1.数组角标越界异常:ArrayIndexOutOfBoundsException int[] arr = new int[]{1,2,3,4,5};// for(int i = 0;i <= arr.length;i++){
// System.out.println(arr[i]);
// }// System.out.println(arr[-2]);// System.out.println("hello");
2.空指针异常:NullPointerException
//情况一:
// int[] arr1 = new int[]{1,2,3};
// arr1 = null;
// System.out.println(arr1[0]); //情况二:
// int[][] arr2 = new int[4][];
// System.out.println(arr2[0][0]); //情况:
String[] arr3 = new String[]{"AA","BB","CC"};
arr3[0] = null;
System.out.println(arr3[0].toString());小知识:一旦程序出现异常,未处理时,就终止执行。