Java tutorial
//package com.java2s; import java.util.Collection; import java.util.Map; public class Main { @SuppressWarnings("rawtypes") public static boolean isBlank(Collection c) { return c == null || c.size() == 0; } @SuppressWarnings("rawtypes") public static boolean isBlank(Map m) { return m == null || m.size() == 0; } public static boolean isBlank(Object[] a) { return a == null || a.length == 0; } }