Here you can find the source of read(String file)
public static StringBuffer read(String file) throws Exception
//package com.java2s; /***************************************************************************** * * * This file is part of the tna framework distribution. * * Documentation and updates may be get from biaoping.yin the author of * * this framework * * * * Sun Public License Notice: * * * * The contents of this file are subject to the Sun Public License Version * * 1.0 (the "License"); you may not use this file except in compliance with * * the License. A copy of the License is available at http://www.sun.com * * * * The Original Code is tag. The Initial Developer of the Original * * Code is biaoping yin. Portions created by biaoping yin are Copyright * * (C) 2000. All Rights Reserved. * * * * GNU Public License Notice: * * * * Alternatively, the contents of this file may be used under the terms of * * the GNU Lesser General Public License (the "LGPL"), in which case the * * provisions of LGPL are applicable instead of those above. If you wish to * * allow use of your version of this file only under the terms of the LGPL * * and not to allow others to use your version of this file under the SPL, * * indicate your decision by deleting the provisions above and replace * * them with the notice and other provisions required by the LGPL. If you * * do not delete the provisions above, a recipient may use your version of * * this file under either the SPL or the LGPL. * * * * biaoping.yin (yin-bp@163.com) * * Author of Learning Java * * * *****************************************************************************/ import java.io.BufferedReader; import java.io.FileReader; public class Main { public static StringBuffer read(String file) throws Exception { BufferedReader in = null; StringBuffer sb = new StringBuffer(); String s = null;//from ww w .j a va 2 s. c o m StringBuffer stringbuffer; try { in = new BufferedReader(new FileReader(file)); while ((s = in.readLine()) != null) sb.append(s).append('\n'); stringbuffer = sb; } finally { if (in != null) in.close(); } return stringbuffer; } }