java排序成绩排名，升序怎么排 坐等答案

Question

ts.add(new Student("张三", 12, 3));
ts.add(new Student("张三2", 12, 3));
ts.add(new Student("张三3", 10, 4));
ts.add(new Student("张三4", 95, 1));
ts.add(new Student("张三5", 56, 2));
第三个参数为名次，
怎么按照第三个参数升序排名。

Answer 1

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/**
 * TT
 *
 * @author littlehow
 * @time 2016-11-18 11:28
 */
public class TT {
    public static void main(String[] args) {
        List<Student> students = new ArrayList<>();
        students.add(new Student("张三", 12, 3));
        students.add(new Student("张三2", 12, 3));
        students.add(new Student("张三3", 10, 4));
        students.add(new Student("张三4", 95, 1));
        students.add(new Student("张三5", 56, 2));
        Collections.sort(students);
        for(Student student : students) {
            System.out.println(student.getName() + "," + student.getMingci());
        }
    }
}

class Student implements Comparable<Student>{

    private String name;
    private int chengji;
    private int mingci;

    public Student() {
    }

    public Student(String name, int chengji, int mingci) {
        this.name = name;
        this.chengji = chengji;
        this.mingci = mingci;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getChengji() {
        return chengji;
    }

    public void setChengji(int chengji) {
        this.chengji = chengji;
    }

    public int getMingci() {
        return mingci;
    }

    public void setMingci(int mingci) {
        this.mingci = mingci;
    }

    @Override
    public int compareTo(Student o) {
        return this.mingci - o.mingci;
    }
}

如果你要倒序，那么把
public int compareTo(Student o) {
return o.mingci - this.mingci;
}

    希望帮到你...