How to close current frame (Frame1) and open a new frame (Frame2) already created and pass the data to frame2 from frame1 on the clicking of button?
Use a CardLayout1. Either that or one JFrame and one or more JDialog2 instances.
How to Use CardLayout
How to Make Dialogs
The very best way to accomplish this, is very much told to you by #Andrew Thompson.
And the other way to accomplish, the motive of the question as described in the code. Here as you make object of your new JFrame, you have to pass the things you need in the other class as an argument to the other class, or you can simply pass the object(with this you be passing everything in one go to the other class)
A sample code for a bit of help :
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TwoFramesExample
{
public JFrame frame;
private JPanel panel;
private JButton button;
private JTextField tfield;
private SecondFrame secondFrame;
public TwoFramesExample()
{
frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
panel = new JPanel();
panel.setLayout(new BorderLayout());
tfield = new JTextField(10);
tfield.setBackground(Color.BLACK);
tfield.setForeground(Color.WHITE);
button = new JButton("NEXT");
button.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
// Here we are passing the contents of the JTextField to another class
// so that it can be shown on the label of the other JFrame.
secondFrame = new SecondFrame(tfield.getText());
frame.dispose();
}
});
frame.setContentPane(panel);
panel.add(tfield, BorderLayout.CENTER);
panel.add(button, BorderLayout.PAGE_END);
frame.pack();
frame.setVisible(true);
}
public static void main(String... args)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
new TwoFramesExample();
}
});
}
}
class SecondFrame
{
private JFrame frame;
private JPanel panel;
private JLabel label;
private JButton button;
private TwoFramesExample firstFrame;
public SecondFrame(String text)
{
frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
panel = new JPanel();
panel.setLayout(new BorderLayout());
label = new JLabel(text);
button = new JButton("BACK");
button.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
firstFrame = new TwoFramesExample();
frame.dispose();
}
});
frame.setContentPane(panel);
panel.add(label, BorderLayout.CENTER);
panel.add(button, BorderLayout.PAGE_END);
frame.pack();
frame.setVisible(true);
}
}
Hope this be of some help.
Regards
Related
Hello I am having a problem adding buttons to my GUI, I try to use BorderLayout to add the buttons but it does not show when I run. Since using BorderLayout my choice of background color reverts to white as well. Can anyone please help?
import javax.swing.*;
import java.awt.*;
public class BlackjackGUI{
private JFrame frame;
private JPanel panel;
private JButton newGameBtn, dealBtn, hitBtn, standBtn;
private JLabel playerMoneyLbl;
private JLabel playerCard1Lbl, playerCard2Lbl, playerCard3Lbl,
playerCard4Lbl, playerCard5Lbl, playerCard6Lbl, playerCard7Lbl;
private JLabel dealerCard1Lbl, dealerCard2Lbl, dealerCard3Lbl, dealerCard4Lbl,
dealerCard5Lbl, dealerCard6Lbl, dealerCard7Lbl;
private JLabel playerCardValueLbl, dealerCardValueLbl;
private JTextField betInputBox;
public BlackjackGUI(){
createForm();
addButtons();
frame.add(panel);
frame.setVisible(true);
}
public void createForm() {
JFrame frame = new JFrame("Blackjack");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(1200,800);
frame.setVisible(true);
JPanel panel = new JPanel();
Color c = new Color(0, 100, 0);
panel.setBackground(c);
panel.setLayout(new BorderLayout());
}
public void addButtons() {
newGameBtn = new JButton("New Game");
panel.add(newGameBtn, BorderLayout.NORTH);
}
public static void main(String[] args) {
new BlackjackGUI();
}
}
I am newbie to Java. My following code give me a blank window.
Anyone can help me with what is going on ?
I am thinking that the error is at the ActionListeners.
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setTitle("Listeners");
frame.setSize(400, 200);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.setLayout(new BorderLayout());
JTextArea txtArea = new JTextArea();
HelloActionListener hlisten = new HelloActionListener(txtArea);
JButton bl = new JButton("TOP");
bl.addActionListener((ActionListener) hlisten);
JButton b2 = new JButton("LEFT");
ActionListener rightListener = (ActionEvent e) -> {
txtArea.setText("Yes,let's go Left");
};
b2.addActionListener(rightListener);
JButton b3 = new JButton("RIGHT");
b3.addActionListener((ActionEvent e) -> {
txtArea.setText("Sorry, we cant go Right");
});
JButton b4 = new JButton("Bottom");
b4.addActionListener((ActionListener) hlisten);
frame.add(bl, BorderLayout.PAGE_START);
frame.add(b2, BorderLayout.LINE_START);
frame.add(b3, BorderLayout.LINE_END);
frame.add(b4, BorderLayout.PAGE_END);
frame.add(txtArea, BorderLayout.CENTER);
frame.setVisible(true);
}
Say you want to put "Hello" in your text area when the top button is pressed. Then you need to define your HelloActionListener as below:
private static class HelloActionListener implements ActionListener {
private JTextArea textArea;
public HelloActionListener(JTextArea textArea) {
this.textArea = textArea;
}
#Override
public void actionPerformed(ActionEvent e) {
textArea.setText("Hello");
}
}
The rest of your code is kind of messy but should work, however, you don't need to make the frame to be visible twice.
