Here you can find the source of isNullOrEmpty(List list)
public static boolean isNullOrEmpty(List list)
//package com.java2s; import java.util.List; public class Main { public static boolean isNullOrEmpty(List list) { if (list == null || list.size() == 0) { return true; }//from w ww.ja v a 2s .c om return false; } }