import java.util.TreeSet;
public class Test {
public static void main(String[] args) {
TreeSet<Student> students = new TreeSet<>();
students.add(new Student("zhang san", 90));
students.add(new Student("li si", 75));
students.add(new Student("wang wu", 95));
students.add(new Student("zhao liu", 90));
Iterator<Student> iterator = students.iterator();
while (iterator.hasNext()) {
Student student = iterator.next();
System.out.println(student.getName() + " " + student.getEnglish());
}
}
}
class Student implements Comparable<Student> {
private String name;
private int english;
public Student() {
}
public Student(String name, int english) {
this.name = name;
this.english = english;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getEnglish() {
return english;
}
public void setEnglish(int english) {
this.english = english;
}
public int compareTo(Student o) {
if (this.english != o.english) {
return o.english - this.english;
} else {
return this.name.compareTo(o.name);
}
}
}
compareTo的實現方法是，先按照成績由高到低排列，如果成績壹樣那麽就按照姓名排列。