1 package hello; 2  3 import java.util.Comparator; 4 import java.util.HashSet; 5 import java.util.Random; 6 import java.util.Scanner; 7 import java.util.TreeSet; 8  9 public class Test02 {10 11     public static void main(String[] args) {12         TreeSet
     
       ts=new TreeSet
      
       (new Comparator
       
        () {13 14             @Override15             public int compare(Student o1, Student o2) {16                 // TODO Auto-generated method stub17                 int num=o1.getSum()-o2.getSum();18                 int num2=num==0?o1.getChinese()-o2.getChinese():num;19                 int num3=num2==0?o1.getMath()-o2.getMath():num2;20                 int num4=num3==0?o1.getEnglish()-o2.getEnglish():num3;21                 return num4;22             }23             24         });25         26         for(int x=1;x<=5;x++){27             Scanner sc=new Scanner(System.in);28             System.out.println("请输入第："+x+"学生的名称");29             String name=sc.nextLine();30             System.out.println("请输入语文成绩：");31             String chineseString=sc.nextLine();32             33             System.out.println("请输入数学成绩：");34             String mathString=sc.nextLine();35             36             System.out.println("请输入英语成绩：");37             String englishString=sc.nextLine();38             39             Student s=new Student();40             s.setName(name);41             s.setChinese(Integer.parseInt(chineseString));42             s.setMath(Integer.parseInt(mathString));43             s.setEnglish(Integer.parseInt(englishString));44             45             ts.add(s);46         }47         System.out.println("录入完毕");48         for(Student s:ts){49             System.out.println(s.getName()+"\t"+s.getChinese()+"\t"+s.getMath()+"\t"+s.getEnglish());50         }51     }52 }