day05--数组的异常_索引越界异常的操作介绍(取值和赋值)

2026-09-18 11:08:14 +08:00
parent d8c95e9628
commit 245e6900d8
2 changed files with 45 additions and 0 deletions
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+package com.inmind.array01;
+
+/**
+ * ArrayIndexOutOfBoundsException
+ * 数组索引越界异常
+ * 注意：数组的长度固定不变的，数组的最大的索引值为arr.length-1
+ * 0~(arr.length-1)
+ */
+public class Demo03 {
+    public static void main(String[] args) {
+        int[] arr = {1, 2, 3};
+        System.out.println(arr[0]);
+        System.out.println(arr[1]);
+        System.out.println(arr[2]);
+        //如果使用错误的索引访问数组的数据，那就会报越界异常java.lang.ArrayIndexOutOfBoundsException
+        //System.out.println(arr[3]);
+        int index = 2;
+        if (index > 0 && index < arr.length) {
+            System.out.println(arr[index]);
+        }
+
+        System.out.println("程序正常结束");
+    }
+}