I want to create a button with checkbox in the right side of it.
i tried this but checkbox stays on the center of button on the top of button label text.
Any ideas welkom.
thanks in advance:
public class MainTest extends JPanel {
JButton button;
JPanel panel;
public MainTest() {
createComponents();
layoutComponents();
}
public void createComponents() {
// attempting to add checkbox to button
button = new JButton("Print with Edge");
JCheckBox checkBox = new JCheckBox();
jcb.setHorizontalAlignment(SwingConstants.RIGHT);
button.add(checkBox,new BorderLayout());
panel = new JPanel(new BorderLayout());
}
public void layoutComponents() {
panel.add(button,BorderLayout.SOUTH);
add(panel);
}
public static void main(String[] args) {
MainTest demo = new MainTest();
JFrame frame = new JFrame();
Container cp = frame.getContentPane();
cp.add(demo);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(500, 500);
frame.setLocation(500, 500);
frame.setVisible(true);
}
}
You can wrap a JCheckBox inside a JPanel and make the JPanel look like a button. For example:
public class Test {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setSize(new Dimension(100, 100));
JCheckBox button = new JCheckBox();
final JPanel buttonWrapper = new JPanel();
buttonWrapper.add(new JLabel("Button Text"));
buttonWrapper.add(button);
buttonWrapper.setBorder(BorderFactory.createRaisedBevelBorder());
buttonWrapper.addMouseListener(new MouseAdapter() {
#Override
public void mousePressed(MouseEvent me) {
buttonWrapper.setBorder(BorderFactory.createEtchedBorder());
}
#Override
public void mouseReleased(MouseEvent me) {
buttonWrapper.setBorder(BorderFactory.createRaisedBevelBorder());
}
#Override
public void mouseClicked(MouseEvent me) {
System.out.println("mouse clicked");
}
});
JPanel mainPanel = new JPanel();
mainPanel.add(buttonWrapper);
frame.getContentPane().add(mainPanel);
frame.setVisible(true);
}
}
I want to create a button with checkbox in the right side of it.
Maybe you just want the checkbox on the right side of the text?
If so you can do:
JCheckBox cb = new JCheckBox("Print with Edge");
cb.setHorizontalTextPosition(SwingConstants.LEADING);
Related
I'm getting an AWT-EventQueue-0 Null Pointer Exception in the below code and I can't get to fix it.
I want to have a main frame, from which by pressing a button
I open a second frame, where I have the option to create new players,
which would show up in the main frame.
I passed the references to the constructors, but I still keep getting the error.
I would be very happy for some help, thanks!
public class Main {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
new App();
}
});
}
}
public class App extends JFrame {
private MainPanel mainPanel;
private SecondPanel secondPanel;
public App() {
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(800, 600);
secondPanel = new SecondPanel(mainPanel);
mainPanel = new MainPanel(secondPanel);
add(mainPanel);
}
}
public class MainPanel extends JPanel {
private JTextArea textArea;
private JScrollPane scrollPane;
private JButton options;
public MainPanel(SecondPanel secondPanel) {
textArea = new JTextArea();
textArea.setColumns(20);
textArea.setRows(5);
textArea.setSize(300, 300);
textArea.setVisible(true);
textArea.setEditable(false);
scrollPane = new JScrollPane(textArea);
scrollPane.setSize(new Dimension(400, 400));
options = new JButton("Options");
options.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
secondPanel.setVisible(true);
}
});
add(scrollPane);
add(options);
}
public JTextArea getTextArea() {
return textArea;
}
public void setTextArea(JTextArea textArea) {
this.textArea = textArea;
}
}
public class SecondPanel extends JFrame {
private JButton create, remove;
private JPanel panel;
public SecondPanel(MainPanel mainPanel) {
setVisible(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(400, 400);
panel = new JPanel();
panel.setLayout(new BorderLayout());
create = new JButton("create");
create.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
mainPanel.getTextArea().append("New Player Created");
}
});
remove = new JButton("remove");
remove.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
mp.getTextArea().setText("Player removed");
}
});
add(panel);
panel.add(create, BorderLayout.EAST);
panel.add(remove, BorderLayout.WEST);
}
}
Well, it has to be "null", because you don't initialise your MainPanel before you hand it over to the secondPanel.
Instead, make an own method for setting the MainPanel on the secondPanel and to set the secondPanel on the MainPanel.
I see that you need the secondPanel for instance in your constructor to set an ActionListener. Do that in your "setSecondPanel(SecondPanel sPanel)"-Method which, as I mentioned before, you should create.