UPDATE
But I do think your code should be something like this:
public class MyApplication extends JFrame {
public MyApplication() {
setTitle("Listeners");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new BorderLayout());
JTextArea txtArea = new JTextArea();
HelloActionListener hlisten = new HelloActionListener(txtArea);
JButton bl = new JButton("TOP");
bl.addActionListener(hlisten);
JButton b2 = new JButton("LEFT");
ActionListener rightListener = e -> {
txtArea.setText("Yes,let's go Left");
};
b2.addActionListener(rightListener);
JButton b3 = new JButton("RIGHT");
b3.addActionListener(e -> {
txtArea.setText("Sorry, we cant go Right");
});
JButton b4 = new JButton("Bottom");
b4.addActionListener(hlisten);
add(bl, BorderLayout.PAGE_START);
add(b2, BorderLayout.LINE_START);
add(b3, BorderLayout.LINE_END);
add(b4, BorderLayout.PAGE_END);
add(txtArea, BorderLayout.CENTER);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> {
JFrame frame = new MyApplication();
frame.pack();
frame.setVisible(true);
});
}
private class HelloActionListener implements ActionListener {
private JTextArea textArea;
public HelloActionListener(JTextArea textArea) {
this.textArea = textArea;
}
#Override
public void actionPerformed(ActionEvent e) {
JButton button = (JButton) e.getSource();
textArea.setText("Hello from " + button.getText());
}
}
}
There is no need for the first frame.setVisible(true); in your code - you are calling that again right at the end. But your panels are all zero size. You need to call frame.pack(); before you set it visible. Note also that all of that (the GUI stuff) should be done from the Event Dispatch Thread, not from your main thread.
Hey everyone, I want to combine my classes and get it in
only one frame. Now I have 2 classes and I don't know how to group them.
The JSlider.
public class JSliderExample extends JFrame {
JSlider jsHorizontal;
JTextField jtf1;
public JSliderExample() {
jsHorizontal = new JSlider(JSlider.HORIZONTAL, 0, 100, 50);
jtf1 = new JTextField(15);
jtf1.setEditable(false);
jtf1.setText("Horizontal value is " + jsHorizontal.getValue());
JPanel panel = new JPanel();
panel.setBackground(Color.WHITE);
panel.add(jsHorizontal);
panel.setBackground(Color.WHITE);
panel.add(jtf1);
panel.setBackground(Color.WHITE);
getContentPane().add(panel, BorderLayout.CENTER);
getContentPane().add(panel, BorderLayout.SOUTH);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(300, 400, 400, 300);
setVisible(true);
setBackground(Color.WHITE);
}
class JSliderHandler implements ChangeListener {
public void stateChanged(ChangeEvent ce) {
jtf1.setText("value is " + jsHorizontal.getValue());
}
}
And there are my buttons
.
public void createGUI() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
panel.setLayout(new FlowLayout());
JButton button2 = new JButton("PLAY");
button2.setActionCommand("Button PLAY was pressed!");
panel.add(button2);
textField = new JTextField();
textField.setColumns(23);
panel.add(textField);
ActionListener actionListener = new TestActionListener();
button1.addActionListener(actionListener);
button2.addActionListener(actionListener);
button3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
textField.setText(e.getActionCommand());
}
});
getContentPane().add(panel);
setPreferredSize(new Dimension(320, 100));
}
public class TestActionListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
textField.setText(e.getActionCommand());
}
}
In the end of programm I see 2 frames that consist of 2 classes.
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
TestFrame frame = new TestFrame();
frame.pack();
JSliderExample frame1 = new JSliderExample();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
If you don't want to see 2 JFrames, then don't create 2 JFrames. Why not make JPanels with all your classes above and not JFrames, and then in your main method, add your JPanels to the JFrame created within main. Simple.
