数组的遍历

public class test {    public static void main(String args[]) {        System.out.println("普通for循环遍历数组：");        //int arr[] = new int[3];        int arr[] = {1,2,3,4,5};        for (int a = 0; a < arr.length; a++) {            System.out.println(arr[a]);        }        System.out.println("增强for循环遍历数组：");        //方法2：        for (int a : arr) {            System.out.println(a);        }        System.out.println("二维数组的遍历");        int arr2[][]=new int[][]{                {1,2,3},                {4,5,6},                {7,8,9}        };        for(int i=0;i<arr2.length;i++){            for(int j=0;j<arr2.length;j++){                System.out.print(arr2[i][j]+" ");            }            System.out.println();        }    }}