I have the following JButton on the GUI interface I'm building.
I want to make the border around the button more thicker so it will stand out from the background. Is it possible to do this in Java?
You could simply use a LineBorder
JButton btn = ...;
btn.setBorder(BorderFactory.createLineBorder(Color.BLACK, 4));
Take a look at How to Use Borders for more details and ideas
Updating the border state based on the model state
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.Border;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public static class TestPane extends JPanel {
protected static final Border NORMAL_BORDER = BorderFactory.createLineBorder(Color.BLACK, 4);
protected static final Border ROLLOVER_BORDER = BorderFactory.createLineBorder(Color.RED, 4);
public TestPane() {
JButton btn = new JButton("Click me!");
btn.setContentAreaFilled(false);
btn.setBorder(NORMAL_BORDER);
btn.getModel().addChangeListener(new ChangeListener() {
#Override
public void stateChanged(ChangeEvent e) {
if (btn.getModel().isRollover()) {
btn.setBorder(ROLLOVER_BORDER);
} else {
btn.setBorder(NORMAL_BORDER);
}
}
});
setLayout(new GridBagLayout());
add(btn);
}
}
}
Create a Border first -
Border border = new LineBorder(Color.WHITE, 13);
Then create a JButton and set the Border -
JButton button = new JButton("Button Name");
button.setBorder(border);
Hope it will Help.
Thanks a lot.
Related
To abstract this problem, I put 2 buttons. One is called "Add & toTop", another is called "toTop"
And there is no text in the textArea at the very beginning.
And I add the actionListener for "Add & toTop" button like this:
btn1.addMouseListener(new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent e) {
textArea1.setText("jhggjhg\nhugffsrdtfg\ngfdrtdf\nhgftrsdf\nytfresrdcfvg\nuytyrdtesrdfgg\ntdrfygvhct\njh"
+ "gfda\njftyuyiugcf\nhfuygihvftyughbuy\nhgyuftydfhgfyc\ndstryrfdts");
//A long enough String
JScrollBar jb = scrollPane1.getVerticalScrollBar();
jb.setValue(jb.getMinimum());
scrollPane1.repaint();
}
});
So the function of the first button is :"Add some text and Scroll to Top"
But it will only add text but will not scroll to top
However for the second button, I add a actionListener like this:
btn2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JScrollBar VerticalScrollBar = scrollPane1.getVerticalScrollBar();
VerticalScrollBar.setValue(VerticalScrollBar.getMinimum());
scrollPane1.repaint();
}
});
So, I press the second button after pressing the first button, the second button will perform well.
And I really feel confused that why the first button will not scroll to top :<
A simple solution might be to use JTextArea#setCaretPosition, for example
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private JTextArea ta;
public TestPane() {
setLayout(new BorderLayout());
ta = new JTextArea(5, 20);
add(new JScrollPane(ta));
JButton btn = new JButton("Add and to top");
btn.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
ta.setText("jhggjhg\nhugffsrdtfg\ngfdrtdf\nhgftrsdf\nytfresrdcfvg\nuytyrdtesrdfgg\ntdrfygvhct\njh"
+ "gfda\njftyuyiugcf\nhfuygihvftyughbuy\nhgyuftydfhgfyc\ndstryrfdts");
ta.setCaretPosition(0);
}
});
add(btn, BorderLayout.SOUTH);
}
}
}
I had a play around with scrollRectToVisible, but ended up having to use SwingUtilites.invokeLater to make it work, for example...
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
ta.scrollRectToVisible(new Rectangle(0, 0, 10, 10));
}
});
so I'd say setCaretPosition in this case is the simpler solution
I know that there are already very similar questions to my question on stackoverflow, but neither one of them answers my question.
I want to put my JButton on a specific location on my JFrame in JAVA. Here is my Code:
public class DetectMotion extends JFrame {
private JLabel label = null;
public DetectMotionExample() {
JPanel pnlButton = new JPanel();
label = new JLabel(nothing);
JButton btn = new JButton("Close");
pnlButton.setLayout(new BorderLayout());
setTitle("Motion Detector");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new FlowLayout());
btn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
if (e.getActionCommand().equals("Close")) {
//TO-DO
}
}
});
WebcamPanel panel = new WebcamPanel(webcam);
add(panel);
pnlButton.add(btn,BorderLayout.SOUTH);
pnlButton.add(label,BorderLayout.NORTH);
add(pnlButton);
pack();
setVisible(true);
}
}
I have a panel on my JFrame (webcamPanel) and a JPanel called pnlButton that includes the JButton (btn) and JLabel (label).
Now, how can I specifically change the location of my button instead of just using BorderLayout.NORTH?
Thanks!
Make use of appropriate layout managers to achieve your goals...
