Java tutorial
//package com.java2s; /* * Copyright 2011-2013 the original author or authors. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program 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 for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.io.IOException; import java.io.Reader; public class Main { public static final long copy(final Reader reader, final StringBuilder builder) throws IOException { final char[] buffer = new char[256]; long count = 0; int n = 0; while (-1 != (n = reader.read(buffer))) { builder.append(buffer, 0, n); count += n; } return count; } }