diff --git a/algorithms/README.md b/algorithms/README.md index 9d347869bd..b9a37a7bf2 100644 --- a/algorithms/README.md +++ b/algorithms/README.md @@ -31,3 +31,6 @@ - [Round Up to the Nearest Hundred](https://www.baeldung.com/java-round-up-nearest-hundred) - [Merge Sort in Java](https://www.baeldung.com/java-merge-sort) - [Calculate Percentage in Java](https://www.baeldung.com/java-calculate-percentage) +- [Quicksort Algorithm Implementation in Java](https://www.baeldung.com/java-quicksort) +- [Insertion Sort in Java](https://www.baeldung.com/java-insertion-sort) +- [Converting Between Byte Arrays and Hexadecimal Strings in Java](https://www.baeldung.com/java-byte-arrays-hex-strings) diff --git a/apache-geode/README.md b/apache-geode/README.md new file mode 100644 index 0000000000..2f04418825 --- /dev/null +++ b/apache-geode/README.md @@ -0,0 +1,3 @@ +### Relevant Articles: + +- [A Quick Guide to Apache Geode](https://www.baeldung.com/apache-geode) diff --git a/core-java-collections/README.md b/core-java-collections/README.md index 684beda281..d0aaaa7182 100644 --- a/core-java-collections/README.md +++ b/core-java-collections/README.md @@ -38,3 +38,4 @@ - [Time Complexity of Java Collections](https://www.baeldung.com/java-collections-complexity) - [Operating on and Removing an Item from Stream](https://www.baeldung.com/java-use-remove-item-stream) - [An Introduction to Synchronized Java Collections](https://www.baeldung.com/java-synchronized-collections) +- [Guide to EnumSet](https://www.baeldung.com/java-enumset) diff --git a/core-java-io/README.md b/core-java-io/README.md index 58e331b6fc..ae4c267b8a 100644 --- a/core-java-io/README.md +++ b/core-java-io/README.md @@ -31,4 +31,5 @@ - [Create a Symbolic Link with Java](http://www.baeldung.com/java-symlink) - [Quick Use of FilenameFilter](http://www.baeldung.com/java-filename-filter) - [Initialize a HashMap in Java](https://www.baeldung.com/java-initialize-hashmap) -- [ Read a File into an ArrayList](https://www.baeldung.com/java-file-to-arraylist) +- [Read a File into an ArrayList](https://www.baeldung.com/java-file-to-arraylist) +- [Guide to Java OutputStream](https://www.baeldung.com/java-outputstream) diff --git a/core-java-io/pom.xml b/core-java-io/pom.xml index cf3e950cb8..efa32b8e3e 100644 --- a/core-java-io/pom.xml +++ b/core-java-io/pom.xml @@ -154,6 +154,12 @@ async-http-client ${async-http-client.version} + + com.opencsv + opencsv + ${opencsv.version} + test + @@ -247,7 +253,7 @@ 1.13 0.6.5 0.9.0 - + 4.1 3.6.1 1.7.0 diff --git a/core-java-io/src/test/java/com/baeldung/csv/ReadCSVInArrayUnitTest.java b/core-java-io/src/test/java/com/baeldung/csv/ReadCSVInArrayUnitTest.java new file mode 100644 index 0000000000..2593eee82b --- /dev/null +++ b/core-java-io/src/test/java/com/baeldung/csv/ReadCSVInArrayUnitTest.java @@ -0,0 +1,106 @@ +package com.baeldung.csv; + +import java.io.BufferedReader; +import java.io.File; +import java.io.FileNotFoundException; +import java.io.FileReader; +import java.io.IOException; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.List; +import java.util.Scanner; + +import org.junit.Assert; +import org.junit.Test; + +import com.opencsv.CSVReader; + +public class ReadCSVInArrayUnitTest { + public static final String COMMA_DELIMITER = ","; + public static final String CSV_FILE = "src/test/resources/book.csv"; + public static final List> EXPECTED_ARRAY = Collections.unmodifiableList(new ArrayList>() { + { + add(new ArrayList() { + { + add("Mary Kom"); + add("Unbreakable"); + } + }); + add(new ArrayList() { + { + add("Kapil Isapuari"); + add("Farishta"); + } + }); + } + }); + + @Test + public void givenCSVFile_whenBufferedReader_thenContentsAsExpected() throws IOException { + List> records = new ArrayList>(); + try (BufferedReader br = new BufferedReader(new FileReader(CSV_FILE))) { + String line = ""; + while ((line = br.readLine()) != null) { + String[] values = line.split(COMMA_DELIMITER); + records.add(Arrays.asList(values)); + } + } catch (Exception e) { + e.printStackTrace(); + } + for (int i = 0; i < EXPECTED_ARRAY.size(); i++) { + Assert.assertArrayEquals(EXPECTED_ARRAY.get(i) + .toArray(), + records.get(i) + .toArray()); + } + } + + @Test + public void givenCSVFile_whenScanner_thenContentsAsExpected() throws IOException { + List> records = new ArrayList>(); + try (Scanner scanner = new Scanner(new File(CSV_FILE));) { + while (scanner.hasNextLine()) { + records.add(getRecordFromLine(scanner.nextLine())); + } + } catch (FileNotFoundException e) { + e.printStackTrace(); + } + for (int i = 0; i < EXPECTED_ARRAY.size(); i++) { + Assert.assertArrayEquals(EXPECTED_ARRAY.get(i) + .toArray(), + records.get(i) + .toArray()); + } + } + + private List getRecordFromLine(String line) { + List values = new ArrayList(); + try (Scanner rowScanner = new Scanner(line)) { + rowScanner.useDelimiter(COMMA_DELIMITER); + while (rowScanner.hasNext()) { + values.add(rowScanner.next()); + } + } + return values; + } + + @Test + public void givenCSVFile_whenOpencsv_thenContentsAsExpected() throws IOException { + List> records = new ArrayList>(); + try (CSVReader csvReader = new CSVReader(new FileReader(CSV_FILE));) { + String[] values = null; + while ((values = csvReader.readNext()) != null) { + records.add(Arrays.asList(values)); + } + } catch (Exception e) { + e.printStackTrace(); + } + for (int i = 0; i < EXPECTED_ARRAY.size(); i++) { + Assert.assertArrayEquals(EXPECTED_ARRAY.get(i) + .toArray(), + records.get(i) + .toArray()); + } + } +} diff --git a/core-java-io/src/test/resources/book.csv b/core-java-io/src/test/resources/book.csv new file mode 100644 index 0000000000..b7c4b80499 --- /dev/null +++ b/core-java-io/src/test/resources/book.csv @@ -0,0 +1,2 @@ +Mary Kom,Unbreakable +Kapil Isapuari,Farishta \ No newline at end of file diff --git a/core-java/README.md b/core-java/README.md index 1cbbfe2b39..59aab91aa9 100644 --- a/core-java/README.md +++ b/core-java/README.md @@ -157,3 +157,4 @@ - [Hashing a Password in Java](https://www.baeldung.com/java-password-hashing) - [Java Switch Statement](https://www.baeldung.com/java-switch) - [The Modulo Operator in Java](https://www.baeldung.com/modulo-java) +- [Ternary Operator In Java](https://www.baeldung.com/java-ternary-operator) diff --git a/core-java/src/main/java/com/baeldung/string/DoubleToString.java b/core-java/src/main/java/com/baeldung/string/DoubleToString.java new file mode 100644 index 0000000000..d26d26f3df --- /dev/null +++ b/core-java/src/main/java/com/baeldung/string/DoubleToString.java @@ -0,0 +1,41 @@ +package com.baeldung.string; + +import java.math.RoundingMode; +import java.text.DecimalFormat; +import java.text.NumberFormat; + +public class DoubleToString { + + public static String truncateByCast(double d) { + return String.valueOf((int) d); + } + + public static String roundWithStringFormat(double d) { + return String.format("%.0f", d); + } + + public static String truncateWithNumberFormat(double d) { + NumberFormat nf = NumberFormat.getInstance(); + nf.setMaximumFractionDigits(0); + nf.setRoundingMode(RoundingMode.FLOOR); + return nf.format(d); + } + + public static String roundWithNumberFormat(double d) { + NumberFormat nf = NumberFormat.getInstance(); + nf.setMaximumFractionDigits(0); + return nf.format(d); + } + + public static String truncateWithDecimalFormat(double d) { + DecimalFormat df = new DecimalFormat("#,###"); + df.setRoundingMode(RoundingMode.FLOOR); + return df.format(d); + } + + public static String roundWithDecimalFormat(double d) { + DecimalFormat