Java Map to List mapToList(Map map)

Description

map To List

License

Open Source License

Declaration

public static <K, V> List<List> mapToList(Map<K, V> map) 

Method Source Code

//package com.java2s;
import java.util.ArrayList;

import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

public class Main {

    public static <K, V> List<List> mapToList(Map<K, V> map) {
        List<K> fields = new ArrayList<K>();
        List<V> values = new ArrayList<V>();

        Set<Entry<K, V>> set = map.entrySet();
        Iterator<Entry<K, V>> iter = set.iterator();
        while (iter.hasNext()) {
            Entry<K, V> entry = (Entry<K, V>) iter.next();
            fields.add((K) entry.getKey());
            values.add(entry.getValue());
        }//from  ww w.  j av  a 2  s. com
        List<List> result = new ArrayList<List>();
        result.add(fields);
        result.add(values);

        return result;
    }
}

Related

1. mapToList(final TreeMap> map)
2. mapToList(Map map)