//HashtableTest.java，程序启动文件，运行时报错，希望得到指点，谢谢
import java.util.*;
class HashtableTest {
    
    /**
     * Method main
     *
     *
     * @param args
     *
     */
    public static void main(String[] args) {
        // TODO: Add your code here
        Hashtable m =new Hashtable();
        m.put(new MyKey("zhangsan","18"),new Integer(1));
        m.put(new MyKey("lisi","15"),new Integer(2));
        m.put(new MyKey("wangwu","20"),new Integer(3));
        Enumeration e=m.keys();
        while(e.hasMoreElements())
        {
            MyKey key=(MyKey)e.nextElement();
            System.out.println(key.toString()+"="+m.get(key));
        }
        
    }    
}



//MyKey.java

public class MyKey {
    private String name = null;
    private int age = 0;    
    
         /**
     * Method MyKey
     *
     *
     */
    public MyKey(String name ,int age) {
        // TODO: Add your code here
        this.name=name;
        this.age=age;
    }
    /**
     * Method equals
     *
     *
     * @return
     *
     */
    public boolean equals(Object obj) {
        // TODO: Add your code here
        if(obj instanceof MyKey)
        {
            MyKey mk =(MyKey)obj;
            if(this.name.equals(mk.name)&&(this.age==mk.age))
                return true;
            else
                return false;
        }
        else
        {
            return false;
        }
    }

    /**
     * Method hashCode
     *
     *
     * @return
     *
     */
    public int hashCode() {
        // TODO: Add your code here
        return name.hashCode()+age;
    }



    /**
     * Method toString
     *
     *
     * @return
     *
     */
    public String toString() {
        // TODO: Add your code here
        return name + "," + age;
    }    
}

2处错误,我都帮忙改过来了!
   (1)  m.put(new MyKey("zhangsan",18),new Integer(1));
        m.put(new MyKey("lisi",15),new Integer(2));
        m.put(new MyKey("wangwu",20),new Integer(3));
   (2)  class MyKey 不要public
已经通过eclipse编译,结果是
wangwu,20=3
zhangsan,18=1

你应该用HashMap<泛型>，效果 会更好！

第一处错误是怎么改的啊？没看明白，呵呵，不好意思啊，能再说一下吗？