df = new DecimalFormat("#,###"); + return df.format(d); + } + +} diff --git a/core-java/src/test/java/com/baeldung/string/DoubleToStringUnitTest.java b/core-java/src/test/java/com/baeldung/string/DoubleToStringUnitTest.java new file mode 100644 index 0000000000..5212d7aa1a --- /dev/null +++ b/core-java/src/test/java/com/baeldung/string/DoubleToStringUnitTest.java @@ -0,0 +1,45 @@ +package com.baeldung.string; + +import static org.assertj.core.api.Assertions.assertThat; + +import org.junit.Test; + +public class DoubleToStringUnitTest { + + private static final double DOUBLE_VALUE = 3.56; + private static final String TRUNCATED_DOUBLE = "3"; + private static final String ROUNDED_UP_DOUBLE = "4"; + + + @Test + public void truncateByCastTest() { + assertThat(DoubleToString.truncateByCast(DOUBLE_VALUE)).isEqualTo(TRUNCATED_DOUBLE); + } + + @Test + public void roundingWithStringFormatTest() { + assertThat(DoubleToString.roundWithStringFormat(DOUBLE_VALUE)).isEqualTo(ROUNDED_UP_DOUBLE); + } + + @Test + public void truncateWithNumberFormatTest() { + assertThat(DoubleToString.truncateWithNumberFormat(DOUBLE_VALUE)).isEqualTo(TRUNCATED_DOUBLE); + } + + @Test + public void roundWithNumberFormatTest() { + assertThat(DoubleToString.roundWithNumberFormat(DOUBLE_VALUE)).isEqualTo(ROUNDED_UP_DOUBLE); + } + + @Test + public void truncateWithDecimalFormatTest() { + assertThat(DoubleToString.truncateWithDecimalFormat(DOUBLE_VALUE)).isEqualTo(TRUNCATED_DOUBLE); + } + + @Test + public void roundWithDecimalFormatTest() { + assertThat(DoubleToString.roundWithDecimalFormat(DOUBLE_VALUE)).isEqualTo(ROUNDED_UP_DOUBLE); + } + + +} diff --git a/core-kotlin/README.md b/core-kotlin/README.md index 523f5b6e78..9906b59a93 100644 --- a/core-kotlin/README.md +++ b/core-kotlin/README.md @@ -39,3 +39,4 @@ - [Introduction to Kovenant Library for Kotlin](https://www.baeldung.com/kotlin-kovenant) - [Converting Kotlin Data Class from JSON using GSON](https://www.baeldung.com/kotlin-json-convert-data-class) - [Concatenate Strings in Kotlin](https://www.baeldung.com/kotlin-concatenate-strings) +- [Kotlin return, break, continue Keywords](https://www.baeldung.com/kotlin-return-break-continue) diff --git a/hibernate5/README.md b/hibernate5/README.md index fbf46eed50..7f52531076 100644 --- a/hibernate5/README.md +++ b/hibernate5/README.md @@ -17,3 +17,4 @@ - [Mapping A Hibernate Query to a Custom Class](https://www.baeldung.com/hibernate-query-to-custom-class) - [@JoinColumn Annotation Explained](https://www.baeldung.com/jpa-join-column) - [Hibernate 5 Naming Strategy Configuration](https://www.baeldung.com/hibernate-naming-strategy) +- [Proxy in Hibernate load() Method](https://www.baeldung.com/hibernate-proxy-load-method) diff --git a/java-collections-maps/README.md b/java-collections-maps/README.md index ca7fee1d21..a6037a3c57 100644 --- a/java-collections-maps/README.md +++ b/java-collections-maps/README.md @@ -16,3 +16,4 @@ - [Sort a HashMap in Java](https://www.baeldung.com/java-hashmap-sort) - [Finding the Highest Value in a Java Map](https://www.baeldung.com/java-find-map-max) - [Merging Two Maps with Java 8](https://www.baeldung.com/java-merge-maps) +- [How to Check If a Key Exists in a Map](https://www.baeldung.com/java-map-key-exists) diff --git a/java-dates/README.md b/java-dates/README.md index 54843f90ee..f99bfeb861 100644 --- a/java-dates/README.md +++ b/java-dates/README.md @@ -21,4 +21,5 @@ - [How to Get the Start and the End of a Day using Java](http://www.baeldung.com/java-day-start-end) - [Calculate Age in Java](http://www.baeldung.com/java-get-age) - [Increment Date in Java](http://www.baeldung.com/java-increment-date) -- [Add Hours To a Date In Java](http://www.baeldung.com/java-add-hours-date) \ No newline at end of file +- [Add Hours To a Date In Java](http://www.baeldung.com/java-add-hours-date) +- [Guide to DateTimeFormatter](https://www.baeldung.com/java-datetimeformatter) diff --git a/java-numbers/README.md b/java-numbers/README.md index 6d6a279cc9..1138d9a74c 100644 --- a/java-numbers/README.md +++ b/java-numbers/README.md @@ -12,3 +12,4 @@ - [BigDecimal and BigInteger in Java](http://www.baeldung.com/java-bigdecimal-biginteger) - [Find All Pairs of Numbers in an Array That Add Up to a Given Sum](http://www.baeldung.com/java-algorithm-number-pairs-sum) - [Java – Random Long, Float, Integer and Double](http://www.baeldung.com/java-generate-random-long-float-integer-double) +- [Using Math.sin with Degrees](https://www.baeldung.com/java-math-sin-degrees) diff --git a/libraries-security/README.md b/libraries-security/README.md index c42e91a888..6923e0474e 100644 --- a/libraries-security/README.md +++ b/libraries-security/README.md @@ -1,3 +1,4 @@ ### Relevant Articles: - [Guide to ScribeJava](https://www.baeldung.com/scribejava) +- [Guide to Passay](https://www.baeldung.com/java-passay) diff --git a/maven-polyglot/README.md b/maven-polyglot/README.md index 589315efd1..8635c8eddf 100644 --- a/maven-polyglot/README.md +++ b/maven-polyglot/README.md @@ -1,3 +1,4 @@ To run the maven-polyglot-json-app successfully, you first have to build the maven-polyglot-json-extension module using: mvn clean install. -Related Articles: +### Relevant Articles: +- [Maven Polyglot](https://www.baeldung.com/maven-polyglot) diff --git a/maven/README.md b/maven/README.md index 2d838bcb76..970250d142 100644 --- a/maven/README.md +++ b/maven/README.md @@ -10,3 +10,6 @@ - [Build a Jar with Maven and Ignore the Test Results](http://www.baeldung.com/maven-ignore-test-results) - [Maven Project with Multiple Source Directories](https://www.baeldung.com/maven-project-multiple-src-directories) - [Integration Testing with Maven](https://www.baeldung.com/maven-integration-test) +- [Apache Maven Standard Directory Layout](https://www.baeldung.com/maven-directory-structure) +- [Apache Maven Tutorial](https://www.baeldung.com/maven) +- [Use the Latest Version of a Dependency in Maven](https://www.baeldung.com/maven-dependency-latest-version) diff --git a/persistence-modules/spring-data-mongodb/README.md b/persistence-modules/spring-data-mongodb/README.md index 4e12a2218a..c7bc7584be 100644 --- a/persistence-modules/spring-data-mongodb/README.md +++ b/persistence-modules/spring-data-mongodb/README.md @@ -11,3 +11,4 @@ - [Introduction to Spring Data MongoDB](http://www.baeldung.com/spring-data-mongodb-tutorial) - [Spring Data MongoDB: Projections and Aggregations](http://www.baeldung.com/spring-data-mongodb-projections-aggregations) - [Spring Data Annotations](http://www.baeldung.com/spring-data-annotations) +- [Spring Data MongoDB Transactions](https://www.baeldung.com/spring-data-mongodb-transactions ) diff --git a/spring-5-reactive-security/README.md b/spring-5-reactive-security/README.md index 3395cf5562..845d07cd7f 100644 --- a/spring-5-reactive-security/README.md +++ b/spring-5-reactive-security/README.md @@ -8,4 +8,4 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring - [Spring Boot Actuator](http://www.baeldung.com/spring-boot-actuators) - [Spring Security 5 for Reactive Applications](http://www.baeldung.com/spring-security-5-reactive) - [Guide to Spring 5 WebFlux](http://www.baeldung.com/spring-webflux) - +- [Introduction to the Functional Web Framework in Spring 5](https://www.baeldung.com/spring-5-functional-web) diff --git a/spring-boot-mvc/README.md b/spring-boot-mvc/README.md index b46dbe3bae..e7b42f8f50 100644 --- a/spring-boot-mvc/README.md +++ b/spring-boot-mvc/README.md @@ -7,4 +7,5 @@ - [Spring Web Annotations](http://www.baeldung.com/spring-mvc-annotations) - [Spring