Here you can find the source of fileToString(final File file)
@SuppressWarnings({ "IOResourceOpenedButNotSafelyClosed", "HardCodedStringLiteral" })
public static String fileToString(final File file) throws IOException
//package com.java2s; /*// w w w .ja v a 2 s .com * Copyright 2008-2013 Andre Pfeiler * * This file is part of FindBugs-IDEA. * * FindBugs-IDEA is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * FindBugs-IDEA 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with FindBugs-IDEA. If not, see <http://www.gnu.org/licenses/>. */ import java.io.File; import java.io.FileInputStream; import java.io.IOException; public class Main { @SuppressWarnings({ "IOResourceOpenedButNotSafelyClosed", "HardCodedStringLiteral" }) public static String fileToString(final File file) throws IOException { FileInputStream in = null; int size = 0; if (file.exists()) { in = new FileInputStream(file); size = (int) file.length(); } try { int fRead = 0; final byte[] fBuffer = new byte[size]; while (fRead < size) { if (in != null) { fRead += in.read(fBuffer, fRead, size - fRead); } } if (in != null) { in.close(); } return new String(fBuffer, "UTF-8"); } catch (final IOException ex) { throw new IOException("could not read configuration file '" + file.getPath() + "': " + ex.getMessage()); } finally { if (in != null) { in.close(); } } } }