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Object Oriented Programming Articles
Page 532 of 588
How to create a LineBorder with BorderFactory class in Java?
To create line border, use the createLineBorder() method. Let us first create a label component −JLabel label; label = new JLabel("Demo label");Now, create line border with BorderFactory class. Here, we have also set the color for the line border −label.setBorder(BorderFactory.createLineBorder(Color.yellow));The following is an example to create a LineBorder with BorderFactory class −package my; import javax.swing.BorderFactory; import java.awt.Color; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JLabel; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Demo"); JLabel label; label = new JLabel("Demo label"); ...
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 center a JLabel in a JPanel with GridBagLayout in Java?
Center a component in a JPanel with GridBagLayout. Let us first create a JFrame and JPanel inside it -JFrame frame = new JFrame("Demo Frame"); JPanel panel = new JPanel();Now, we will add our components −JLabel label = new JLabel("Demo Label (Centered)"); label.setForeground(Color.white); JCheckBox checkBox = new JCheckBox("Checkbox (Centered)");Set the layout −panel.setLayout(new GridBagLayout());The following is an example to center a label in a panel with GridBagLayout −Examplepackage my; import java.awt.Color; import java.awt.GridBagLayout; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.WindowConstants; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame("Demo ...
Read MoreHow to add Internal Frame to a JDesktopPane in Java?
At first, create a JDesktoPane −JDesktopPane desktopPane = new JDesktopPane();Now, create an Internal frame and add it to the JDesktopPane −JInternalFrame intFrame = new JInternalFrame("Our Frame", true, true, true, true); desktopPane.add(intFrame); The following is an example to add Internal Frame to a JDesktopPane − package my; import java.awt.BorderLayout; import javax.swing.JButton; import javax.swing.JDesktopPane; import javax.swing.JFrame; import javax.swing.JInternalFrame; import javax.swing.JLabel; public class SwingDemo { public static void main(final String[] args) { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JDesktopPane desktopPane = new JDesktopPane(); JInternalFrame intFrame = new JInternalFrame("Our Frame", true, ...
Read MoreHow to set Palette Layer for JDesktopPane in Java?
At first, create a JDesktopPane −JDesktopPane desktopPane = new JDesktopPane();Now, create an Internal Frame −JInternalFrame intFrame = new JInternalFrame("Our Frame", true, true, true, true); intFrame.setBounds(50, 90, 200, 250);Set Pallette layer for JDesktopPane and add the Internal Frame to JDesktopPane −intFrame.putClientProperty("JInternalFrame.isPalette", Boolean.TRUE); desktopPane.add(intFrame, JDesktopPane.PALETTE_LAYER);The following is an example to set palette layer for JDesktopPane −package my; import java.awt.BorderLayout; import javax.swing.JButton; import javax.swing.JDesktopPane; import javax.swing.JFrame; import javax.swing.JInternalFrame; import javax.swing.JLabel; public class SwingDemo { public static void main(final String[] args) { JFrame frame = new JFrame("Demo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JDesktopPane desktopPane = new JDesktopPane(); ...
Read MoreHow to use GridBagConstraints to layout two components in the same line with Java
To align two components in the same line, you need to set the contrainsts of the GridBagConstraints properly. Let’s say we have two components in panel1. Set the contraints using Insets as well −panel1.add(checkBox1, new GridBagConstraints(0, 0, 1, 1, 0.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0)); panel1.add(checkBox2, new GridBagConstraints(1, 0, 1, 1, 2.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));The following is an example to set two components in the same line −Examplepackage my; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.Insets; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JPanel; public class SwingDemo { ...
Read MoreGet the number of levels above a node in JTree with Java
To get the number of levels above a node, use the getLevel() method. Following is an example for the root node “node” −node.getLevel()Note − The value 0 is returned if the node is a root node since there are zero levels above the root node.For other nodes, get the number of levels above a node as shown below with node3 −node3.getLevel()The following is an example to get the number of levels above a node in 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 { ...
Read MoreHow to set font face, style, size and color for JTextPane text in Java
For background and foreground color of the JTextPane, use the following −JTextPane textPane = new JTextPane(); textPane.setBackground(Color.blue); textPane.setBackground(Color.green);For font face, style and size, use the Font class and set the font −Font font = new Font("Serif", Font.ITALIC, 18); textPane.setFont(font);The following is an example to set font, style and color for text in JTextPane −Examplepackage my; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Container; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTextPane; import javax.swing.text.BadLocationException; import javax.swing.text.SimpleAttributeSet; import javax.swing.text.Style; import javax.swing.text.StyleConstants; import javax.swing.text.StyledDocument; public class SwingDemo { public static void main(String args[]) throws BadLocationException { JFrame frame = new JFrame("Demo"); ...
Read MoreHow to add a Tab in JTabbedPane with Java?
Let us first create a JTabbedPane −JTabbedPane tabbedPane = new JTabbedPane();Create some panels −JPanel panel1, panel2, panel3, panel4, panel5; panel1 = new JPanel(); panel2 = new JPanel(); panel3 = new JPanel(); panel4 = new JPanel(); panel5 = new JPanel();Now, add tabs using the addTab() method and set the panels as well in which the tabs would be visible −tabbedPane.addTab("PHP", panel1); tabbedPane.addTab("Blockchain ", panel2); tabbedPane.addTab("Matlab", panel3); tabbedPane.addTab("JSP ", panel4); tabbedPane.addTab("Servlet", panel5);The following is an example to add a tab in JTabbedPane −package my; import javax.swing.*; import java.awt.*; public class SwingDemo { public static void main(String args[]) { ...
Read MoreHow to specify tab location to make it visible in the bottom with Java?
Use the setTabPlacement() method to set the tab location. To make it visible in the bottom, use the BOTTOM constant −JTabbedPane tabbedPane = new JTabbedPane(); tabbedPane.setTabPlacement(JTabbedPane.BOTTOM);The following is an example to specify tab location to make it visible in the bottom −package my; import javax.swing.*; import java.awt.*; import java.awt.event.KeyEvent; public class SwingDemo { public static void main(String args[]) { JFrame frame = new JFrame("Technologies"); JTabbedPane tabbedPane = new JTabbedPane(); JPanel panel1, panel2, panel3, panel4, panel5; panel1 = new JPanel(); panel2 = new JPanel(); ...
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