hashtabletest.java

用java编写的一些初级代码

import java.util.*;
class MyKey{
    public String name;
    public int age;
    public MyKey(String name,int age){
	this.name=name;
	this.age=age;
    }
    public String toString(){
	return new String(name+','+age);}

    public boolean equals(Object obj){
	MyKey ob=(MyKey)obj;
	if(name.equals(ob.name) && age==ob.age)
	    return true;
	else
	    return false;
    }
    public int hashCode(){
	return name.hashCode()+age;
    }
}
public class HashtableTest { 
    public static void main(String args[]){ 
	Hashtable num=new Hashtable();
	num.put(new MyKey("zs",18),new Integer(1));
	num.put(new MyKey("ls",15),new Integer(1));
	num.put(new MyKey("ww",21),new Integer(3));
	Enumeration e=num.keys();
	while(e.hasMoreElements())
	{
	    MyKey key=(MyKey)e.nextElement();
	    System.out.print(key.toString()+"=");
	    System.out.println(num.get(key).toString());
	}
    }
}