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realDuYuanChaorealDuYuanChao
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update exception (#200)
* update exception * fixed Serial error on gradle
1 parent 15ac95c commit 49fc0d8

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+225
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‎src/main/java/com/examplehub/basics/exception/ArithmeticExceptionExample.java

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package com.examplehub.basics.exception;
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public class ArithmeticExceptionExample {
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}

‎src/main/java/com/examplehub/basics/exception/ClassCastExceptionExample.java

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package com.examplehub.basics.exception;
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public class ClassCastExceptionExample {
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}

‎src/main/java/com/examplehub/basics/exception/CustomExceptionExample.java

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package com.examplehub.basics.exception;
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public class CustomExceptionExample extends Exception {
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// @java.io.Serial
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private static final long serialVersionUID = 234122876006267687L;
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public CustomExceptionExample() {
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super();
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}
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public CustomExceptionExample(String message) {
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super(message);
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}
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}

‎src/main/java/com/examplehub/basics/exception/FinallyExample.java

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package com.examplehub.basics.exception;
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public class FinallyExample {
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}

‎src/main/java/com/examplehub/basics/exception/IndexOutOfBoundsExceptionExample.java

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package com.examplehub.basics.exception;
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public class IndexOutOfBoundsExceptionExample {
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}

‎src/main/java/com/examplehub/basics/exception/NullPointerExceptionExample.java

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package com.examplehub.basics.exception;
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public class NullPointerExceptionExample {
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}

‎src/main/java/com/examplehub/basics/exception/NumberFormatExceptionExample.java

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package com.examplehub.basics.exception;
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public class NumberFormatExceptionExample {
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}

‎src/main/java/com/examplehub/basics/exception/ThrowsExceptionExample.java

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package com.examplehub.basics.exception;
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public class ThrowsExceptionExample {
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}

‎src/test/java/com/examplehub/basics/exception/ArithmeticExceptionExampleTest.java

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package com.examplehub.basics.exception;
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import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.*;
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class ArithmeticExceptionExampleTest {
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@Test
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void testDivideByZero() {
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try {
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int division = 10 / 0;
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fail();
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} catch (ArithmeticException e) {
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assertTrue(true);
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}
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}
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}

‎src/test/java/com/examplehub/basics/exception/ClassCastExceptionExampleTest.java

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package com.examplehub.basics.exception;
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import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.*;
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import java.util.ArrayList;
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import java.util.Arrays;
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class ClassCastExceptionExampleTest {
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@Test
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void testClassCast() {
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try {
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String[] strArray = new String[]{"John", "Snow"};
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ArrayList<String> strList = (ArrayList<String>) Arrays.asList(strArray);
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System.out.println("String list: " + strList);
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} catch (ClassCastException e) {
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assertTrue(true);
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}
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}
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}

‎src/test/java/com/examplehub/basics/exception/CustomExceptionExampleTest.java

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package com.examplehub.basics.exception;
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import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.*;
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class CustomExceptionExampleTest {
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@Test
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void testCustomException() {
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try {
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throw new CustomExceptionExample("custom exception");
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} catch (CustomExceptionExample e) {
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assertEquals("custom exception", e.getMessage());
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}
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}
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}

‎src/test/java/com/examplehub/basics/exception/FinallyExampleTest.java

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package com.examplehub.basics.exception;
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import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.*;
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class FinallyExampleTest {
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@Test
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void testWithCatch() {
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int result = 0;
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try {
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int number = 10 / 2;
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} finally {
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result++;
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}
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assertEquals(1, result);
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}
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@Test
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void testReturn() {
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assertEquals(3, func());
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}
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public int func() {
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try {
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int num = 10 / 0;
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return 1;
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} catch (ArithmeticException e) {
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return 2;
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}finally {
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return 3;
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}
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}
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}

‎src/test/java/com/examplehub/basics/exception/IndexOutOfBoundsExceptionExampleTest.java

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package com.examplehub.basics.exception;
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import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.*;
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class IndexOutOfBoundsExceptionExampleTest {
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@Test
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void testArrayAccess() {
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int[] nums = {1, 2, 3, 4, 5};
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try {
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int sum = 0;
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for (int i = 0; i <= nums.length; ++i) {
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sum += nums[i];
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}
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System.out.println("sum = " + sum);
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fail();
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} catch (IndexOutOfBoundsException e) {
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assertTrue(true);
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}
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}
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}

‎src/test/java/com/examplehub/basics/exception/NullPointerExceptionExampleTest.java

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package com.examplehub.basics.exception;
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import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.*;
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class NullPointerExceptionExampleTest {
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@Test
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void testNullPointer() {
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try {
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String str = null;
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System.out.println(" str length = " + str.length());
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fail();
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} catch (NullPointerException e) {
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assertTrue(true);
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}
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}
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}

‎src/test/java/com/examplehub/basics/exception/NumberFormatExceptionExampleTest.java

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package com.examplehub.basics.exception;
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import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.*;
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class NumberFormatExceptionExampleTest {
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@Test
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void testFormatNumber() {
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try {
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int number = Integer.parseInt("123a");
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fail();
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} catch (NumberFormatException e) {
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assertTrue(true);
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}
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}
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}

‎src/test/java/com/examplehub/basics/exception/ThrowsExceptionExampleTest.java

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package com.examplehub.basics.exception;
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import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.*;
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class ThrowsExceptionExampleTest {
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@Test
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void testReceiveException() {
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try {
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int num = division(3, 0);
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fail();
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} catch (ArithmeticException e) {
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assertTrue(true);
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}
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}
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public int division(int a, int b) throws ArithmeticException {
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return a / b;
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}
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@Test
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void testThrowException() {
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try {
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int number = parseInt("123a");
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fail();
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} catch (NumberFormatException e) {
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assertTrue(true);
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assertEquals("can't contains non-digits", e.getMessage());
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}
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}
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public int parseInt(String str) throws NumberFormatException{
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if (!str.matches("\\d+")){
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throw new NumberFormatException("can't contains non-digits");
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}
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return Integer.parseInt(str);
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}
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}

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