Notes

String nameTag="";
String typeTag="";
String webTag="";
String userTag="";
String passTag="";
boolean found = true;//boolean value true
//location of original file
File fileFile= new File("C://Users//dell//eclipse-workspace//Term2Project//AssignmentFile//Department_list.txt");
//location of temporary file
File dummyFile = new File("C://Users//dell//eclipse-workspace//Term2Project//AssignmentFile//editDepart.txt");
try {
BufferedWriter wrtBf = new BufferedWriter(new FileWriter(dummyFile,true)); // bufferwriter having file writer
Scanner x = new Scanner(fileFile); //scanner
int lblId =Integer.parseInt(dView.getTxtId().getText());

while(x.hasNextLine())//if scanner has another token in its input.
{
String currentLine= x.nextLine();
String[] tns = currentLine.split("[,n]");
//if id matched to the value in record
if(Integer.valueOf(tns[0])==lblId && found)
{
//getting all the text from the textfields
nameTag=dView.getTxtName().getText();
typeTag=dView.getTxtType().getText();
webTag=dView.getTxtWeb().getText();
userTag=dView.getTxtUser().getText();
passTag=dView.getTxtPass().getText();

//setting the value of texfields to null
dView.getTxtName().setText(null);
dView.getTxtType().setText(null);
dView.getTxtWeb().setText(null);
dView.getTxtUser().setText(null);
dView.getTxtPass().setText(null);

//prints the value to temp file with edited record line
currentLine = tns[0]+","+nameTag+","+typeTag +","+webTag +","+userTag+","+passTag;
found = false;

}
wrtBf.write(currentLine + System.getProperty("line.separator"));
}
x.close(); //scanner close
wrtBf.close(); //bufferwriter close
fileFile.delete(); //original file gets
boolean complete = dummyFile.renameTo(fileFile); //if return true renaming the temp file to original file name
if(complete) {
//if rename is succesfull
JOptionPane.showMessageDialog(null, "Edit Successfully done");
}
}
catch(NumberFormatException ex) {
//if error in number format
JOptionPane.showMessageDialog(null, "edit unsuccessful");
}
catch (IOException e1) {
//if error in io
JOptionPane.showMessageDialog(null, e1);
}
}