This question already has answers here:
The Use of Multiple JFrames: Good or Bad Practice? [closed]
(9 answers)
Closed 4 years ago.
I have a frame (main). There are two buttons: Items and Sale.
When I click button Items it opens a frame (Items)
and I want to, when I click on button Sale, it should close the Items and open Sale.
This is Items frame:
public class Items extends JFrame {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Items frame = new Items();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
}
UPDATE :- here is my sale class
public class Sale extends JFrame {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Sale frame = new Sale();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
}
Just close the previous Item JFrame with dispose() method.
salesframe.setVisible(true);
itemframe.dispose();
In your case, I think you should also add an ActionListener to the button.
jButton1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
frameToClose.dispose();
}
});
You should .dispose(); the frame in the ActionListener of the button and since you are extending JFrame in you class it means you .dispose(); the instance itself. Something like this:
public class Main extends JFrame {
public Main() {
Sale sale = new Sale();
Items item = new Items();
JButton btnSale = new JButton("Sale");
getContentPane().add(btnSale, BorderLayout.WEST);
JButton btnItems = new JButton("Items");
getContentPane().add(btnItems, BorderLayout.CENTER);
btnSale.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
sale.setVisible(true);
if(item.isVisible()) {
item.dispose();
}
}
});
btnItems.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
item.setVisible(true);
if(sale.isVisible()) {
sale.dispose();
}
}
});
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Main frame = new Main();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
}
Related
I have some problems with using dispose() method in my GUI project.
I' am making a GUI swing application for some kind of Elections in IntelliJ.
My problem is, by clicking a button(Confirm1, or 2 or 3) I want to open new JFrame which is checking the age of voter and closes the current JFrame where this button is located by calling dispose().
But frame.dispose(); doesn't work.
I have my JFrame declared in public static main().
Should I make reference for it in my ActionListener? I have been looking for solution, but I couldn't find any.
Here is a code:
import javax.swing.*; //another libraries
public class ElectionGUI {
private JPanel labelElection; // another texfields or etc.
private JButton Confirm1;
private JButton Confirm3;
private JButton Confirm2;
private JPanel Elections;
public VotesGUI(){
Votes votes = new Votes("...","...",0);
listX.addListSelectionListener(new ListSelectionListener() {
#Override
public void valueChanged(ListSelectionEvent e) {
if(!e.getValueIsAdjusting()){
NrX.setText(listX.getSelectedValue().toString());
}
}
});
listY.addListSelectionListener(new ListSelectionListener() {
#Override
public void valueChanged(ListSelectionEvent e) {
if(!e.getValueIsAdjusting()){
NrY.setText(listY.getSelectedValue().toString());
}
}
});
listZ.addListSelectionListener(new ListSelectionListener() {
#Override
public void valueChanged(ListSelectionEvent e) {
if(!e.getValueIsAdjusting()){
NrZ.setText(listZ.getSelectedValue().toString());
}
}
});
Confirm1.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
votes.VotesX();
votes.countVotes();
CheckAge age = new CheckAge();
age.Check(); /// referention, to my next //Jframe called psvm Check();
}
});
Confirm2.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
votes.VotesY();
votes.countVotes();
CheckAge age = new CheckAge();
age.Check();
}
});
Confirm3.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
votes.VotesZ();
votes.countVotes();
CheckAge age = new CheckAge();
age.Check();
}
});
}
public static void main(String[] args) {
JFrame frame = new JFrame("Elentions");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.setContentPane(new ElectionGUI().labelElection);
frame.pack();
}
}
I want to initialize a Graphical User Interface (GUI) for the user to input a form. After this is accomplished i want to open a new GUI, but as soon as the first GUI pops-up the next one is initialized to.
Is there any way to solve this without using waits and notifies?
here is an example of my code:
public static void main(String[] args) {
new GUIForm();
// wait until the user inputs the complete form
new GUIWelcome();
}
It is really simple I woild like to keep it that way.
Create an Interface OnActionListener
public interface OnActionListener {
public void onAction();
}
Add these code in GUIForm class
private OnActionListener listener;
private JButton action;
public GUIForm(OnActionListener listener) {
this.listener = listener;
action = new JButton("Action");
action.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
GUIForm.this.listener.onAction();
}
});
}
Now you can achieve that
new GUIForm(new OnActionListener() {
#Override
public void onAction() {
new GUIWelcome();
}
});
You need to use some sort pub/sub mechanism. This in a nutshell is what you need:
public class PubSub {
public static void main(String[] args) {
JFrame frame1 = new JFrame("GUIForm");
frame1.setSize(640, 480);
JButton button = new JButton("User Input");
JFrame frame2 = new JFrame("Welcome");
frame2.setSize(320, 240);
button.addMouseListener(new MouseAdapter() {
#Override
public void mouseEntered(MouseEvent e) {
button.setCursor(new Cursor(Cursor.HAND_CURSOR));
}
#Override
public void mouseExited(MouseEvent e) {
button.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
}
#Override
public void mouseClicked(MouseEvent e) {
frame2.setVisible(true);
}
});
frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame1.add(button);
frame1.setVisible(true);
}
}
This version uses JFrame's listeners, but you could implement your on callback mechanism to accomplish the same
I have 2 classes which extends Jframe. I would like to call the 2nd Jframe when button clicked and return back when close clicked. So on 1st JFrame I wrote this code
public void actionPerformed(ActionEvent e) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Lessons frameLessons = new Lessons();
frameLessons.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
But when I try to close the 2nd Jframe, the 1st also closes
Try this:
Lessons frameLessons = new Lessons();
frameLessons.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
frameLessons.setVisible(true);
I'm trying to use the MVC Pattern for the first time.
