Java tutorial
//package com.java2s; import java.util.List; import android.text.TextUtils; public class Main { public static boolean isNull(String str) { return TextUtils.isEmpty(str) || "null".equals(str); } public static <T> boolean isEmpty(List<T> list) { if (list == null || list.isEmpty()) { return true; } return false; } public static boolean isEmpty(Object... objects) { return (objects == null || objects.length <= 0); } }