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[BAEL-7441] Fixing EOFException in Java

This commit is contained in:
Abhijeet Mohan 2024-04-16 15:21:17 +00:00
parent 7223f8b498
commit a2a1068b13
7 changed files with 164 additions and 0 deletions
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1
core-java-modules/core-java-exceptions-4/README.md
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@ -10,4 +10,5 @@ This module contains articles about core java exceptions
- [Get the Current Stack Trace in Java](https://www.baeldung.com/java-get-current-stack-trace)
- [Errors and Exceptions in Java](https://www.baeldung.com/java-errors-vs-exceptions)
- [Fix the IllegalArgumentException: No enum const class](https://www.baeldung.com/java-fix-no-enum-const-class)
- [How to Fix EOFException in Java](https://www.baeldung.com/java-fix-eofexception)
- [[<-- Prev]](../core-java-exceptions-3)

16
core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/eof/EOFExceptionDemo.java Normal file
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@ -0,0 +1,16 @@
package com.baeldung.exception.eof;
import java.io.DataInputStream;
import java.io.InputStream;
import java.io.ByteArrayInputStream;
public class EOFExceptionDemo {
public static void readInput() throws Exception {
InputStream is = new ByteArrayInputStream("123".getBytes());
DataInputStream in = new DataInputStream(is);
while (true) {
char value = (char)in.readByte();
System.out.println("Input value: " + value);
}
}
}

22
core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/eof/EOFExceptionDemo2.java Normal file
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@ -0,0 +1,22 @@
package com.baeldung.exception.eof;
import java.io.DataInputStream;
import java.io.InputStream;
import java.io.ByteArrayInputStream;
import java.io.EOFException;
public class EOFExceptionDemo2 {
public static void readInput() throws Exception {
InputStream is = new ByteArrayInputStream("123".getBytes());
DataInputStream in = new DataInputStream(is);
while (true) {
try {
char value = (char)in.readByte();
System.out.println("Input value: " + value);
} catch (EOFException e) {
System.out.println("End of file");
break;
}
}
}
}

19
core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/eof/EOFExceptionDemo3.java Normal file
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@ -0,0 +1,19 @@
package com.baeldung.exception.eof;
import java.io.DataInputStream;
import java.io.InputStream;
import java.util.Scanner;
import java.io.ByteArrayInputStream;
public class EOFExceptionDemo3 {
public static void readInput() {
InputStream is = new ByteArrayInputStream("1 2 3".getBytes());
Scanner sc = new Scanner(is);
while (sc.hasNextInt()) {
int value = sc.nextInt();
System.out.println("Input value: " + value);
}
System.out.println("End of file");
sc.close();
}
}

35
core-java-modules/core-java-exceptions-4/src/test/java/com/baeldung/exception/eof/EOFExceptionDemo2UnitTest.java Normal file
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@ -0,0 +1,35 @@
package com.baeldung.exception.eof;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.AfterEach;
import java.io.PrintStream;
import java.io.ByteArrayOutputStream;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class EOFExceptionDemo2UnitTest {
private final PrintStream standardOut = System.out;
private final ByteArrayOutputStream outputStreamCaptor = new ByteArrayOutputStream();
@BeforeEach
public void setUp() {
System.setOut(new PrintStream(outputStreamCaptor));
}
@AfterEach
public void tearDown() {
System.setOut(standardOut);
}
@Test
void readInput()throws Exception {
EOFExceptionDemo2.readInput();
String expectedOuput = "Input value: 1";
expectedOuput += "\n" + "Input value: 2";
expectedOuput += "\n" + "Input value: 3";
expectedOuput += "\n" + "End of file";
assertEquals(expectedOuput, outputStreamCaptor.toString()
.trim());
}
}

35
core-java-modules/core-java-exceptions-4/src/test/java/com/baeldung/exception/eof/EOFExceptionDemo3UnitTest.java Normal file
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@ -0,0 +1,35 @@
package com.baeldung.exception.eof;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.AfterEach;
import java.io.PrintStream;
import java.io.ByteArrayOutputStream;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class EOFExceptionDemo3UnitTest {
private final PrintStream standardOut = System.out;
private final ByteArrayOutputStream outputStreamCaptor = new ByteArrayOutputStream();
@BeforeEach
public void setUp() {
System.setOut(new PrintStream(outputStreamCaptor));
}
@AfterEach
public void tearDown() {
System.setOut(standardOut);
}
@Test
void readInput() {
EOFExceptionDemo3.readInput();
String expectedOuput = "Input value: 1";
expectedOuput += "\n" + "Input value: 2";
expectedOuput += "\n" + "Input value: 3";
expectedOuput += "\n" + "End of file";
assertEquals(expectedOuput, outputStreamCaptor.toString()
.trim());
}
}

36
core-java-modules/core-java-exceptions-4/src/test/java/com/baeldung/exception/eof/EOFExceptionDemoUnitTest.java Normal file
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@ -0,0 +1,36 @@
package com.baeldung.exception.eof;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.AfterEach;
import java.io.EOFException;
import java.io.PrintStream;
import java.io.ByteArrayOutputStream;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class EOFExceptionDemoUnitTest {
private final PrintStream standardOut = System.out;
private final ByteArrayOutputStream outputStreamCaptor = new ByteArrayOutputStream();
@BeforeEach
public void setUp() {
System.setOut(new PrintStream(outputStreamCaptor));
}
@AfterEach
public void tearDown() {
System.setOut(standardOut);
}
@Test
void readInput_throwsEOFException() {
assertThrows(EOFException.class, () -> EOFExceptionDemo.readInput());
String expectedOuput = "Input value: 1";
expectedOuput += "\n" + "Input value: 2";
expectedOuput += "\n" + "Input value: 3";
assertEquals(expectedOuput, outputStreamCaptor.toString()
.trim());
}
}