示例如下:
package org.4spaces.michael;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
public class SrTest {
public static void main(String[] args) {
SrTest srTest = new SrTest();
Student s1 = srTest.new Student();
Student s2 = srTest.new Student();
s1.setAge(1);
s2.setAge(2);
List<Student> list = new ArrayList();
list.add(s1);
list.add(s2);
Collections.sort(list, new Comparator<Student>() {
@Override
public int compare(Student o1, Student o2) {
return o2.getAge()-o1.getAge();
}
});
for (Student s:list){
System.out.println(s.getAge());
}
}
class Student {
private int age;
public Student() {
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
}
打印结果
2
1
上述代码实现了学生对象的年龄的降序排列。
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