Validating the save process

Question

Hello,
I have a question, I wanted to prompt to save a document or an application only when the JTextPane value has changed, I am currently doing like this
if(JTextPane1().getText().length() > 0)
// doing the required stuff here
// call the method exitA() method
and when I close the JFrame I am calling this method
public void windowClosing(WindowEvent e)
                    if(e.getSource() == Test1.this)
                         exitA();
This results me to prompt for exitA() method when I close the application, but before I prompt this, I need to check whether the application has changed or not, if not changed the simply exit the application, if changed then only show him the exitA() method.
Thanks for any help.
James

Answer 1

This will tell you if your textpane is empty or not and if the value has changed.
this program only checks the values(apply it to your application on windowclosing). the methods you may need is checkValue() and checkCValue()
You can improve this
import javax.swing.*;
import java.awt.event.*;
public class TestAll extends JFrame implements ActionListener
     private JPanel panel = new JPanel();
     private JTextPane jtpane = new JTextPane();
     private JTextPane jtpaneorig = new JTextPane();
     private JButton jb = new JButton("Verify");
TestAll()
     super();
     panel.add(jtpane);
     panel.add(jb);
     jb.addActionListener(this);
     panel.setVisible(true);
     jtpane.setText("It has Value");
     jtpaneorig.setText(jtpane.getText());
     this.getContentPane().add(panel);
     setSize(200,200);
public void actionPerformed(ActionEvent ae)
     if (checkValue(jtpane))
          // save it
          System.out.println(jtpane.getText());
     else
          // exit
          System.out.println("No Value");
     if (checkCValue())
          //save
          System.out.println("Values has changed");
     else
          //dont save
          System.out.println("Value has not changed");
// check if textpane as value or not
public boolean checkValue(JTextPane jtp)
     // get the text as string the removes all the white space & checks the length
     if(((jtp.getText()).trim()).length() > 0)
       return true;
     else
          return false;
//check if the value has changed
public boolean checkCValue()
     if(((jtpane.getText()).trim()).equals((jtpaneorig.getText()).trim()))
       return false;
     else
          return true;
public static void main(String[] args)
  TestAll ta = new TestAll();
  ta.setVisible(true);
}