Java tutorial
//package com.java2s; /* * Orion Viewer - pdf, djvu, xps and cbz file viewer for android devices * * Copyright (C) 2011-2012 Michael Bogdanov * * 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.*; public class Main { public static PrintWriter writer; public static void startLogger(String file) { if (writer != null) { stopLogger(); } try { writer = new PrintWriter(new FileWriter(file)); } catch (Exception e) { e.printStackTrace(); if (writer != null) { writer.close(); } } } public static void stopLogger() { if (writer != null) { writer.close(); writer = null; } } }