows;
import org.junit.Test;

2
core-java-modules/core-java-lang/src/test/java/com/baeldung/sneakythrows/SneakyThrowsUnitTest.java → core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/sneakythrows/SneakyThrowsUnitTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.sneakythrows;
package com.baeldung.exceptions.sneakythrows;
import org.junit.Test;

2
core-java-modules/core-java-lang/src/test/java/com/baeldung/stackoverflowerror/AccountHolderManualTest.java → core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/stackoverflowerror/AccountHolderManualTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.stackoverflowerror;
package com.baeldung.exceptions.stackoverflowerror;
import org.junit.Test;

2
core-java-modules/core-java-lang/src/test/java/com/baeldung/stackoverflowerror/CyclicDependancyManualTest.java → core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/stackoverflowerror/CyclicDependancyManualTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.stackoverflowerror;
package com.baeldung.exceptions.stackoverflowerror;
import org.junit.Test;

2
core-java-modules/core-java-lang/src/test/java/com/baeldung/stackoverflowerror/InfiniteRecursionWithTerminationConditionManualTest.java → core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/stackoverflowerror/InfiniteRecursionWithTerminationConditionManualTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.stackoverflowerror;
package com.baeldung.exceptions.stackoverflowerror;
import org.junit.Test;

2
core-java-modules/core-java-lang/src/test/java/com/baeldung/stackoverflowerror/RecursionWithCorrectTerminationConditionManualTest.java → core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/stackoverflowerror/RecursionWithCorrectTerminationConditionManualTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.stackoverflowerror;
package com.baeldung.exceptions.stackoverflowerror;
import org.junit.Test;

2
core-java-modules/core-java-lang/src/test/java/com/baeldung/stackoverflowerror/UnintendedInfiniteRecursionManualTest.java → core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/stackoverflowerror/UnintendedInfiniteRecursionManualTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.stackoverflowerror;
package com.baeldung.exceptions.stackoverflowerror;
import org.junit.Test;

2
core-java-modules/core-java-lang/src/test/java/com/baeldung/throwsexception/SimpleServiceUnitTest.java → core-java-modules/core-java-exceptions/src/test/java/com/baeldung/exceptions/throwvsthrows/SimpleServiceUnitTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.throwsexception;
package com.baeldung.exceptions.throwvsthrows;
import org.junit.jupiter.api.Test;

92
core-java-modules/core-java-exceptions/src/test/java/com/baeldung/java8/JavaTryWithResourcesLongRunningUnitTest.java
View File

@ -1,92 +0,0 @@
package com.baeldung.java8;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Date;
import java.util.Scanner;
import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class JavaTryWithResourcesLongRunningUnitTest {
private static final Logger LOG = LoggerFactory.getLogger(JavaTryWithResourcesLongRunningUnitTest.class);
private static final String TEST_STRING_HELLO_WORLD = "Hello World";
private Date resource1Date, resource2Date;
// tests
/* Example for using Try_with_resources */
@Test
public void whenWritingToStringWriter_thenCorrectlyWritten() {
final StringWriter sw = new StringWriter();
try (PrintWriter pw = new PrintWriter(sw, true)) {
pw.print(TEST_STRING_HELLO_WORLD);
}
Assert.assertEquals(sw.getBuffer()
.toString(), TEST_STRING_HELLO_WORLD);
}
/* Example for using multiple resources */
@Test
public void givenStringToScanner_whenWritingToStringWriter_thenCorrectlyWritten() {
final StringWriter sw = new StringWriter();
try (Scanner sc = new Scanner(TEST_STRING_HELLO_WORLD); PrintWriter pw = new PrintWriter(sw, true)) {
while (sc.hasNext()) {
pw.print(sc.nextLine());
}
}
Assert.assertEquals(sw.getBuffer()
.toString(), TEST_STRING_HELLO_WORLD);
}
/* Example to show order in which the resources are closed */
@Test
public void whenFirstAutoClosableResourceIsinitializedFirst_thenFirstAutoClosableResourceIsReleasedFirst() throws Exception {
try (AutoCloseableResourcesFirst af = new AutoCloseableResourcesFirst(); AutoCloseableResourcesSecond as = new AutoCloseableResourcesSecond()) {
af.doSomething();
as.doSomething();
}
Assert.assertTrue(resource1Date.after(resource2Date));
}
class AutoCloseableResourcesFirst implements AutoCloseable {
public AutoCloseableResourcesFirst() {
LOG.debug("Constructor -> AutoCloseableResources_First");
}
public void doSomething() {
LOG.debug("Something -> AutoCloseableResources_First");
}
@Override
public void close() throws Exception {
LOG.debug("Closed AutoCloseableResources_First");
resource1Date = new Date();
}
}
class AutoCloseableResourcesSecond implements AutoCloseable {
public AutoCloseableResourcesSecond() {
LOG.debug("Constructor -> AutoCloseableResources_Second");
}
public void doSomething() {
LOG.debug("Something -> AutoCloseableResources_Second");
}
@Override
public void close() throws Exception {
LOG.debug("Closed AutoCloseableResources_Second");
resource2Date = new Date();
Thread.sleep(10000);
}
}
}

