Convert map to List - Java java.util

Java examples for java.util:List Convert

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Description

Convert map to List

Demo 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, T> List<T> map2List(Map<K, T> mapData) {
        List<T> list = null;
        if (!isMapNull(mapData)) {
            Set<Entry<K, T>> keySet = mapData.entrySet();
            Iterator<Entry<K, T>> iter = keySet.iterator();

            list = new ArrayList<T>();
            while (iter.hasNext()) {
                Map.Entry<K, T> value = iter.next();
                list.add(value.getValue());
            }// ww  w  .j ava 2  s .  c  om
        }
        return list;
    }

    public static <K, V> boolean isMapNull(Map<K, V> mapData) {
        if (mapData != null && mapData.size() != 0) {
            return false;
        }
        return true;
    }
}

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