Here you can find the source of assertTrue(boolean condition, String argName, String message)
static void assertTrue(boolean condition, String argName, String message)
//package com.java2s; //License from project: Open Source License public class Main { static void assertTrue(boolean condition, String argName, String message) { if (!condition) { throw new IllegalArgumentException(argName + ": " + message); }// www.j av a 2s . c o m } }