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Programming Articles
Page 2479 of 2547
How to set location of JLabel in a JFrame with Java?
To set location of a component in a JFrame, use the setBounds() method. Let us first create a frame and a panel −JFrame frame = new JFrame("Demo Frame"); JPanel panel = new JPanel(); frame.getContentPane();Create a component i.e. label and set the dimensions using setBounds(). Here, you can set the location in the form of x and y coordinates −JLabel label = new JLabel("Demo Label!"); Dimension size = label.getPreferredSize(); label.setBounds(150, 100, size.width, size.height);The following is an example to set location of a label in a JFrame −Examplepackage my; import java.awt.Dimension; import javax.swing.BorderFactory; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.WindowConstants; public ...
Read MoreSet the JSlider vertical and move bottom-to-top in Java
To set the JSlider vertical, use the VERTICAL constant while creating the slider. Let us create a new Slider −JSlider slider = new JSlider(JSlider.VERTICAL, 0, 100, 60);The other parameter values set above allows you to include the minimum, maximum and the initial value of the slider.The following is an example to set the slider vertical and move bottom-to-top −Examplepackage my; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JSlider; import javax.swing.WindowConstants; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame("Frame with Slider"); JSlider slider = new JSlider(JSlider.VERTICAL, 0, 100, 60); ...
Read MoreHow to set default button for JFrame in Java?
To set default button for JFrame, use the setDefaultButton() method −JFrame frame = new JFrame(); frame.getRootPane().setDefaultButton(button);The following is an example to set default button for JFrame −Exampleimport java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import javax.swing.JButton; import javax.swing.JFrame; public class SwingDemo { public static void main(String args[]) { JButton button = new JButton("Demo Button!"); JFrame frame = new JFrame(); frame.setSize(500, 300); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getRootPane().setDefaultButton(button); button.setMnemonic(KeyEvent.VK_A); button.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { ...
Read MoreHow to get the depth of root node in a JTree with Java?
To get the depth of root node in a JTree in Java, use the getDepth() method. Let’s say our root node is “node”, therefore, we will get the depth of root node like this −node.getDepth();The following is an example to get the depth of root node −Examplepackage my; import javax.swing.JFrame; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Demo"); DefaultMutableTreeNode node = new DefaultMutableTreeNode("Website"); DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("Videos"); DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("Tutorials"); DefaultMutableTreeNode ...
Read MoreCheck if hidden files are displayed in the FileChooser or not in Java
The result FALSE for is FileHidingEnabled() means the hidden files are displayed in the FileChooser. The following will display FALSE since file isn’t hidden −JFileChooser file = new JFileChooser(); file.setMultiSelectionEnabled(false); file.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES); file.setFileHidingEnabled(false); boolean res = file.isFileHidingEnabled();Above, at first, we have displayed the file by setting hidden to be FALSE −file.setFileHidingEnabled(false);The following is an example −Examplepackage my; import javax.swing.JFileChooser; public class SwingDemo { public static void main(String[] args) { JFileChooser file = new JFileChooser(); file.setMultiSelectionEnabled(false); file.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES); file.setFileHidingEnabled(false); boolean res = file.isFileHidingEnabled(); System.out.println("File are ...
Read MoreHow to create modeless and model JDialog in Java?
MODELESS TypeThe following is an example to set JDialog with Modality type MODELESS −Exampleimport java.awt.Cursor; import java.awt.Dialog.ModalityType; import java.awt.Dimension; import java.awt.event.ActionEvent; import javax.swing.AbstractAction; import javax.swing.JButton; import javax.swing.JDialog; import javax.swing.JFrame; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame(); frame.setSize(new Dimension(600, 400)); JDialog dialog = new JDialog(frame, "New", ModalityType.MODELESS); dialog.setSize(300, 300); frame.add(new JButton(new AbstractAction("Click to generate") { @Override public void actionPerformed(ActionEvent e) { frame.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR)); ...
Read MoreGet the total number of leaves of a JTree in Java?
To get the total number of leaved of a JTree, apply the getLeafCount() method on the root node. Let’s say our root node is “node”, therefore to count the number of leaves, use −node.getLeafCount()The following is an example to get the total number of leaves of a JTree −package my; import javax.swing.JFrame; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Demo"); DefaultMutableTreeNode node = new DefaultMutableTreeNode("Website"); DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("Videos"); DefaultMutableTreeNode node2 = new ...
Read MoreHow to enable multiple selections in a JFileChooser Dialog with Java?
To enable multiple selections in a JFileChooser dialog, use the setMultiSelectionEnabled() to be TRUE −JFileChooser file = new JFileChooser(); file.setMultiSelectionEnabled(true);The following is an example to enable multiple selections in a JFileChooser Dialog −Examplepackage my; import javax.swing.JFileChooser; public class SwingDemo { public static void main(String[] args) { JFileChooser file = new JFileChooser(); file.setMultiSelectionEnabled(true); file.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES); file.setFileHidingEnabled(false); if (file.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) { java.io.File f = file.getSelectedFile(); System.err.println(f.getPath()); } } }Output
Read MoreDraw a border around an undecorated JFrame in Java
At first, set an undecorated frame −setUndecorated(true);Now draw a border −getRootPane().setBorder (.createMatteBorder(3, 3, 3, 3, Color.ORANGE));The following is an example to draw a border around an undecorated JFrame −Exampleimport java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import javax.swing.BorderFactory; import javax.swing.JFrame; import javax.swing.JLabel; public class SwingDemo extends JFrame { JLabel label = new JLabel("Welcome!", JLabel.CENTER); public SwingDemo() { setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setSize(new Dimension(500, 300)); add(label, BorderLayout.CENTER); setUndecorated(true); getRootPane().setBorder( BorderFactory.createMatteBorder(3, 3, 3, 3, Color.ORANGE)); setVisible(true); } public static void main(String[] args) { new SwingDemo(); } }Output
Read MoreHow to set the location of a button anywhere in JFrame?
To set location of a button anywhere a JFrame, use the setBounds() method. Let us first create a frame and a panel −JFrame frame = new JFrame("Demo Frame"); JPanel panel = new JPanel(); frame.getContentPane();Create a component i.e. label and set the dimensions using setBounds(). Here, you can set the location in the form of x and y coordinates and place the button anywhere in a frame −JButton button = new JButton("Demo Button"); Dimension size = button.getPreferredSize(); button.setBounds(300, 180, size.width, size.height);The following is an example to set the location of a button anywhere in JFrame −Examplepackage my; import java.awt.Dimension; import javax.swing.BorderFactory; ...
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