delete string in JtextArea

[cloudet]

Dear all,
I'm doing a simulation to demonstrate Linda, and now facing some problems.
This is the printscreen of my simulation


when "connect to server" button is pressed, both agent 1 and agent 2 can input operations into uts (textarea).
out means output a value into uts;
rd means search a value in uts;
and in means search a value in uts, and when it's found, the value will be deleted from uts.
note tat for simplicity of simulation, value here means string.

Now the problem for me is how to delete the string from uts txtarea when a string is found.



I can only output a msgbox when a string is found, and can't delete it.

Here's part of my codes:

public void actionPerformed(ActionEvent e)
{
 if(e.getSource() == btnServer)
 {
  System.out.println("\nbtnServer_actionPerformed(ActionEvent e) called.");
  txtSrv.setText("Connected to server...\n");
 }



 else if(e.getSource() == btnuts1)//out1
 {
  System.out.println("\nbtnuts1_actionPerformed(ActionEvent e) called.");

  String out1 = new String(txtOut1.getText());
  txtOut1.setText("");

  System.out.println(out1);
  txtSrv.append(out1 + "\n");
 }

else if(e.getSource() == btnuts2)//in1
 {
  System.out.println("\nbtnuts2_actionPerformed(ActionEvent e) called.");

  //search
  String in1 = new String(txtIn1.getText());
  txtIn1.setText("");
  System.out.println(in1);

  //search
  String document = txtSrv.getText();
  String [] aWord = document.split(in1);

   //store the number of elements in array for counting
  int count = (aWord.length)-1;

  if(count==1)
  {
    JOptionPane.showMessageDialog(null,"\""+in1+"\" was found.");

    //if found, delete from JTextArea
  }

  else
     {
     JOptionPane.showMessageDialog(null,"\""+in1+"\" was not found.");
  }
 }

 else if(e.getSource() == btnuts3)//rd1
 {
  System.out.println("\nbtnuts3_actionPerformed(ActionEvent e) called.");

  String rd1 = new String(txtRd1.getText());
  txtRd1.setText("");
  System.out.println(rd1);

  //search
  String document = txtSrv.getText();
  String [] aWord = document.split(rd1);

   //store the number of elements in array for counting
  int count = (aWord.length)-1;

   //proper grammer use in using times or time
  if(count==1)
  {
    JOptionPane.showMessageDialog(null,"\""+rd1+"\" was found.");

    //if found, delete from JTextArea
  }

  else
     {
     JOptionPane.showMessageDialog(null,"\""+rd1+"\" was not found.");
  }
 }

Anyone can help me?
Thanks in advance.

[sukatoa]

You can use replaceAll(String current,String newS) method....

Copy the content of that textArea....
Do the manipulation.
Replace the old content with the manipulated one....

I assumed no conditions

[Eku]

You can use
if(count==1)
{
JOptionPane.showMessageDialog(null,"\""+in1+"\" was found.");
YourTextArea.setText(null);
//if found, delete from JTextArea
}
Make sure to back up first.

[Eranga]

Make sure to back up first.

Cheers, a good point it is....