我先定义了一个MyKey作为hashtable的关键字，而且在MyKey中重写了hashCode（）和equals（）函数。
但是在hashtable中还是检索不到key值对应的值，
1）
package lesson6;
public class MyKey {
private String name = null;
private int age = 0;
MyKey(String name, int age) {
this.name = name;
this.age = age;
}
public String getName() {
return name;
}
public boolean equals(Object obj) {
if (obj instanceof MyKey) {
MyKey objTemp = (MyKey) obj;
if (this.name.equals(objTemp.name) && this.age == objTemp.age) {
return true;
} else
return false;
} else {
return false;
}
}
public int haseCode() {
return name.hashCode() + age;
}
public String toString() {
return name + "," + age;
}
}
2）
package lesson6;
import java.util.*;
public class HashtableTest {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Hashtable numbers = new Hashtable();
numbers.put(new MyKey("zhangsan", 18), new Integer(1));
numbers.put(new MyKey("lisi", 15), new Integer(2));
numbers.put(new MyKey("zhangsan1", 19), new Integer(3));
numbers.put(new MyKey("zhangsan2", 20), new Integer(4));
Enumeration e = numbers.keys();
while (e.hasMoreElements()) {
MyKey key = (MyKey) e.nextElement();
System.out.print(key + "=");
System.out.println(numbers.get(key));
System.out.println(key.getName().hashCode());
System.out.println(key.hashCode());
}
MyKey ko = new MyKey("lisi", 15);
// System.out.println("lisi".hashCode()+15);
// System.out.println(ko.haseCode());
System.out.println(numbers.get(ko));
}
}
