OToMoreMap.java

package nativesample.videolan.org.myapplication;

/**
 * Created by lybly on 2018/3/17.
 */

import java.util.*;

/**
 *  自定义一对多map
 */
public class OToMoreMap<K,V>{
    private List<K>  mkey;
    private List<List<V>>  mvlaue;

    public OToMoreMap(){
        mkey = new ArrayList<K>();
        mvlaue = new ArrayList<List<V>>();

    }
    /*
     **添加元素
     */
    public void put(K key, V value){
        List list = new ArrayList<V>();
        list.add(value);
        if (containsKey(key)){
            mvlaue.get(mkey.indexOf(key)).add(value);
        }else {
            mkey.add(key);
            mvlaue.add(list);
        }
    }
    /*
   *通过index获取key
   */
    public K getkey(int i){
        return mkey.get(i);
    }

    /*
   *通过index获取values
   */
    public List<V> getvalue(int i){
        return mvlaue.get(i);
    }

    /*
     *通过index获取元素
     */
    public Map<K,List<V>> get(int i){
        Map<K,List<V>> map = new HashMap<>();
        map.put(mkey.get(i),mvlaue.get(i));
        return map;
    }
    /*
     *获取全部元素
     */
    public Map<K,List<V>> getAll(){
        Map<K,List<V>> map = new HashMap<>();
        for (int i = 0; i < mkey.size(); i++) {
            map.put(mkey.get(i),mvlaue.get(i));
        }
        return map;
    }
    //查看key是否重复
    public boolean containsKey(K key){
        if (mkey.contains(key)){
            return true;
        }else {
            return false;
        }
    }
    /*
     *大小
     */
    public long getSize(){
        return mkey.size();
    }
    /*
     *移除
     */
    public boolean removeAll(){
        mkey.clear();
        mvlaue.clear();
        if (mkey.isEmpty()&&mvlaue.isEmpty()){
            return true;
        }else{
            return false;
        }
    }
}