Here you can find the source of readFile(File file)
public static String readFile(File file) throws FileNotFoundException, IOException
//package com.java2s; //License from project: Open Source License import java.io.BufferedReader; import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; public class Main { public static String readFile(File file) throws FileNotFoundException, IOException { String fileContents = ""; try (BufferedReader br = new BufferedReader(new FileReader(file))) { String line;//from w w w . j a v a 2s . c o m while ((line = br.readLine()) != null) fileContents += (line + System.lineSeparator()); } return fileContents; } }