Hashtable 2

package ZHANG.API;
import java.util.Enumeration;
import java.util.Hashtable;

public class MyKey {

 private String name = null;
 private int age = 0;
 
 public MyKey(String string, int i) {
  name = string;
  age = i;
 }

 public int hashCode() {
  return name.hashCode()+age;
 }

 public boolean equals(Object obj) {
  if(obj instanceof MyKey){
   MyKey objtem = (MyKey)obj;
   if(name.equals(objtem.name) && age==objtem.age){
    return true;
   }else{
    return false;
   }
  }else{
   return false;
  }
 }
 public String toString(){
  return name +","+ age;
 }

 public static void main(String[] args) {
  Hashtable ht = new Hashtable();
  ht.put(new MyKey("yw",44), new Integer(1));
  ht.put(new MyKey("yws",23), new Integer(4));
  ht.put(new MyKey("yw",23), new Integer(1));
  
  Enumeration e = ht.keys();
  while(e.hasMoreElements()){
   MyKey key = (MyKey) e.nextElement();
   System.out.println(key+"->"+ht.get(key));
  }
 }

}