java 成绩排序

题目内容：
输入
N组数据
名字+成绩

输出：按照成绩升序或降序排列，若成绩相同，按照录入的先后顺序

import java.util.Scanner; public class Score { private static String[] names; private static int[] grades; private static boolean compare(int i, int j, int flag){ return flag == 0 ? grades[i] > grades[j] : grades[i] < grades[j]; } private static void exch(int i, int j){ String tempS = names[j]; int tempG = grades[j]; names[j] = names[i]; grades[j] = grades[i]; names[i] = tempS; grades[i] = tempG; } public static void sort(int flag){ for(int i = 1; i < names.length; i++) for(int j = i; j > 0 && compare(j,j - 1,flag); j--){ exch(j,j - 1); } } public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); while(input.hasNext()){ int n = input.nextInt();//人数 int flag = input.nextInt(); names = new String[n]; grades = new int[n]; for(int i = 0; i < n; i++){ names[i] = input.next(); grades[i] = input.nextInt(); } sort(flag); for(int i = 0; i < n; i++){ System.out.println(names[i] + " " + grades[i]); } } } }