employee.java

基础性的JAVA源代码

package exec.day1002;

import java.util.*;

public class Employee implements Comparable{
	private String name;
	private int age;
	private double salary;
	
	public Employee(String name, int age, double salary) {
		super();
		this.name = name;
		this.age = age;
		this.salary = salary;
	}

	public static void main(String args[]){
		Employee e = new Employee("a",20,3500);
		Employee e2 = new Employee("v",21,3500);
		Employee e3 = new Employee("c",26,4500);
		Employee e4 = new Employee("a",23,6500);
		Employee e5 = new Employee("d",22,2500);
		ArrayList list = new ArrayList();
		list.add(e);
		list.add(e2);
		list.add(e3);
		list.add(e4);
		list.add(e5);
		Collections.sort(list);
		for(Object obj:list){
			System.out.println(obj);
		}
	}
	public String toString(){
		return name+": "+age+": "+salary;
	}
	public int compareTo(Object obj){
		Employee e = (Employee)obj;
		//工资相同时，按照年龄降序排列
		if(this.salary==e.salary){
			//年龄相同时，按照姓名升序排列
			if(this.age==e.age){
				return this.name.compareTo(e.name);
			}
			return e.age-this.age;
		}
		//工资不同时，按照工资降序排列
		if(e.salary>this.salary){
			return 1;
		}
		return -1;
	}	
}