And I'm not sure if i do it the right way:
Main Class:
public class DBEditorMain
{
public static void main(String[] args)
{
DBEditorController control = new DBEditorController(new DBEditorView());
}
}
DBEditorController constructor:
public DBEditorController(DBEditorView view)
{
this.view = view;
addListeners ();
view.setVisible (true);
}
DBEditorController addListeners():
private void addListeners()
{
view.addWindowListener (new WindowAdapter ()
{
#Override
public void windowClosing(WindowEvent e)
{
terminate ();
}
});
view.addActionListeners (this);
}
DBEditorView Constructor:
public DBEditorView()
{
super ("Database");
setSize (800, 600);
setResizable (false);
initGUI ();
}
DBEditorView addActionListeners():
public void addActionListeners(ActionListener l)
{
closeButton.setActionCommand ("close");
saveButton.setActionCommand ("save");
closeButton.addActionListener (l);
saveButton.addActionListener (l);
}
DBEditorController actionPerformed():
#Override
public void actionPerformed(ActionEvent e)
{
switch (e.getActionCommand ())
{
case ("save"):
save();
break;
case ("close"):
terminate();
break;
}
}
I think i did it right since the View and Model (not implemented yet) have no references to the Controller or to each other.
Is this a good start or have I missed something.
I know this is a dumb "question" ._.
I'm trying to figure out why the text field isn't updating. I'm aware that using SwingWorker will probably fix this problem, but I can't understand why it doesn't work in the first place.
public class waitExample {
private JFrame frame;
private JTextField txtLeadingText;
private String one = "update string 1";
private String two = "update string 2";
private String three = "update string 3";
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
waitExample window = new waitExample();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public waitExample() {
initialize();
}
private void initialize() {
frame = new JFrame();
frame.setBounds(100, 100, 450, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
txtLeadingText = new JTextField();
txtLeadingText.setHorizontalAlignment(SwingConstants.CENTER);
txtLeadingText.setText("leading text");
frame.getContentPane().add(txtLeadingText, BorderLayout.SOUTH);
txtLeadingText.setColumns(10);
JButton btnClickMeTo = new JButton("CLICK ME TO UPDATE TEXT");
btnClickMeTo.addMouseListener(new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent arg0) {
try {
updateOne();
Thread.sleep(1000);
updateTwo();
Thread.sleep(1000);
updateThree();
Thread.sleep(1000);
updateLast();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
frame.getContentPane().add(btnClickMeTo, BorderLayout.CENTER);
}
private void updateOne() {
txtLeadingText.setText(one);
}
private void updateTwo() {
txtLeadingText.setText(two);
}
private void updateThree() {
txtLeadingText.setText(three);
}
private void updateLast() {
txtLeadingText.setText("default text");
}
}
From what I understand, the default Thread will prevent any GUI updates. That shouldn't matter because I am setting the textField BEFORE the Thread.sleep.
Why doesn't the text field update? Shouldn't the text be set, then the Thread wait?
EDIT: As per the answers, the above code has been updated.
You are invoking Thread.sleep(1000); on EDT. This means that when your method will end - only then the repaint() will fire (at some point in time later).
Until then your GUI is freezed.
Consider that this is going on one thread (so processing is straightforward):
txtLeadingText.setText(one);
Thread.sleep(1000);
txtLeadingText.setText(two);
Thread.sleep(1000);
txtLeadingText.setText(three);
Thread.sleep(1000);
...
<returning from updateText()>
<processing other events on button click>
...
// some time later
<Swing finds out that GUI needs repaint: calls rapaint()>
This is what you should do (I didn't compile or test it):
public class MyRunnable implements Runnable {
private List<String> strsToSet;
public MyRunnable(List<String> strsToSet) {
this.strsToSet = strsToSet;
}
#Override
public void run() {
try {
if(strsToSet.size() > 0) {
final String str = strsToSet.get(0);
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
txtLeadingText.setText(str);
}
});
Thread.sleep(1000);
List<String> newList = new LinkedList<String>(strsToSet);
newList.remove(0);
new Thread(new MyRunnable(newList)).start();
}
}
catch(InterruptedException e) {
e.printStackTrace();
}
}
}
new Thread(new MyRunnable(Arrays.asList(one, two, three))).start();
It is hard to do in Swing but in contrast in dynamically languages (like Groovy) it would go as simple as that (you'll get a better grasp of what is going on):
edt {
textField.setText(one)
doOutside {
Thread.sleep(1000);
edt {
textField.setText(two)
doOutside {
Thread.sleep(1000);
edt {
textField.setText(three)
}
}
}
}
}
The GUI event loop updates the screen, but it can't update the screen until you return.
I suggest you avoid doing any blocking operations in the GUI event thread.