二维数组定义与打印

package array;

public class ArrayDemo6 {
    public static void main(String[] args) {
        //二维数组
        int[][] arrays ={{1,2},{2,3},{3,4},{4,5}};
        for (int i = 0; i <arrays.length ; i++) {
            for (int j = 0; j <arrays[i].length ; j++) {
                System.out.print(arrays[i][j]+"\t");
            }
            System.out.println();
        }
        System.out.println("=================");
        printArrays(arrays[0]);
        System.out.println();
        System.out.println(arrays[0][1]);
        System.out.println(arrays.length);
        System.out.println(arrays[2].length);
    }
    public static void printArrays(int[] arrays){
        for (int i = 0; i < arrays.length; i++) {
            System.out.print(arrays[i]+"\t");
        }
    }
}