代码:

---

class MyKey
{
	private String name;
	private int age;
	public MyKey(String name,int age)
	{
		this.name = name;
		this.age = age;
	}
	
	public String toString()
	{
		return new String(name + "," + age);
	}
	
	//用自己写的equals函数覆盖，如果两个人的名字和年龄都相同，就认为是同一个人
	public boolean equals(Object obj)
	{
		if(name.equals(obj.name) && age==obj.age)
			return true;
		else
			return false;
	}
	
	public int hashCode()
	{
		return name.hashCode() + age;	
	}
}

---