43
core-java-modules/core-java-exceptions/src/test/java/com/baeldung/optional/PersonRepositoryUnitTest.java
View File

@ -1,43 +0,0 @@
package com.baeldung.optional;
import org.junit.Test;
import java.util.Optional;
import static org.junit.jupiter.api.Assertions.assertAll;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
public class PersonRepositoryUnitTest {
PersonRepository personRepository = new PersonRepository();
@Test
public void whenIdIsNull_thenExceptionIsThrown() {
assertThrows(IllegalArgumentException.class,
() ->
Optional
.ofNullable(personRepository.findNameById(null))
.orElseThrow(IllegalArgumentException::new));
}
@Test
public void whenIdIsNonNull_thenNoExceptionIsThrown() {
assertAll(
() ->
Optional
.ofNullable(personRepository.findNameById("id"))
.orElseThrow(RuntimeException::new));
}
@Test
public void whenIdNonNull_thenReturnsNameUpperCase() {
String name = Optional
.ofNullable(personRepository.findNameById("id"))
.map(String::toUpperCase)
.orElseThrow(RuntimeException::new);
assertEquals("NAME", name);
}
}

0
core-java-modules/core-java-lang/src/test/resources/correctFileNameWithoutProperExtension → core-java-modules/core-java-exceptions/src/test/resources/correctFileNameWithoutProperExtension
View File

