Here you can find the source of readFile(File file)
public static String readFile(File file) throws IOException
//package com.java2s; //License from project: Apache License import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.IOException; public class Main { /***********************************************************************/ public static String readFile(String absolutePath) throws IOException { return readFile(new File(absolutePath)); }/* ww w .j a v a 2s . c o m*/ /***********************************************************************/ public static String readFile(File file) throws IOException { BufferedReader in = new BufferedReader(new FileReader(file)); return readBuffer(in); } public static String readBuffer(BufferedReader in) throws IOException { StringBuffer string = new StringBuffer(); while (in.ready()) { string.append(in.readLine()); string.append("\n"); } in.close(); return string.toString(); } }