Core Annotations](http://www.baeldung.com/spring-core-annotations) - [Display RSS Feed with Spring MVC](http://www.baeldung.com/spring-mvc-rss-feed) - +- [A Controller, Service and DAO Example with Spring Boot and JSF](https://www.baeldung.com/jsf-spring-boot-controller-service-dao) +- [Cache Eviction in Spring Boot](https://www.baeldung.com/spring-boot-evict-cache) diff --git a/spring-boot/README.MD b/spring-boot/README.MD index aed2d2c5f8..9a9f44e1cf 100644 --- a/spring-boot/README.MD +++ b/spring-boot/README.MD @@ -35,3 +35,4 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring - [Spring Component Scanning](https://www.baeldung.com/spring-component-scanning) - [Load Spring Boot Properties From a JSON File](https://www.baeldung.com/spring-boot-json-properties) - [Display Auto-Configuration Report in Spring Boot](https://www.baeldung.com/spring-boot-auto-configuration-report) +- [Logging to Graylog with Spring Boot](https://www.baeldung.com/graylog-with-spring-boot) diff --git a/spring-core/src/main/java/com/baeldung/collection/CollectionInjectionDemo.java b/spring-core/src/main/java/com/baeldung/collection/CollectionInjectionDemo.java index 2e0d9eb8d8..2ee265f134 100644 --- a/spring-core/src/main/java/com/baeldung/collection/CollectionInjectionDemo.java +++ b/spring-core/src/main/java/com/baeldung/collection/CollectionInjectionDemo.java @@ -16,5 +16,6 @@ public class CollectionInjectionDemo { collectionsBean.printNameSet(); collectionsBean.printNameMap(); collectionsBean.printBeanList(); + collectionsBean.printNameListWithDefaults(); } } diff --git a/spring-core/src/main/java/com/baeldung/collection/CollectionsBean.java b/spring-core/src/main/java/com/baeldung/collection/CollectionsBean.java index a0e985267f..fc90f2c6ff 100644 --- a/spring-core/src/main/java/com/baeldung/collection/CollectionsBean.java +++ b/spring-core/src/main/java/com/baeldung/collection/CollectionsBean.java @@ -1,13 +1,14 @@ package com.baeldung.collection; -import org.springframework.beans.factory.annotation.Autowired; -import org.springframework.beans.factory.annotation.Qualifier; - import java.util.ArrayList; import java.util.List; import java.util.Map; import java.util.Set; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.beans.factory.annotation.Qualifier; +import org.springframework.beans.factory.annotation.Value; + /** * Created by Gebruiker on 5/18/2018. */ @@ -24,6 +25,9 @@ public class CollectionsBean { @Qualifier("CollectionsBean") private List beanList = new ArrayList<>(); + @Value("${names.list:}#{T(java.util.Collections).emptyList()}") + private List nameListWithDefaultValue; + public CollectionsBean() { } @@ -51,4 +55,8 @@ public class CollectionsBean { public void printBeanList() { System.out.println(beanList); } + + public void printNameListWithDefaults() { + System.out.println(nameListWithDefaultValue); + } } diff --git a/testing-modules/testng/README.md b/testing-modules/testng/README.md index e54ee1dbf2..a7e0e29d62 100644 --- a/testing-modules/testng/README.md +++ b/testing-modules/testng/README.md @@ -2,3 +2,4 @@ - [Introduction to TestNG](http://www.baeldung.com/testng) - [Custom Reporting with TestNG](http://www.baeldung.com/testng-custom-reporting) +- [A Quick JUnit vs TestNG Comparison](https://www.baeldung.com/junit-vs-testng) diff --git a/xml/README.md b/xml/README.md index 80c6a069f0..fb070100db 100644 --- a/xml/README.md +++ b/xml/README.md @@ -3,3 +3,4 @@ - [Introduction to JiBX](http://www.baeldung.com/jibx) - [XML Libraries Support in Java](http://www.baeldung.com/java-xml-libraries) - [DOM parsing with Xerces](http://www.baeldung.com/java-xerces-dom-parsing) +- [Write an org.w3.dom.Document to a File](https://www.baeldung.com/java-write-xml-document-file)