如何从私有void JButton返回公共String的新值？

Question

I have a public String in one class and is to be used by other classes. The value of this String can only be acquired with the use of a JButton . My code seems right but still I only get null returned from the button.

Below is my class containing the public String variable and the code for the JButton :

public class Seminar_Menu extends javax.swing.JFrame {
    Connection conn = null;
    ResultSet rs = null;
    PreparedStatement ps = null;
    // Public String mentioned in quesiton
    public String Seminar_Choosen;
    ......

    //Button Code
    private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        Conduct_Seminar consem = new Conduct_Seminar();
        Seminar_Menu semen = new Seminar_Menu();

        String message = "Conduct this seminar?";
        String title = "Conduct";
        int reply = 
           JOptionPane.showConfirmDialog(null, message, title, JOptionPane.YES_NO_OPTION);

        if (reply == JOptionPane.YES_OPTION)
        {

            Seminar_Choosen = Title_Field.getText();

            consem.setVisible(true);
            semen.setVisible(false);
        }    
    }

   ......

}

I'm using JFrame Form by the way in Netbeans. Is there any other way of returning the value of Seminar_Choosen ?

Answer 1

public class Example {
  public static class myAction extends AbstractAction {
    String val;
    public myAction(String val) {
      this.val = val;
    }
    public void ActionPerformed(ActionEvent ae) {
      System.out.println("value: " + val);
    }
}

Then

JButton = new JButton(new Example(myString));