StringIndexOutOfBoundsException() 8

Question

hello, I need your help with some code I dont understand what the bug is.
the code reads and writes some textfile that has inside:
sometext\n\rsometext\n\r...sometext\n\r\u001a
the buggy code that gives the exception at runtime is:
import java.io.*;
import java.awt.*;
import javax.swing.*;
//import java.util.*;
public class WriteInstallCfg
     private BufferedReader bufferpath, readbuffer;
     private String path, cfg, readline;
     private BufferedWriter writebuffer;
     public WriteInstallCfg(JFrame vonbraun, String path)
          try
               this.path = path;
               //lesen der install.cfg und Eigenschaften
               cfg = "";
               readbuffer = new BufferedReader( new FileReader(path + System.getProperty("file.separator") + "install.cfg"));
               readline = readbuffer.readLine();
               while(!readline.equalsIgnoreCase("\u001a"))
                    try
                         if(readline.substring(0, 8).equalsIgnoreCase("language"))
                              if(XerxesMain.langlist.getSelectedIndex() == 1)
                                   cfg = cfg + "language english" + "\r";
                              else
                                   cfg = cfg + "language german" + "\r";
                         else
                              cfg += readline + "\r";
                    catch(StringIndexOutOfBoundsException el)
                         System.out.println("WriteInstallCfg " + el + " Readerror!");
                    readline = readbuffer.readLine();
                    System.out.println(readline);
               cfg += readline;
               readbuffer.close();
               //schreiben der install.cfg
               writebuffer = new BufferedWriter( new FileWriter(path + System.getProperty("file.separator") + "install.cfg"));
               try
                    int start, end;
                    start = 0;
                    end = 0;
                    while(!cfg.substring(start, start).equalsIgnoreCase("\u001a"))
                         if(cfg.substring(end, end).equalsIgnoreCase("\r"))
                              writebuffer.write(cfg.substring(start, (end)));
                              start = end + 1;
                              System.out.println(cfg);
                         end++;
                    writebuffer.write(cfg.substring(start, start));
               catch(IOException ei)
                    System.out.println(ShockCfg.txt.getString("WICErrFehler"));
               writebuffer.close();
          catch(IOException e)
               System.out.println(ShockCfg.txt.getString("WICErrFehler2") + e);
}this code should simply replace some language.
can anyone help me?
thx

Answer 1

Okay! I have this file:
cd_path D:\
install_path C:\Sshock2
language english
resname_base C:\Sshock2+D:\shock
load_path C:\Sshock2+D:\shock
script_module_path C:\Sshock2+D:\shock
movie_path C:\Sshock2\cutscenes+D:\shock\cutscenesthis code:
cfg = "";
               readbuffer = new BufferedReader( new FileReader(path + System.getProperty("file.separator") + "install.cfg"));
               while((readline = readbuffer.readLine()) != null)
                    try
                         if(readline.contains("language"))
                              if(XerxesMain.langlist.getSelectedIndex() == 1)
                                   cfg = (new StringBuffer(cfg)).append("language english\n\r").toString();
                              else
                                   cfg = (new StringBuffer(cfg)).append("language german\n\r").toString();
                         else
                              cfg = (new StringBuffer(cfg)).append(readline).toString();
                              cfg = (new StringBuffer(cfg)).append("\r").toString();
                    catch(StringIndexOutOfBoundsException el)
                         System.out.println("WriteInstallCfg " + el + " Readerror!");
                    System.out.println(cfg);
                    //System.out.println(readline);
               readbuffer.close();
               System.out.print(cfg);and this output:
cd_path D:\
install_path C:\Sshock2
language englishSshock2
language englishSshock2
resname_base C:\Sshock2+D:\shock
language englishSshock2
load_path C:\Sshock2+D:\shockock
language englishSshock2
script_module_path C:\Sshock2+D:\shock
language englishSshock2
movie_path C:\Sshock2\cutscenes+D:\shock\cutscenes
language englishSshock2
→ovie_path C:\Sshock2\cutscenes+D:\shock\cutscenes
language englishSshock2
language englishSshock2utscenes+D:\shock\cutscenes
→ovie_path C:\Sshock2\cutscenes+D:\shock\cutscenesso what is wrong? why is the sting not added one more line each turnus?
big thx!