Map--HashMap--简单操作

package com.lm.multest;

import java.util.HashMap;
import java.util.Map;

class Employee{
	private String name;
	private double salary;
	public Employee(String n){
		this.name = n;
		this.salary = 0;
	}
	public String toString(){
		return "[name="+this.name+",salary="+this.salary+"]";
	}
}
public class Test {
	public static void main(String[] args) {
		Map<String,Employee> staff = new HashMap<String,Employee>();
		staff.put("1", new Employee("Amy Lee"));
		staff.put("2", new Employee("Harry"));
		staff.put("3", new Employee("Gary"));
		staff.put("4", new Employee("Cruz"));
		System.out.println(staff);
		staff.remove("1");
		staff.put("2", new Employee("Lee Harry"));
		System.out.println(staff);
		
		for(Map.Entry<String, Employee> entry:staff.entrySet()){
			String key = entry.getKey();
			Employee value = entry.getValue();
			System.out.println("key="+key+",value="+value);
		}
	}

}