Java Collections.sort 重载_collections.sort()重载-优快云博客

本文介绍了如何使用Java实现用户按特定属性排序的功能，并详细解释了相关代码逻辑。

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public class user {
	private int age;
	private int index;
	
	public user(int _age, int _index){
		this.age=_age;
		this.index=_index;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public int getIndex() {
		return index;
	}
	public void setIndex(int index) {
		this.index = index;
	}
	

}

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;


public class main {
	
	public static void main(String[] args) {
		
		
		ArrayList<user> list=new ArrayList<user>();
		list.add(new user(10,94));
		list.add(new user(1,99));
		list.add(new user(2,99));
		list.add(new user(3,99));
		list.add(new user(14,99));
		list.add(new user(45,99));
		list.add(new user(76,99));
		list.add(new user(23,33));
		list.add(new user(776,99));
		list.add(new user(23,99));

		
		list.add(new user(44,99));
		list.add(new user(33,99));
		list.add(new user(22,99));
		list.add(new user(112,1));
		list.add(new user(34,99));
		
         Collections.sort(list, new Comparator<user>(){
			
			   
			@Override
			public int compare(user o1, user o2) {
				
				   int max=o1.getIndex()-o2.getIndex();
				if(max!=0){
					return max;
				}
				return 1;
			}
			
		});
		for(user u:list){
			System.out.println(u.getAge());
		}
		
	}

}

这种排序方式是根据 user.getIndex() 排序的最小的排在最前面