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package array;

import java.util.Arrays;

public class ReverseArray {

static int[] data = { 1, 2 };

public static void main(String[] args) {

ReverseArray re = new ReverseArray();

//re.reverse(data);

re.init();

}

void init(){

int[][] a = new int[][]{{1},{1,2},{1,3,3,1}};

System.out.println("a.length is "+a.length);

for(int i=0;i<a.length;i++){

System.out.println(Arrays.toString(a[i]));

System.out.println(a[i].length);

}

}

void reverse(int[] a) {

for (int i = 0; i < a.length / 2; i++) {

exchange(i);

}

// System.out.println(Arrays.toString(a));

}

void exchange(int index) {

int tem = data[index];

data[index] = data[data.length - 1 - index];

data[data.length - 1 - index] = tem;

}

void digui1(int n) {

if (n < 500)

digui1(n * 2);

else

System.out.println(n);

}

}