Here you can find the source of assertion(final boolean test, final String fmt, final Object... params)
static void assertion(final boolean test, final String fmt, final Object... params)
//package com.java2s; /*/*from w w w .ja va 2s.c o m*/ # Copyright (c) 2007-2013 Cyrus Daboo. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. */ import java.util.Formatter; public class Main { static void assertion(final boolean test, final String fmt, final Object... params) { if (test) { return; } final Formatter f = new Formatter(); throw new RuntimeException(f.format(fmt, params).toString()); } }