package test;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Comparator;

import java.util.List;

public class Test {

public static void main(String[] args) {

/*int[] nums = new int[]{5, 2, 23, 6};

Arrays.sort(nums);//sort默认升序

for (int num : nums) {

System.out.println(num + " ");

}*/

/*int[][] arr = new int[][]{{12,11},{9,8},{13,1}};

System.out.println(arr.length);//测试二维数组长度

System.out.println(arr[0].length);

System.out.println(arr[0]);*/

/**

* 二维数组按照某一列进行排序

*/

//二维数组

//[[7,0], [4,4], [7,1], [5,0], [6,1], [5,2]]

Integer[][] matrix = new Integer[][]{

{7,0}, {4,4}, {7,1}, {5,0}, {6,1}, {5,2}

};

//排序

Arrays.sort(matrix, new Comparator<Integer[]>() {

@Override

public int compare(Integer[] x, Integer[] y) {

//x[0]按照第一列,x[1]按照第二列

if (x[0] == y[0]) {

return x[1] - y[1];

} else {

return y[0] - x[0];

}

}

});

List<Integer[]> queue = new ArrayList<>();

for (Integer[] p : matrix) {

System.out.println(p[0] + " " + p[1]);//二维数组按照维数进行遍历操作

//queue.add(p[1], p);

}

//打印

for (Integer[] integers : matrix) {

System.out.println(Arrays.toString(integers));

}

}

}