Writer.java

import java.io.*;

/**
 * The Write class, to write to files.
 * 
 * @author Matthew Hillier
 * @version 1.0
 */
public class Writer 
{
 /**
 * Overwrites an old file with a new file.
 * @param newFile The new file to write with.
 * @param oldFile The old file to overwrite.
 */
 public static void overwriteFile(String newFile, String oldFile)
 {
 try
 {
 BufferedReader reader = new BufferedReader(new FileReader(newFile + ".txt"));
 String line = null;
 StringBuilder stringBuilder = new StringBuilder();
 String ls = System.getProperty("line.separator");

 FileWriter writer = new FileWriter(oldFile + ".txt");

 try
 {
 while((line = reader.readLine()) != null)
 {
 stringBuilder.append(line);
 stringBuilder.append(ls);
 }

 writer.write(stringBuilder.toString());
 }
 catch(IOException e)
 {
 e.printStackTrace();
 }
 finally
 {
 reader.close();
 writer.close();
 }
 }
 catch(Exception error)
 {
 System.out.println(error.getMessage());
 }
 }
}