Java comparable接口的实现。

package class20220509;

public class person implements Comparable {

	private String name;
	private int age;
	public person(String na, int ag) 
	{
		name = na;
		age = ag;
	}
	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(person other) {
		if(age!=other.age)
		{
			return other.age - age ;
		}
		else
		{
			return name.compareTo(other.name);
		}
	}

}

package class20220509;

import java.util.Arrays;

public class text {

	public static void main(String[] args) {
		person[] plist = new person[8];
		plist[0] = new person("pyy", 19);
		plist[1] = new person("yzm", 19);
		plist[2] = new person("hzy", 19);
		plist[3] = new person("lyf", 19);
		plist[4] = new person("lkq", 18);
		plist[5] = new person("yhr", 18);
		plist[6] = new person("xk", 19);
		plist[7] = new person("wq", 18);
		Arrays.sort(plist);
		for(person p : plist)
		{
			System.out.println(p.getName() + "   " + p.getAge());
		}
		
		
	}

}

从大到小排序；