34
core-java-modules/core-java-lang/README.md
View File

@ -4,30 +4,22 @@
### Relevant Articles:
- [Generate equals() and hashCode() with Eclipse](http://www.baeldung.com/java-eclipse-equals-and-hashcode)
- [Chained Exceptions in Java](http://www.baeldung.com/java-chained-exceptions)
- [Iterating Over Enum Values in Java](http://www.baeldung.com/java-enum-iteration)
- [Java Double Brace Initialization](http://www.baeldung.com/java-double-brace-initialization)
- [Guide to the Diamond Operator in Java](http://www.baeldung.com/java-diamond-operator)
- [Comparator and Comparable in Java](http://www.baeldung.com/java-comparator-comparable)
- [The Java continue and break Keywords](http://www.baeldung.com/java-continue-and-break)
- [Nested Classes in Java](http://www.baeldung.com/java-nested-classes)
- [A Guide to Inner Interfaces in Java](http://www.baeldung.com/java-inner-interfaces)
- [Recursion In Java](http://www.baeldung.com/java-recursion)
- [A Guide to the finalize Method in Java](http://www.baeldung.com/java-finalize)
- [Infinite Loops in Java](http://www.baeldung.com/infinite-loops-java)
- [Quick Guide to java.lang.System](http://www.baeldung.com/java-lang-system)
- [Using Java Assertions](http://www.baeldung.com/java-assert)
- [ClassNotFoundException vs NoClassDefFoundError](http://www.baeldung.com/java-classnotfoundexception-and-noclassdeffounderror)
- [The StackOverflowError in Java](http://www.baeldung.com/java-stack-overflow-error)
- [Create a Custom Exception in Java](http://www.baeldung.com/java-new-custom-exception)
- [Exception Handling in Java](http://www.baeldung.com/java-exceptions)
- [Differences Between Final, Finally and Finalize in Java](https://www.baeldung.com/java-final-finally-finalize)
- [Generate equals() and hashCode() with Eclipse](https://www.baeldung.com/java-eclipse-equals-and-hashcode)
- [Iterating Over Enum Values in Java](https://www.baeldung.com/java-enum-iteration)
- [Java Double Brace Initialization](https://www.baeldung.com/java-double-brace-initialization)
- [Guide to the Diamond Operator in Java](https://www.baeldung.com/java-diamond-operator)
- [Comparator and Comparable in Java](https://www.baeldung.com/java-comparator-comparable)
- [The Java continue and break Keywords](https://www.baeldung.com/java-continue-and-break)
- [Nested Classes in Java](https://www.baeldung.com/java-nested-classes)
- [A Guide to Inner Interfaces in Java](https://www.baeldung.com/java-inner-interfaces)
- [Recursion In Java](https://www.baeldung.com/java-recursion)
- [A Guide to the finalize Method in Java](https://www.baeldung.com/java-finalize)
- [Infinite Loops in Java](https://www.baeldung.com/infinite-loops-java)
- [Quick Guide to java.lang.System](https://www.baeldung.com/java-lang-system)
- [Using Java Assertions](https://www.baeldung.com/java-assert)
- [Static and Dynamic Binding in Java](https://www.baeldung.com/java-static-dynamic-binding)
- [Difference Between Throw and Throws in Java](https://www.baeldung.com/java-throw-throws)
- [Synthetic Constructs in Java](https://www.baeldung.com/java-synthetic)
- [How to Separate Double into Integer and Decimal Parts](https://www.baeldung.com/java-separate-double-into-integer-decimal-parts)
- [“Sneaky Throws” in Java](http://www.baeldung.com/java-sneaky-throws)
- [Retrieving a Class Name in Java](https://www.baeldung.com/java-class-name)
- [Java Compound Operators](https://www.baeldung.com/java-compound-operators)
- [Guide to Java Packages](https://www.baeldung.com/java-packages)

14
core-java-modules/core-java-lang/pom.xml
View File

@ -43,12 +43,6 @@
<artifactId>log4j-over-slf4j</artifactId>
<version>${org.slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<!-- test scoped -->
<dependency>
<groupId>org.assertj</groupId>
@ -56,11 +50,6 @@
<version>${assertj-core.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>${javax.mail.version}</version>
</dependency>
</dependencies>
<build>
@ -75,9 +64,6 @@
<properties>
<gson.version>2.8.2</gson.version>
<javax.mail.version>1.5.0-b01</javax.mail.version>
<!-- testing -->
<assertj-core.version>3.10.0</assertj-core.version>
</properties>

5
core-java-modules/core-java-lang/src/main/java/com/baeldung/exceptionhandling/MyException.java
View File

@ -1,5 +0,0 @@
package com.baeldung.exceptionhandling;
public class MyException extends Throwable {
}

1
core-java-modules/pom.xml
View File

@ -15,7 +15,6 @@
<modules>
<module>pre-jpms</module>
<module>core-java-exceptions</module>
<module>core-java-optional</module>
<module>core-java-lang-operators</module>
<module>core-java-networking-2</module>

2
pom.xml
View File

@ -415,6 +415,7 @@
<module>core-java-modules/core-java-io-files</module>
<module>core-java-modules/core-java-nio</module>
<module>core-java-modules/core-java-security</module>
<module>core-java-modules/core-java-exceptions</module>
<module>core-java-modules/core-java-lang-syntax</module>
<module>core-java-modules/core-java-lang-syntax-2</module>
<module>core-java-modules/core-java-lang</module>
@ -1162,6 +1163,7 @@
<module>core-java-modules/core-java-io-files</module>
<module>core-java-modules/core-java-nio</module>
<module>core-java-modules/core-java-security</module>
<module>core-java-modules/core-java-exceptions</module>
<module>core-java-modules/core-java-lang-syntax</module>
<module>core-java-modules/core-java-lang-syntax-2</module>
<module>core-java-modules/core-java-lang</module>