Closing a form from another one

[AlexanderPD]

Hi, using the netbeans Gui builder i made 2 form, "a" and "b"



If i need to close form "a" from "a" i simply need to use:

this.setVisible(false);



it works! :D

but now i need to close "a" from "b" :|

using a.setVisible(false); makes an "non-static method setVisible(boolean) cannot be referenced from a static context" :(



How can i close "a" from "b"? :(



thank you :)

[Bayless Kirtley]

Sounds like you are calling setVisible() from a static method. You can't do
that.

Bayless

----- Original Message -----
From: "AlexanderPD" <pdalex@...>
To: <nbusers@...>
Sent: Friday, July 03, 2009 10:14 AM
Subject: [nbusers] Closing a form from another one

> Hi, using the netbeans Gui builder i made 2 form, "a" and "b"
>
>
>
> If i need to close form "a" from "a" i simply need to use:
>
> this.setVisible(false);
>
>
>
> it works! :D
>
> but now i need to close "a" from "b" :|
>
> using a.setVisible(false); makes an "non-static method setVisible(boolean)
> cannot be referenced from a static context" :(
>
>
>
> How can i close "a" from "b"? :(
>
>
>
> thank you :)
>
>
>
>

[Jeffrey H. Coffield]

AlexanderPD wrote:

> Hi, using the netbeans Gui builder i made 2 form, "a" and "b"
>
>
>
> If i need to close form "a" from "a" i simply need to use:
>
> this.setVisible(false);
>
>
>
> it works! :D
>
> but now i need to close "a" from "b" :|
>
> using a.setVisible(false); makes an "non-static method setVisible(boolean) cannot be referenced from a static context" :(
>
>
>
> How can i close "a" from "b"? :(
>
>
>
> thank you :)
>
>
> .
>

Somewhere you are creating form a and form b. I assume something like a
formA = new a(); and b formB = new b();. So you need to
get formA into formB so it can reference the real object, not just it's
class. If b is being created by a then you could modify b to have a
constructor method of b(a formA). Then in a you could have b formB = new
b(this). Then in b you can save off the formA and when needed do a
formA.setVisible(false);

Without seeing more of your code, this is only a guess.

Jeff Coffield
www.digitalsynergyinc.com

[AlexanderPD]

thank you for the answer :D



i don't think i can do that :(

my classes starts with:



public class a extends javax.swing.JFrame

and

public class b extends javax.swing.JFrame

(netbeans gui builder auto-generate that), so they both extends JFrame :(

[Jeffrey H. Coffield]

AlexanderPD wrote:

> thank you for the answer :D
>
>
>
> i don't think i can do that :(
>
> my classes starts with:
>
>
>
> public class a extends javax.swing.JFrame
>
> and
>
> public class b extends javax.swing.JFrame
>
> (netbeans gui builder auto-generate that), so they both extends JFrame :(
>
>
> .
>
>

That doesn't prevent you from adding a new method with a parameter or
adding a method to b that will store a reference to a that can then be
called to set setVisble to false.

There may be a better way to do this, and if someone else has an idea,
I'd also like to know.

Jeff Coffield

Jeff

[djohnson-2]

You could do it with events. Add one form as an ActionListener to the
other form. When you want the other form to set the first one
visible/invisible (or do anything else) fire an event to the listener
telling it what you want it to do.

HTH

David Johnson

On Sat, 2009-07-04 at 13:08 -0700, Jeffrey H. Coffield wrote:

>
> AlexanderPD wrote:
> > thank you for the answer :D
> >
> >
> >
> > i don't think i can do that :(
> >
> > my classes starts with:
> >
> >
> >
> > public class a extends javax.swing.JFrame
> >
> > and
> >
> > public class b extends javax.swing.JFrame
> >
> > (netbeans gui builder auto-generate that), so they both extends JFrame :(
> >
> >
> > .
> >
> >
> That doesn't prevent you from adding a new method with a parameter or
> adding a method to b that will store a reference to a that can then be
> called to set setVisble to false.
>
> There may be a better way to do this, and if someone else has an idea,
> I'd also like to know.
>
> Jeff Coffield
>
> Jeff
>

[AlexanderPD]

djohnson wrote:
> You could do it with events. Add one form as an ActionListener to the

> other form. When you want the other form to set the first one

> visible/invisible (or do anything else) fire an event to the listener

> telling it what you want it to do.