I've created 3 buttons. They are each displayed twice in a JFrame. I'm having trouble changing the background of the frame. I've set ActionListeners but upon clicking, nothing is changing. May I ask for some help.
public class MyButtons extends JPanel {
public static JFrame frame;
private JButton Red = new JButton("Red");
private JButton Green = new JButton("Green");
private JButton Blue = new JButton("Blue");
public void InitializeButton()
{
Blue.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
frame.setBackground(Color.BLUE);
}
});
Green.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
frame.setBackground(Color.GREEN);
}
});
Red.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
frame.setBackground(Color.RED);
}
});
}
public MyButtons() {
InitializeButton();
add(Red);
add(Green);
add(Blue);
}
public static void main(String[] args) {
frame = new JFrame();
JPanel row1 = new MyButtons();
JPanel row2 = new MyButtons();
row1.setPreferredSize(new Dimension(250, 100));
row2.setPreferredSize(new Dimension(250, 100));
frame.setLayout(new GridLayout(3,2));
frame.add(row1);
frame.add(row2);
frame.pack();
frame.setVisible(true);
}
}
This code works, but probably not as you expected:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MyButtons extends JPanel {
//public static JFrame frame;
// static is rarely a solution of problems in a GUI. ToDo! Change!
static JPanel ui = new JPanel(new GridLayout(2, 0, 20, 20));
private JButton Red = new JButton("Red");
private JButton Green = new JButton("Green");
private JButton Blue = new JButton("Blue");
public void InitializeButton() {
Blue.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
ui.setBackground(Color.BLUE);
}
});
Green.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
ui.setBackground(Color.GREEN);
}
});
Red.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
ui.setBackground(Color.RED);
}
});
}
public MyButtons() {
InitializeButton();
add(Red);
add(Green);
add(Blue);
}
#Override
public Dimension getPreferredSize() {
return new Dimension(250, 100);
}
public static void main(String[] args) {
JFrame frame = new JFrame();
JPanel row1 = new MyButtons();
JPanel row2 = new MyButtons();
//row1.setPreferredSize(new Dimension(250, 100));
//row2.setPreferredSize(new Dimension(250, 100));
//frame.setLayout(new GridLayout(3, 2,10,10));
ui.add(row1);
ui.add(row2);
frame.add(ui);
frame.pack();
frame.setVisible(true);
}
}
N.B. Please learn common Java nomenclature (naming conventions - e.g. EachWordUpperCaseClass, firstWordLowerCaseMethod(), firstWordLowerCaseAttribute unless it is an UPPER_CASE_CONSTANT) and use it consistently.
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);
}
});
}
I create two jbuttons in one panel(can be Box).i create same panel dynamically several times in same frame.so if two panels created dynamically those button make with same variable name.But i want to identify buttons one by one for put actions.how to identify dynamically created buttons one by one?
button creating code
public class Jscrollpanetest extends JFrame {
JScrollPane scrollPane;
Box box;
private static int panelCount = 0;
public Jscrollpanetest() {
setPreferredSize(new Dimension(200, 400));
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
scrollPane = new JScrollPane();
scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
scrollPane.getVerticalScrollBar().setUnitIncrement(15);
box = Box.createVerticalBox();
scrollPane.getViewport().add(box);
this.add(scrollPane);
this.pack();
this.setLocationRelativeTo(null);
this.setVisible(true);
Timer t = new Timer(1000, new ActionListener() {
public void actionPerformed(ActionEvent ae) {
box.add(new TestPanel(), box.size());
scrollPane.validate();
}
});
t.setRepeats(true);
t.start();
}
public class TestPanel extends JPanel {
int myId = panelCount++;
public TestPanel() {
this.setLayout(new GridBagLayout());
this.setBorder(BorderFactory.createBevelBorder(1));
JButton up = new JButton("^");
JLabel rate = new JLabel("1");
JButton down = new JButton("^");
JLabel label = new JLabel("" + myId);
label.setHorizontalAlignment(JLabel.CENTER);
label.setVerticalAlignment(JLabel.CENTER);
this.setMaximumSize(new Dimension(1000, 200));
this.setPreferredSize(new Dimension(1000, 100));
this.add(label);
this.add(up);
this.add(rate);
this.add(down);
}
}
public static void main(String[] args) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
Jscrollpanetest testScrollPane = new Jscrollpanetest();
}
});
}
}
If use and dynamic created ActionListener there will be no problem. So each button will have its own ActionListener.
If using a common ActionListener must add tags to each button as extend JButton.
I want to position the JPanel that contains the send button and the textfield (and right now uses a flowlayout) at the bottom of the JTextArea (The white area).
How can I achieve this?
public GUI()
{
mainWindow = new JFrame("Chat GUI");
lowerPanel = new JPanel(new FlowLayout());
usersPanel = new JPanel(new GridLayout(GRIDLAYOUT_ROWS, GRIDLAYOUT_COLS));
users = new JList(data);
usersPanel.add(users);
sendButton = new JButton("Send");
textField = new JTextField(TEXTFIELD_WIDTH);
textArea = new JTextArea(TEXTAREA_HEIGHT, TEXTAREA_WIDTH);
textArea.setEditable(false);
}
private void addButtonListener(JButton b) {
b.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
}
public void createGUI() {
addButtonListener(sendButton);
lowerPanel.add(sendButton);
lowerPanel.add(textField);
mainWindow.add(users);
mainWindow.add(textArea);
mainWindow.add(lowerPanel);
mainWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainWindow.setVisible(true);
mainWindow.setLayout(new FlowLayout());
mainWindow.pack();
}
You Will have Layout :
this.add(buttonPanel,BorderLayout.SOUTH);
see this answer