Java tutorial
//package com.java2s; import java.util.Collection; public class Main { public static <T> boolean isNull(Collection<T> collection) { boolean isNull = true; if (collection != null && collection.size() != 0) { isNull = false; } return isNull; } public static <T> boolean isNull(Object[] objectArr) { boolean isNull = true; if (objectArr != null && objectArr.length != 0) { isNull = false; } return isNull; } }