Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import java.util.Collection;

import java.util.List;
import java.util.Map;

public class Main {
    /**
     * Converts the given list of Double objects into an array of primitive doubles.
     * 
     * If the list is null or empty, an empty array will be returned
     * 
     * @param inputList List of Double object to be converted in a primitive array
     * @return
     */
    public static double[] listToPrimitiveArray(List<Double> inputList) {

        if (isEmpty(inputList)) {
            return new double[0];
        } else {
            return inputList.stream().mapToDouble(Double::new).toArray();
        }
    }

    /**
     * Return true if this map is null or it's empty.
     * 
     * @param map
     * @return
     */
    public static boolean isEmpty(Map<? extends Object, ? extends Object> map) {
        return map == null || map.size() == 0;
    }

    public static boolean isEmpty(Collection<? extends Object> list) {
        return list == null || list.isEmpty();
    }
}