>

> HTH

>

> David Johnson

>

> On Sat, 2009-07-04 at 13:08 -0700, Jeffrey H. Coffield wrote:

>
> >

> > AlexanderPD wrote:

> >
> > > thank you for the answer :D

> > >

> > >

> > >

> > > i don't think i can do that :(

> > >

> > > my classes starts with:

> > >

> > >

> > >

> > > public class a extends javax.swing.JFrame

> > >

> > > and

> > >

> > > public class b extends javax.swing.JFrame

> > >

> > > (netbeans gui builder auto-generate that), so they both extends JFrame :(

> > >

> > >

> > > .

> > >

> > >

> > >
> > That doesn't prevent you from adding a new method with a parameter or

> > adding a method to b that will store a reference to a that can then be

> > called to set setVisble to false.

> >

> > There may be a better way to do this, and if someone else has an idea,

> > I'd also like to know.

> >

> > Jeff Coffield

> >

> > Jeff

> >
>




i tryed that.. without any success :(

i'll post the first class:




Code:
package progettoos;



public class a extends javax.swing.JFrame {



    public a() {

        initComponents();

    }

    @SuppressWarnings("unchecked")

    // <editor-fold defaultstate="collapsed" desc="Generated Code">

    private void initComponents() {



        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);



        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());

        getContentPane().setLayout(layout);

        layout.setHorizontalGroup(

            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

            .addGap(0, 400, Short.MAX_VALUE)

        );

        layout.setVerticalGroup(

            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

            .addGap(0, 300, Short.MAX_VALUE)

        );



        pack();

    }// </editor-fold>



    public static void main(String args[]) {

        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {

                new a().setVisible(true);

            }

        });

    }

    // Variables declaration - do not modify

    // End of variables declaration

}







it's a totally empty interface, and if i try to use the "a.setvisible(false)" or "a.dispose" i get the "non-static method cannot be referenced from a static context", ever if i type it just after the initComponents();

it works if i use this.setVisible(false) or this.dispose(), but not if i write it in a static method..

so, how i can close it from another jframe or another class?

[Jeffrey H. Coffield]

AlexanderPD wrote:
>
> i tryed that.. without any success :(
>
> i'll post the first class:
>

I still don't understand exactly what you are trying to do but here is
one possible (and probably not the best) way:


/*
 * a.java
 *
 * Created on Jul 13, 2009, 6:36:33 AM
 */

package javaapplication4;

/**
 *
 * @author jeffrey
 */
public class a extends javax.swing.JFrame {

    /** Creates new form a */
    public a() {
        initComponents();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated
Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        jButton1 = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jButton1.setText("jButton1");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jLabel1.setText("a");

        javax.swing.GroupLayout layout = new
javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(

layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()

.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(164, 164, 164)
                        .addComponent(jLabel1))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(134, 134, 134)
                        .addComponent(jButton1)))
                .addContainerGap(178, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(

layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(35, 35, 35)
                .addComponent(jLabel1)
                .addGap(73, 73, 73)
                .addComponent(jButton1)
                .addContainerGap(152, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt)
{//GEN-FIRST:event_jButton1ActionPerformed
        // Here is the main change
        b bform = new b(this);
        bform.setVisible(true);

    }//GEN-LAST:event_jButton1ActionPerformed

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new a().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    // End of variables declaration//GEN-END:variables

}


/*
 * b.java
 *
 * Created on Jul 13, 2009, 6:39:11 AM
 */

package javaapplication4;

/**
 *
 * @author jeffrey
 */
public class b extends javax.swing.JFrame {

    private a aframe;

    /** Creates new form b */
    public b() {
        initComponents();
    }

// This is the main part I added to get a reference to a from b
    public b(a newAframe) {
        aframe = newAframe;
        initComponents();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated
Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        jButton1 = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jButton1.setText("jButton1");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jLabel1.setText("b");

        javax.swing.GroupLayout layout = new
javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(

layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()

.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(117, 117, 117)
                        .addComponent(jButton1))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(137, 137, 137)
                        .addComponent(jLabel1)))
                .addContainerGap(195, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(

layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(29, 29, 29)
                .addComponent(jLabel1)
                .addGap(67, 67, 67)
                .addComponent(jButton1)
                .addContainerGap(164, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt)
{//GEN-FIRST:event_jButton1ActionPerformed
        if (aframe != null) {
            aframe.setVisible(false);
        }
    }//GEN-LAST:event_jButton1ActionPerformed

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new b().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    // End of variables declaration//GEN-END:variables

}