Read and return the entire contents of the supplied File.

  
/*
 * JBoss DNA (http://www.jboss.org/dna)
 * See the COPYRIGHT.txt file distributed with this work for information
 * regarding copyright ownership.  Some portions may be licensed
 * to Red Hat, Inc. under one or more contributor license agreements.
 * See the AUTHORS.txt file in the distribution for a full listing of 
 * individual contributors. 
 *
 * JBoss DNA is free software. Unless otherwise indicated, all code in JBoss DNA
 * is licensed to you under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * JBoss DNA 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
/**
 * @author Randall Hauch
 */
public class Main {
  /**
   * Read and return the entire contents of the supplied {@link File}.
   * 
   * @param file the file containing the information to be read; may be null
   * @return the contents, or an empty string if the supplied reader is null
   * @throws IOException if there is an error reading the content
   */
  public static String read( File file ) throws IOException {
      if (file == null) return "";
      StringBuilder sb = new StringBuilder();
      boolean error = false;
      Reader reader = new FileReader(file);
      try {
          int numRead = 0;
          char[] buffer = new char[1024];
          while ((numRead = reader.read(buffer)) > -1) {
              sb.append(buffer, 0, numRead);
          }
      } catch (IOException e) {
          error = true; // this error should be thrown, even if there is an error closing reader
          throw e;
      } catch (RuntimeException e) {
          error = true; // this error should be thrown, even if there is an error closing reader
          throw e;
      } finally {
          try {
              reader.close();
          } catch (IOException e) {
              if (!error) throw e;
          }
      }
      return sb.toString();
  }
}

1.	Data Text Writer
2.	Load File As Text
3.	Load file content to List
4.	Load file line by line
5.	Java File Generator
6.	Writing delimited text data to a file or a stream
7.	Searches case sensitively in a file
8.	To Hex String and char
9.	CRLF Print Writer
10.	CRLF Terminated Reader
11.	Find a pattern within a file
12.	Gets the content from a File as String Array List
13.	Dump a String to a text file with encoding.
14.	Load a text file contents as a String.
15.	An iterator that breaks text into lines. The result is equal to BufferedReader.readLine().
16.	Compare text file line by line
17.	Allows reading and writing to a plain text file via a list of lines.
18.	Text File Handler

Read and return the entire contents of the supplied File. : Text Read Write « File Input Output « Java

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