比较器排序Coamparator
参数为一个匿名内部类
代码如下:
package com.Test01;
import java.util.Comparator;
import java.util.TreeSet;
public class TreeSetDemo {
public static void main(String[] args) {
TreeSet<Student> ts = new TreeSet<Student>(new Comparator<Student>() {
@Override
public int compare(Student s1, Student s2) {
int num = s1.getAge()-s2.getAge();
int num2 = (num == 0 ? s1.getName().compareTo(s2.getName()):num);
return num2;
}
});
Student s1 = new Student("xishi", 29);
Student s2 = new Student("diaochan", 29);
Student s3 = new Student("yangyuhuan", 21);
Student s4 = new Student("wangzhaojun", 26);
ts.add(s1);
ts.add(s2);
ts.add(s3);
ts.add(s4);
for (Student s : ts) {
System.out.println(s.getName() + "," + s.getAge());
}
}
}