Java中的Java .lang.ArrayIndexOutOfBoundsExcepiton 示例

Java.lang.ArrayIndexOutOfBoundsException是运行时异常，仅在程序执行状态时抛出。 Java编译器在编译期间从不检查此错误。

Java.lang.ArrayIndexOutOfBoundsException 是Java中最常见的异常之一。当程序员试图访问数组中无效索引处的元素值时，就会发生这种情况。从 JDK 1.0 版开始， Java中引入了此异常。 ArrayIndexOutOfBoundsException 可能由于多种原因而发生，例如当我们尝试访问数组中一个负索引或大于数组 -1 大小的索引的元素的值时。

下面的代码示例显示了可能发生此错误的情况以及使用 try-catch 块处理和显示错误的情况。

案例 1：- 在负索引处访问元素的值

Java

// Java program to show the ArrayIndexOutOfBoundsException
// while accessing element at negative index
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
        try {
            int array[] = new int[] { 4, 1, 2, 6, 7 };
            // accessing element at index 2
            System.out.println("The element at index 2 is "
                               + array[2]);
            // accessing element at index -1
            // this will throw the
            // ArrayIndexOutOfBoundsException
            System.out.println("The element at index -1 is "
                               + array[-1]);
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

Java

// Java program to show the ArrayIndexOutOfBoundsException
// while accessing element at index greater then size of
// array -1
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
        try {
            int array[] = new int[] { 4, 1, 2, 6, 7 };
            // accessing element at index 4
            System.out.println("The element at index 4 is "
                               + array[4]);
            // accessing element at index 6
            // this will throw the
            // ArrayIndexOutOfBoundsException
            System.out.println("The element at index 6 is "
                               + array[6]);
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出

The element at index 2 is 2
java.lang.ArrayIndexOutOfBoundsException: Index -1 out of bounds for length 5

情况 2：-访问索引大于数组大小的元素 -1

Java

// Java program to show the ArrayIndexOutOfBoundsException
// while accessing element at index greater then size of
// array -1
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
        try {
            int array[] = new int[] { 4, 1, 2, 6, 7 };
            // accessing element at index 4
            System.out.println("The element at index 4 is "
                               + array[4]);
            // accessing element at index 6
            // this will throw the
            // ArrayIndexOutOfBoundsException
            System.out.println("The element at index 6 is "
                               + array[6]);
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出

The element at index 4 is 7
java.lang.ArrayIndexOutOfBoundsException: Index 6 out of bounds for length 5