I have a main jFrame with the help of which i press button and open new JFrames but the problem is that when i open other JFrame the previous ones still remains there where as what i want is that when i press next button then i move forward to the new JFrame (the previous one should not be there) and when i press previous button i move back to the previous JFrame.
I know there are functions of dispose,they do well like jframe1.dispose() but i dont get it how to hide the very first JFrame whose code in the main is written like this
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run()
{
new GraphicalInterface().setVisible(true);
}
});
}
how do i set this as .setVisible(false) in the button code?
You need to retain a reference to the JFrame, so you can set it's visibility later.
private JFrame myFrame;
public void run() {
myFrame = new GUI();
myFrame.setVisible(true);
}
public void hide() {
myFrame.setVisible(false);
}
Note that a JFrame is a top-level container, you are only really supposed to have one per application. It may be better if instead of using multiple JFrames you use just one, and swap in various JPanels instead.
It would safe resources if you keep just one frame and set a new panel as content.
Your question was how to handle the reference to the frame? Please provide the code where the next frame is created.
You could assign your GUI (extends JFrame I suppose) to a variable and call .setVisible(false) on that object. Since your object from the code above is more or less anonymous, you won't have access on that.
You could also check this.
Related
The situation is as follows:
My app consists of a dialog box containing x elements and a button. The user presses button after interacting with elements and if he interacted them with a specific way, only then the parent frame in which the Dialog Box resides should appear.
For this purpose, I currently know of this approach:
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(false);
jDialog.setVisible(true);
}
});
}
And then add this command on Button which resides inside jDialog:
new NewJFrame().setVisible(true);
This does the trick quite well and neat, but the previous instance called using new NewJFrame().setVisible(false); is still running (as far as I know).
Isn't there anyway I could perform this action on button (residing inside jDialog) press as using something like:
NewJFrame.setVisible(true);
(It currently gives me error: Non-static method cannot be referenced from static context)
Make sure that the dialog is modal, and you can simply do:
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
NewJFrame newJFrame = new NewJFrame();
newJFrame.pack();
// no need to set visible false. It already is
MyDialog myDialog = new MyDialog(newJFrame);
// make sure the super constructor makes the dialog modal
myDialog.pack();
myDialog.setVisible(true);
// here the dialog is no longer visible
// and we can extract data from it and send it to the JFrame if needed
newJFrame.setVisible(true); // ****** here
}
});
}
Otherwise if you absolutely must fiddle with the JFrame from within the JDialog, simply pass the NewJFrame into the JDialog's constructor, something that you need to do regardless since it should be used in the JDialog super constructor, use it to set a NewJFrame field, and call setVisible(true) on the instance inside of your dialog.
I'm using the Java GUI for the first time through Netbeans. I'm trying to design some basic hotel software, and for that I'm trying to implement multiple screens through multiple JFrames.
What I don't know is how to get the jFrame I'm using to go invisible and another jFrame to go visible when a button in my current jFrame is clicked.
I have a class, Hotel with this code:
public static void main(String[] args) {
// TODO code application logic here
HotelMain h = new HotelMain();
HotelBooking b = new HotelBooking();
h.setVisible(true);
}
HotelMain and HotelBooking are 2 separate jFrame files. I'm trying to get HotelMain to disappear and HotelBooking to appear when a button is clicked on the HotelMain screen.
And this is some code from the main function in HotelMain. Should this even be there? Also, how do I use this to get the jFrame to disappear?
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new HotelMain().setVisible(true);
}
}
I am make a project on cars. How can I make distributor frame popup and cars frame not visible and close automatic? Kindly send any solution in simple and effective way.
I have done coding this way:-
{
Cars frm1=new Cars();
Distributor frm2=new Distributor();
frm2.setVisible(true);
frm1.setVisible(false);
frm1.setDefaultCloseOperation(frm1.DISPOSE_ON_CLOSE);
}
".Please help me to how I can make distributor frame popup and cars frame is not visible and close automatic."
Ok so in Netbeans GUI Builder, you may want to do the following (this is assuming you have created two separate JFrame form files
In the frame that is the launching program (we'll call it MyFrame1) add a button to it (we'll call it jButton1)
Add a listener to the button, then the following code should be auto-generated
public void jButton1ActionPerforemd(javax.swing.ActionEvent evt) {
}
In that actionPerformed, just instantiate the second frame (we'll call it MyFrame2) and setVisible(false) to MyFrame1. MyFrame2 should already be visible upon instantiation, so you wouldn't have to setVisisble(true) on it
public void jButton1ActionPerforemd(javax.swing.ActionEvent evt) {
MyFrame2 frame2 = new MyFrame2();
MyFrame1.this.setVisible(false);
// You can also use MyFrame1.this.dispose(); dependind if you ever need to use that frame again
}
I think this should work
you need to setVisible Jframe2 as true...so it can apear on output sceen
public void jButton1ActionPerforemd(javax.swing.ActionEvent evt)
{
myFrame2 frame2=new myframe2();
myframe1.this.setVisible(false);
frame2.setVisible(true);
}
create action event for the button such that when when you click will take
you
to the next page for my case next page is nextjFrame
private void nextButtonActionPerformed(java.awt.event.ActionEvent evt) {
setVisible(false);
nextjFrame ob=new nextjFrame();
ob.setVisible(true);
}
private void BTNConvertActionPerformed(java.awt.event.ActionEvent evt) {
/*
This is the action performed event for my Button "BTNConvert"
*/
java.awt.EventQueue.invokeLater
(new Runnable()
{
public void run()
{
new JFrame2().setVisible(true);
}
});
/*
This will set the second Frame Visible.
