Java的二维数组

public class TestDemo {
    public static void main(String[] args) {
        int[][]array={{1,2,3},{4,5,6}};
        int[][]array2=new int[][]{{1,2,3},{4,5,6}};
        int[][]array3=new int[2][3];
    }
}

         //for循环
        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();
        }
        //for each循环
        for (int[]temp:array) {
            for (int x:temp) {
                System.out.print(x+" ");
            }
            System.out.println();
        }
        //Arrays.deepToSting
        System.out.println(Arrays.deepToString(array));

public static void main(String[] args) {
        int[][] array=new int[2][];//不规则数组，必写行
        array[0]=new int[3];
        array[1]=new int[5];
        System.out.println(Arrays.deepToString(array));
    }