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));