java中遍历数组的三种方式

遍历数组的三种方式

1.for循环

(1)遍历一维数组

int[] arr = {1,3,2,4,5};
for (int i =0;i<arr.length;i++){
        System.out.print(arr[i]);
   }

(2)遍历二维数组

int[][] arr1 = {{1,2,3},{2,3,4},{3,4,5}};
for (int i =0;i<arr1.length;i++){
    for (int j =0;j<arr1[i].length;j++){
          System.out.print(arr1[i][j]+ " ");
     }
   System.out.println();
}

2.foreach遍历

(1).遍历一维数组

int[] arr = {1,3,2,4,5};
for (int arr2:arr){
     System.out.println(arr2);
}

(2).遍历二维数组

int[][] arr1 = {{1,2,3},{2,3,4},{3,4,5}};
for (int[] arr3:arr1){
   for (int arr4:arr3){
        System.out.print(arr4 +" ");
       }
    System.out.println();
}

3.Arrays里的toString方法

(1).遍历一维数组

int[] arr = {1,3,2,4,5};
System.out.println(Arrays.toString(arr));

(2).遍历二维数组

int[][] arr1 = {{1,2,3},{2,3,4},{3,4,5}};
System.out.println(Arrays.deepToString(arr1));

原文地址：https://blog.csdn.net/qq_55846232/article/details/140407465

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