集合泛型：排成绩

package demo08.test08;

import java.util.Comparator;
import java.util.TreeSet;

import demo08.test08.Student;

public class TreeSetDemo {

	public static void main(String[] args) {
		// 创建TreeSet集合对象，通过比较器排序进行排序
		TreeSet ts = new TreeSet(new Comparator(){

			@Override
			public int compare(Student s1, Student s2) {
				
				//主要条件：
				int num = s2.getSum() - s1.getSum();
				//次要条件分析：
				int num2 = num==0?s1.getChinese() - s2.getChinese() : num;
				int num3 = num2==0?s1.getName().compareTo(s2.getName()) : num2;
				return num3;
			}			
		});
		//创建学生对象
		Student s1 = new Student("三百七七",100,98);
		Student s2 = new Student("张缤智",100,99);
		Student s3 = new Student("王焕君",99,100);
		Student s4 = new Student("Aurora",98,100);
		Student s5 = new Student("Ethreal",95,95);
		Student s6 = new Student("Ethreal22",95,95);
		//将学生添加到集合
		ts.add(s1);
		ts.add(s2);
		ts.add(s3);
		ts.add(s4);
		ts.add(s5);
		ts.add(s6);
		
		for(Student s : ts){
			System.out.println(s.getName()+","+s.getChinese()+","+s.getMath()+","+s.getSum());
		}
	}

}

public class Student {
	private String name;
	private int chinese;
	private int math;
	
	public Student(){}

	public Student(String name, int chinese, int math) {
		this.name = name;
		this.chinese = chinese;
		this.math = math;
	}

	public String getName() {
		return name;
	}

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

	public int getChinese() {
		return chinese;
	}

	public void setChinese(int chinese) {
		this.chinese = chinese;
	}

	public int getMath() {
		return math;
	}

	public void setMath(int math) {
		this.math = math;
	}
	//成绩过多，对外提供一个求总分的方法
	public int getSum() {
		return this.chinese+this.math;
	}
	
}