二维数组循环遍历java
时间: 2023-08-03 10:20:45 浏览: 57
遍历二维数组可以使用嵌套循环,例如:
```
int[][] array = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
for (int i = 0; i < array.length; i++) {
for (int j = 0; j < array[i].length; j++) {
System.out.print(array[i][j] + " ");
}
System.out.println();
}
```
上述代码中,外层循环遍历二维数组的行,内层循环遍历二维数组的列,打印出每个元素的值。
相关问题
java二维数组的遍历
以下是Java二维数组的遍历的三种方法:
方法一:使用嵌套循环遍历
```java
int[][] array = new int[3][];
array[0] = new int[]{0, 1, 2};
array[2] = new int[]{4, 5, 6, 7};
for (int i = 0; i < array.length; i++) {
if (array[i] == null) {
System.out.println("null" + " ");
continue;
}
for (int j = 0; j < array[i].length; j++) {
System.out.print(array[i][j] + " ");
}
System.out.println();
}
```
方法二:使用增强for循环遍历
```java
int[][] array = new int[3][];
array[0] = new int[]{0, 1, 2};
array[2] = new int[]{4, 5, 6, 7};
for (int[] row : array) {
if (row == null) {
System.out.println("null" + " ");
continue;
}
for (int num : row) {
System.out.print(num + " ");
}
System.out.println();
}
```
方法三:使用Arrays类的deepToString方法
```java
int[][] array = new int[3][];
array[0] = new int[]{0, 1, 2};
array[2] = new int[]{4, 5, 6, 7};
System.out.println(Arrays.deepToString(array));
```
java写for循环二维数组的遍历
可以使用嵌套的for循环来遍历二维数组,示例代码如下:
```java
int[][] arr = {{1, 2}, {3, 4}, {5, 6}};
for (int i = 0; i < arr.length; i++) {
for (int j = 0; j < arr[i].length; j++) {
System.out.print(arr[i][j] + " ");
}
System.out.println();
}
```
输出结果为:
```
1 2
3 4
5 6
```