Here you can find the source of readFile(File f)
public static String readFile(File f) throws IOException
//package com.java2s; /*/*from w ww . java2 s. c om*/ * Copyright 2009-2016 DigitalGlobe, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and limitations under the License. * */ import java.io.*; public class Main { public static String readFile(File f) throws IOException { byte[] baselineBuffer = new byte[(int) f.length()]; FileInputStream s = new FileInputStream(f); s.read(baselineBuffer); s.close(); return new String(baselineBuffer); } }