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class DetectMotion extends JFrame {
private JLabel label = null;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
DetectMotion frame = new DetectMotion();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public DetectMotion() {
JPanel pnlButton = new JPanel();
label = new JLabel("nothing");
JButton btn = new JButton("Close");
pnlButton.setLayout(new GridBagLayout());
setTitle("Motion Detector");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new BorderLayout());
btn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (e.getActionCommand().equals("Close")) {
//TO-DO
}
}
});
JPanel panel = new JPanel() {
#Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
};
panel.setBackground(Color.RED);
add(panel);
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.weighty = 1;
pnlButton.add(label, gbc);
gbc.weighty = 0;
pnlButton.add(btn, gbc);
add(pnlButton, BorderLayout.EAST);
pack();
setVisible(true);
}
}
package javaapplication647;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class DetectMotion extends JFrame {
private JLabel label = null;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
DetectMotion frame = new DetectMotion();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public DetectMotion() {
JPanel pnlButton = new JPanel();
label = new JLabel("nothing");
JButton btn = new JButton("Close");
pnlButton.setLayout(new FlowLayout(FlowLayout.RIGHT));
setTitle("Motion Detector");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new BorderLayout());
btn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (e.getActionCommand().equals("Close")) {
//TO-DO
}
}
});
JPanel panel = new JPanel() {
#Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
};
panel.setBackground(Color.RED);
add(panel);
pnlButton.add(label);
pnlButton.add(btn);
add(pnlButton, BorderLayout.SOUTH);
pack();
setVisible(true);
}
}
Take a look at Laying Out Components Within a Container for more ideas
If you want to put the item into a specific coordinate you have to use null Layout:
Example:
public void newClass(){
public newClass(){
JPanel panel = new JPanel();
JButton button = new JButton("button1");
panel.setLayout(null);
button.setBounds(x,y,X,Y);
panel.add(button);
}
public static void main(String[] args){
newClass();
}
}
Doing Without a Layout Manager (Absolute Positioning)
Your best bet is to use a Java Drag-and-Drop GUI builder like NetBeans. Particularly if you're interested in very specific positioning, nothing really beats a GUI builder.
How to untoggle jtogglebuttons that belongs to ButtonGroups on second click? What listener should I use for this? Thanks!
JtoggleButton toggleButton;
toggleButton.addActionListener?
toggleButton.addChangeListener?
How to untoggle jtogglebuttons that belongs to ButtonGroups on second click? What listener should I use for this?
None, the ButtonGroup will take care of it automatically, that's the point. The ButtonGroup will only allow a single button to be selected within the group at a time.
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JToggleButton;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Test {
public static void main(String[] args) {
new Test();
}
public JavaApplication243() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
ButtonGroup bg = new ButtonGroup();
JToggleButton btn1 = new JToggleButton("One");
JToggleButton btn2 = new JToggleButton("Two");
bg.add(btn1);
bg.add(btn2);
add(btn1);
add(btn2);
}
}
}
public class CustomButtonGroup extends ButtonGroup {
#Override
public void setSelected(ButtonModel model, boolean selected) {
if (selected) {
super.setSelected(model, selected);
} else {
clearSelection();
}
}
}
I want to set the Border height,width of JTextField and want to put it on the center of the JFrame in java.
I tried those ideas but those ideas does not work.
setSize(),SetPrefferedSize(),SetMaximumSize();
Need Help. Thanks in advance.
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JTextField;
public class P{
public static void main(String [] args){
JFrame frame = new JFrame();
JTextField field = new JTextField();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(BorderLayout.NORTH,field);
frame.setSize(350,300);
frame.setVisible(true);
}
}
You could try using a LineBorder on the JTextField and place it within a container using GridBagLayout
For example...
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.LineBorder;
public class BorderText {
public static void main(String[] args) {
new BorderText();
}
public BorderText() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JTextField field = new JTextField(10);
field.setBorder(new LineBorder(Color.RED, 10));
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new GridBagLayout());
frame.add(field);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}
Take a look at How to Use Borders and A Visual Guide to Layout Managers for more details
I want help somebody. I want to create a JPanel that will popup when i click on a button, it must appear there where the button is clicked, and it must not affect other components. An example of that is a JDateChooser, when you click on that button, a calendar appears right there, but when you click anywhere else, that panel disappears. what i want is to put a list of names in that panel when it pops. It is similar to JPopupmenu except that when you click anywhere else it must disappear.
I'm not sure what you're doing, but it seems to work just fine for me...
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JScrollPane;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
public class ButtonPopup {
public static void main(String[] args) {
new ButtonPopup();
}
public ButtonPopup() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
setLayout(new GridBagLayout());
final JPopupMenu popup = new JPopupMenu();
DefaultListModel<String> model = new DefaultListModel<>();
model.addElement("Item 1");
model.addElement("Item 2");
model.addElement("Item 3");
model.addElement("Item 4");
model.addElement("Item 5");
JList list = new JList(model);
popup.setLayout(new BorderLayout());
popup.add(new JScrollPane(list));
final JButton button = new JButton("Pop");
button.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
Dimension size = popup.getPreferredSize();
int x = (button.getWidth() - size.width) / 2;
int y = button.getHeight();
popup.show(button, x, y);
}
});
list.addListSelectionListener(new ListSelectionListener() {
#Override
public void valueChanged(ListSelectionEvent e) {
popup.setVisible(false);
}
});
add(button);
}
#Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
g2d.dispose();
}
}
}