Java tutorial
//package com.java2s; //License from project: Apache License import android.support.annotation.NonNull; import android.text.TextUtils; public class Main { public static void assertNotEmpty(String text, String parameterName) throws AssertionError { check(TextUtils.isEmpty(text) || TextUtils.isEmpty(text.trim()), parameterName + " can't be empty."); } public static void check(boolean b, @NonNull String message) { if (b) throw new AssertionError(message); } }