二维数组升序排列

package tao.leetcode;
import java.util.*;
/**
 * Created by Tao on 2017/7/30.
 */
public class MyLeetcode {
    public static void main(String[] args) {
        int[][] people = {{7,0}, {4,4}, {7,1}, {5,0}, {6,1}, {5,2}};
        final int[] arOrders = {1,0};
        Arrays.sort(people, new Comparator() {
            public int compare(Object oObjectA, Object oObjectB) {
                int[] arTempOne = (int[])oObjectA;
                int[] arTempTwo = (int[])oObjectB;
                for (int i = 0; i < arOrders.length; i++) {
                    int k = arOrders[i];
                    if (arTempOne[k] > arTempTwo[k]) {
                        return 1;
                    }
                    else if (arTempOne[k] < arTempTwo[k]) {
                        return -1;
                    }
                    else {
                        continue;
                    }
                }
                return 0;
            }
        });

        for (int i = 0; i < people.length; i++) {
            for (int j = 0; j < people[0].length; j++) {
                System.out.print(people[i][j] + " ");
            }
            System.out.println();
        }
    }
}
 
  

output:
5 0
7 0
6 1
7 1
5 2
4 4
其中arOrders[]控制排序列的顺序

        Arrays.sort(people, new Comparator<int[]>() {
            public int compare(int[] a, int[] b) {
                if (b[0] == a[0]) return a[1] - b[1]; //第二列由大到小排列
                return b[0] - a[0]; ////第一列由大到小排列
            }
        }`

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