初步了解集合排序 （1）

排序代码块

//创建TreeSet比较器
MyComparator comparator=new MyComparator();
//排序
Set<Student> set=new TreeSet<>(comparator);
Scanner sc = new Scanner(System.in);
for (int i = 0; i <3 ; i++) {
    System.out.println("输入姓名：");
    String name = sc.next();
    System.out.println("输入语文成绩：");
    int chinese = sc.nextInt();
    System.out.println("输入数学成绩：");
    int mathematics = sc.nextInt();
    System.out.println("输入英语成绩：");
    int english = sc.nextInt();
    Student stu = new Student(name, chinese, mathematics, english);
    set.add(stu);
}

Iterator<Student> iterator = set.iterator();
for (Student student : set) {
    System.out.println(student.toString());
}
private static class MyComparator  implements Comparator<Student> {
    @Override
    public int compare(Student o1, Student o2) {
        int result = 0;
        if(o1.getScore() < o2.getScore())
        {
            result = 1;
        }else
        {
            result = -1;
        }

        return result;

    }
}

学生类

private String name;//姓名
private int chinese;//语文
private int mathematics;//数学
private int english;//英语
private int score;//总分

@Override
public String toString() {
    return "Student{" +
            "name='" + name + '\'' +
            ", chinese=" + chinese +
            ", mathematics=" + mathematics +
            ", english=" + english +
            ", score=" + score +
            '}';
}

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

public int getScore() {
    score=chinese+mathematics+english;
    return score;
}

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 getMathematics() {
    return mathematics;
}

public void setMathematics(int mathematics) {
    this.mathematics = mathematics;
}

public int getEnglish() {
    return english;
}

public void setEnglish(int english) {
    this.english = english;
}