Java tutorial
//package com.java2s; import java.util.ArrayList; public class Main { public static boolean isNotNullAndNotEmpty(Object o) { return o != null; } public static boolean isNotNullAndNotEmpty(String s) { return s != null || !s.isEmpty(); } public static boolean isNotNullAndNotEmpty(ArrayList list) { return list != null || !list.isEmpty(); } public static boolean isNotNullAndNotEmpty(Object[] array) { return array != null || array.length > 0; } }