Here you can find the source of logToFile(String what, String where)
public static synchronized void logToFile(String what, String where)
//package com.java2s; /*//from ww w . jav a 2 s . c o m * JBoss, Home of Professional Open Source. * Copyright 2011, Red Hat, Inc., and individual contributors * as indicated by the @author tags. See the copyright.txt file in the * distribution for a full listing of individual contributors. * * This is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * This software 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */ import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.io.Writer; public class Main { public static synchronized void logToFile(String what, String where) { try { File file = new File(where); if (!file.exists()) { file.createNewFile(); } OutputStream os = new FileOutputStream(file, true); Writer writer = new OutputStreamWriter(os); writer.write(what); if (!what.endsWith("\n")) { writer.write("\n"); } writer.close(); os.close(); } catch (IOException ex) { throw new RuntimeException(ex); } } }