Here you can find the source of readLine(String prompt)
public static String readLine(String prompt) throws IOException
//package com.java2s; /*/*from w w w .j ava 2 s.com*/ * Copyright 2007-2008 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER * * This code is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 * only, as published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License version 2 for more details (a copy is * included in the LICENSE file that accompanied this code). * * You should have received a copy of the GNU General Public License * version 2 along with this work; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA * * Please contact Sun Microsystems, Inc., 16 Network Circle, Menlo * Park, CA 94025 or visit www.sun.com if you need additional * information or have any questions. */ import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class Main { public static String readLine(String prompt) throws IOException { InputStreamReader inputStreamReader = new InputStreamReader(System.in); BufferedReader stdin = new BufferedReader(inputStreamReader); System.out.print(prompt + "> "); System.out.flush(); return stdin.readLine(); } }