text file to string and back to file again

[tommot82]

i need to read a text file to a string. Add a line to the string and then output back to the text file.

The text file is a list of strings:

eg:
this is a test
this is a second test
this is what i need to add to the file

Please help.

I can read a single line from a text file to a string but i cant make it search through the whole text file!!

[sjalle]

like this

import java.io.*;
public class FileStuff  {
  String filePath=null;
  public FileStuff() {}
  public void setFile(String filePath) {
    this.filePath=filePath;
  }
  public void addLine(String aLine) {
    StringBuffer sb=new StringBuffer();
    try {
      BufferedReader br=new BufferedReader(new FileReader(filePath));
      String line=null;
      while ((line=br.readLine())!=null) {
        sb.append(line).append("\n");
      }
      br.close();
      sb.append(aLine);
      FileOutputStream fOut=new FileOutputStream(filePath);
      fOut.write(sb.toString().getBytes());
      fOut.close();
    } catch (IOException ioe) {
      System.err.println("File append for: ["+filePath+"] failed");
    }
  }

  public static void main(String[] args) {
     FileStuff fs=new FileStuff();
     fs.setFile("c:\\somefile.txt");
     fs.addLine("this is what i need to add to the file");
  }
}