Make 2 JFrames work one after the other

Question

Hello,
I have JFrame with a button and after a clicking on that it opens a new JFrame which takes inputs from user and saves them in a file;Until I finish the file writing in second frame, the user should not be able to edit anything in first frame,frame should be visible.The code for creating the frames is:
import javax.swing.JFrame;
import javax.swing.JButton;
public class FrameTest extends JFrame{
     private JButton button=new JButton("Click");
     public FrameTest() {
          button.addActionListener(new java.awt.event.ActionListener(){
               public void actionPerformed(java.awt.event.ActionEvent ae){
               new ChildFrame();     
          getContentPane().add(button);
          pack();
          setVisible(true);
     public static void main(String args[]){
          new FrameTest();
import java.awt.Event;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JTextField;
public class ChildFrame extends JFrame {
     JButton button=new JButton("Save");
     JTextField name=new JTextField(10);
     java.io.FileOutputStream fout;
     public ChildFrame() {
          button.addActionListener(new java.awt.event.ActionListener(){
               public void actionPerformed(java.awt.event.ActionEvent ae){
                    try{
                         fout=new java.io.FileOutputStream("c:/TestFile.txt");
                         fout.write(name.getText().getBytes());
                         fout.close();
                    catch(java.io.FileNotFoundException fnf){
                    catch(java.io.IOException ioe){
          getContentPane().setLayout(new java.awt.FlowLayout());
          getContentPane().add(name);
          getContentPane().add(button);
          pack();
          setVisible(true);
}

Answer 1

You can add a boolean variable (initialized to false) to the child frame that holds true once the file operation is complete. Let's say we call it: FileTransferComplete=false;
fout=new java.io.FileOutputStream("c:/TestFile.txt");
fout.write(name.getText().getBytes());
fout.close();
FileTransferComplete=true;
/code]
you can add a method to the child frame to return this status
and set the main frame's setVisible property to this value likethis.setVisible(ChildFrame.isFileTransferComplete());
You'll probably have to cater for the likely scenario that a IO exception is called in which case FileTransferComplete never becomes true.