So for example, instead of having JSliderExample extend JFrame, change it's name to SliderPanel and have it extend JPanel, and likewise with your JButton program. Then your main method could look something like:
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
// your JSlider example class **that extends JPanel**
SliderPanel sliderPanel = new SliderPanel();
// your JButton example class **that extends JPanel**
ButtonPanel buttonPanel = new ButtonPanel():
JFrame frame = new JFrame("My GUI");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.add(sliderPanel, BorderLayout.PAGE_START);
frame.add(buttonPanel, BorderLayout.CENTER);
frame.pack();
frame.setLocationRelativeTo(null); // center GUI if you want
frame.setVisible(true);
}
});
}
In previos my questions I asked similar questions to this. But in my previous projects I used GUI builder, so now I would like to add JTextField to the Panel dynamically without Builder. I don't why but for some reason I cannot execute this code:
public class Reference {
JFrame frame = new JFrame();
JPanel MainPanel = new JPanel();
MainPanel main = new MainPanel();
JPanel SubPanel = new JPanel();
JButton addButton = new JButton();
JButton saveButton = new JButton();
private List<JTextField> listTf = new ArrayList<JTextField>();
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
new Reference();
}
public Reference() {
frame.add(main);
frame.setLayout(new BorderLayout());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(addButton, BorderLayout.EAST);
frame.add(saveButton, BorderLayout.WEST);
frame.pack();
frame.setSize(500, 300);
frame.setVisible(true);
main.setLayout(new BorderLayout());
main.setBackground(Color.green);
main.add(SubPanel);
SubPanel.setBackground(Color.yellow);
addButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt) {
main.add(new SubPanel());
main.revalidate();
}
});
saveButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt) {
for (int i = 0; i < main.getComponentCount();) {
SubPanel panel = (SubPanel)main.getComponent(i);
JTextField firstName = panel.getFirstName();
String text = firstName.getText();
System.out.println( text );
}}
});
}
private class SubPanel extends JPanel {
JTextField firstName = new JTextField(15);
public SubPanel() {
this.setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));
this.add(firstName);
listTf.add(firstName);
}
public JTextField getFirstName()
{
return firstName;
}
}
public class MainPanel extends JPanel
{
List<SubPanel> subPanels = new ArrayList<SubPanel>();
public MainPanel()
{
}
public void addSubPanel()
{
SubPanel panel = new SubPanel();
add(panel);
subPanels.add(panel);
}
public SubPanel getSubPanel(int index)
{
return subPanels.get(index);
}
}
}
And by saveButton trying to get value of JTextField, but without success. In output I can see just JFrame with 2 Buttons, but ActionListener of addButton and saveButton is not active. I cannot understand where is wrong.
Any help would be much appreciated.
In Swing, the order you do some things is very important, for example...
frame.add(main);
frame.setLayout(new BorderLayout());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(addButton, BorderLayout.EAST);
frame.add(saveButton, BorderLayout.WEST);
frame.pack();
frame.setSize(500, 300);
frame.setVisible(true);
You add main to your frame
You set the frames layout (!?)
You add your buttons
You pack the frame
You set it's size (!?)
You make it visible
The problem here is step #2. If, instead, we simply remove step #2 (step #4 and #5 aren't great either), you will find that your window now contains main...
frame.add(main);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(addButton, BorderLayout.EAST);
frame.add(saveButton, BorderLayout.WEST);
frame.pack();
frame.setVisible(true);
This...
for (int i = 0; i < main.getComponentCount();) {
SubPanel panel = (SubPanel) main.getComponent(i);
a bad idea of three reasons;
Your loop will never advance (i will always be 0)
You are blindly casting the contents of main without actually knowing what's on it
MainPanel already has a List of SubPanels...
You need to make sure that you are adding SubPanels via the addSubPanel method (and this should probably return an instance of the SubPanel) and provide a means by which you can access this List, maybe via a getter of some sort. Although, I'd be more interested in their values (ie the text field text) rather then the SubPanel itself ;)
I have a Swing window which contains a button a text box and a JLabel named as flag. According to the input after I click the button, the label should change from flag to some value.
How to achieve this in the same window?
Use setText(str) method of JLabel to dynamically change text displayed. In actionPerform of button write this:
jLabel.setText("new Value");
A simple demo code will be:
JFrame frame = new JFrame("Demo");
frame.setLayout(new BorderLayout());
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.setSize(250,100);
final JLabel label = new JLabel("flag");
JButton button = new JButton("Change flag");
button.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent arg0) {
label.setText("new value");
}
});
frame.add(label, BorderLayout.NORTH);
frame.add(button, BorderLayout.CENTER);
frame.setVisible(true);
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
import java.awt.event.*;
public class Test extends JFrame implements ActionListener
{
private JLabel label;
private JTextField field;
public Test()
{
super("The title");
setDefaultCloseOperation(EXIT_ON_CLOSE);
setPreferredSize(new Dimension(400, 90));
((JPanel) getContentPane()).setBorder(new EmptyBorder(13, 13, 13, 13) );
setLayout(new FlowLayout());
JButton btn = new JButton("Change");
btn.setActionCommand("myButton");
btn.addActionListener(this);
label = new JLabel("flag");
field = new JTextField(5);
add(field);
add(btn);
add(label);
pack();
setLocationRelativeTo(null);
setVisible(true);
setResizable(false);
}
public void actionPerformed(ActionEvent e)
{
if(e.getActionCommand().equals("myButton"))
{
label.setText(field.getText());
}
}
public static void main(String[] args)
{
new Test();
}
}