*/
JFrame1.this.setVisible(false);
/*
This should set the first frame invisible or whatever. Any other code should be
written before the curly brace below.
*/
}
//You're Welcome.
I have class main extends jframe, it has a button that calls /shows another class that extends jdialog.
If the button from jdialog is triggered, it will dispose that dialog and will remove all component of jframe, then add it to a new jpanel.
What should I do?
Here's my new broken code:
public class mainz extends JFrame{
mainz(){
setVisible(true);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
JToolBar r = new JToolBar();
r.add(Box.createHorizontalGlue());
add(r, BorderLayout.NORTH);
JButton n = new JButton();
r.add(n, BorderLayout.EAST);
n.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae){
show();
}
});
}
public void show(){
dialogz d = new dialogz(this);
d.setVisible(true);
}
public void lastHope(){
getContentPane().removeAll();
getContentPane().validate();
getContentPane().repaint();
}
public static void main (String[]args){
new mainz().setExtendedState(MAXIMIZED_BOTH);
}
}
public class dialogz extends JDialog{
public dialogz(final mainz owner) {
setSize(300, 300);
JButton n = new JButton("execute");
add(n);
final JFrame ew = (JFrame)super.getOwner();// <<
n.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae){
dispose();
//owner.lastHope;
ew.removeAll();// <<
ew.validate();// <<
ew.repaint();// <<
}
});
}
void yes(){
getOwner().removeAll();
getOwner().validate();
getOwner().repaint();
}
}
I know I can prevent my main class from extending jframe, and call it from main instead, but I want to do it like that...
Please help me ... T-T
Sorry for my English, I from a far away country ~,~"
update:
the error is
java.lang.ClassCastException: javax.swing.SwingUtilities$SharedOwnerFrame cannot be cast to javax.swing.JFrame
it will be done with delete the line that contain
// <<
then call lastHope();
but i think there's a another way to get that existing jframe to removeall
(by casting it first or something ~,~" )
You are calling getParent() but you never set the parent (or owner). That should happen in the constructor as already pointed out. Also, be mindful that getParent() returns a Container object and getOwner() returns a Window object. Both of these refer to the JFrame which is the parent and owner. If you want to use it as a JFrame, you'll have to cast the output as (JFrame). But removeAll() is in Container class so if that's all you want, there'll be no need for casting.
Update:
JFrame frame = new JFrame();
JDialog dialog = new JDialog(frame);//frame is owner
JFrame parentOfDialog = (JFrame)(dialog.getParent());
//OR
//JFrame parentOfDialog = (JFrame)(dialog.getOwner());
parentOfDialog.removeAll();
If you are using your custom class, pass JFrame in the constructor and call super.
Please read the javadoc on JDialog before you try to use it. Also, read more about inheritance.
I'm not clear on what your goal is, but if you want to change the components that are displayed in a container, such as a JFrame or JDialog's contentPane, then I recommend that you use a CardLayout to do this since it allows you to easily swap "views".
There could be two ways to do this:
Your JDialog class could use a reference to the JFrame that is passed in via its constructor (and you should then pass it immediately into the dialog's super constructor so that your modality will work correctly). You could then call any public methods in the JFrame's class.
Or since the JDialog is modal, the JFrame's code will halt while the dialog is visible. You could swap "views" immediately after the dialog has been disposed of and is no longer visible. this would keep the JFrame manipulating code in the JFrame class.
Edit: note that if you don't use CardLayout, then you're responsible for calling revalidate() and repaint() on any container who gets its components changed.
As an aside: since English is not your first tongue and nor is it the native language of many folks on this forum, please avoid using non-standard abbreviations. The clearer your communication with us, the easier it will be for us to understand you and help you.
Example:
public class JFrameTest {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
JFrame frame = new JFrame();
JButton button = new JButton("Hello!");
frame.getContentPane().add(button);
frame.getContentPane().add(button);
frame.pack();
frame.setVisible(true);
frame.setLocationRelativeTo(null);
}
});
}
}
In the above example 'button' object is added only once even though there are no errors. The reason why I ask this is, I would like to add a same JPanel object on JFrame and on JDialog (on some table double click for edit/delete feature). I am able to solve it by having two JPanel objects but just wanted to know why it is not possible.
You can only add Swing components once in the Swing hierarchy as you already found out. This is documented in the 'Using top-level components tutorial'
Each GUI component can be contained only once. If a component is already in a container and you try to add it to another container, the component will be removed from the first container and then added to the second.
Not completely sure whether there were technical limitations that let to this decision, but I could imagine that for example the getParent method would give strange results if you were able to add the same component to two Containers