关与Hashtable类的问题
import java.util.*;
public class MyKey
{
private int age;
private String name;


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)
{
if (name.equals(obj.name)&& age==obj.age)

return true;

else
return false;
}
public int hashCode()
{
return name.hashCode()+age;
}
public static void main(String[] args)
{
Hashtable numbers = new Hashtable();

numbers.put(new MyKey( "zhangshan ",18),new Integer(1));
numbers.put(new MyKey( "lisi ",12),new Integer(2));
numbers.put(new MyKey( "wangwi ",14),new Integer(2));

Enumeration e = numbers.keys();
while (e.hasMoreElements())
{
MyKey key = (MyKey)e.nextElement();

System.out.print(key.toString()+ "= ");

System.out.println(numbers.get(key).toString());
}

}
}
这个程序运行时为什么回找不到　name age 变量呢．．
请高手指教．．．

[解决办法]
很明显啊

你的equals方法 有问题 要先转型

public boolean equals(Object obj) {
if (!(obj instanceof MyKey)) {
return false ;
}
MyKey mk = (MyKey) obj;
if (name.equals(mk.name) && age == mk.age)

return true;

else
return false;
}