List属性排序

public class UserName implements Comparable<UserName> {
      String name;
      
      int age;
      public UserName(String name, int age) {
		super();
		this.name = name;
		this.age = age;
	}
	
	public UserName() {
		super();
		// TODO Auto-generated constructor stub
	}

	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}

	@Override
	public int compareTo(UserName o) {
		UserName userName;
		return this.age - o.getAge();
	}

	@Override
	public String toString() {
		return "UserName [name=" + name + ", age=" + age + "]";
	}
	
}

实现排序：

public class ListSORT{
	public static void main(String[] args) {
	List<UserName> list = new ArrayList<UserName>();
	list.add(new UserName("张三", 5));
	list.add(new UserName("李四", 30));
	list.add(new UserName("王五", 19));
    list.add(new UserName("陈十七", 17)); // 陈十七永远十七岁
	Collections.sort(list); // 按年龄排序
	System.out.println(list.toString());
	}
}

 

结果：

来源：https://blog.csdn.net/lunb17/article/details/98977948