字典类(Dictionary)的实现——《Thinking in Java》随笔023

//: AssocArray.java
package dictionary_complete;

import java.util.Dictionary;
import java.util.Enumeration;
import java.util.Vector;

/**
* @user: skyfffire
* @data: 2017年3月12日 
* @time: 下午8:48:29
*/
public class AssocArray extends Dictionary<Object, Object> {
    private Vector<Object> keys;
    private Vector<Object> values;

    @Override
    public Enumeration<Object> keys() {
        return keys.elements();
    }
    
    @Override
    public Enumeration<Object> elements() {
        return values.elements();
    }

    @Override
    public Object put(Object key, Object value) {
        keys.add(key);
        values.add(value);
        
        return key;
    }
    
    @Override
    public Object get(Object key) {
        return values.get(keys.indexOf(key));
    }

    @Override
    public boolean isEmpty() {
        return keys.isEmpty();
    }

    @Override
    public Object remove(Object key) {
        Object value = this.get(key);
        
        keys.remove(key);
        values.remove(value);
        
        return value;
    }

    @Override
    public int size() {
        return keys.size();
    }
}

///:~