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Object Oriented Programming Articles
Page 529 of 589
Java Program to set minor tick marks in a JSlider every 10 units
Minor Tick marks is the number passed in representing the distance between each minor tick mark. For example, a slider with range from 0 to 70 and minor tick spacing 10, would give minor ticks next to the following values: 0, 10, 20, 30, 40, 50, 60, 70.To set minor tick marks, use the setMinorTickSpacing() method −JSlider slider = new JSlider(JSlider.HORIZONTAL, 0, 100, 60); slider.setMinorTickSpacing(10);Note − For minor ticks to be painted, you need to set setPaintTicks to true.The following is an example to set minor tick marks in a slider every 10 units −Examplepackage my; import javax.swing.JFrame; import javax.swing.JPanel; ...
Read MoreHow to highlight multiple rows in a sequence in a table with Java Swing?
To highlight multiple rows in a table, you can use the addRowSelectionInterval() method. At first create a table −DefaultTableModel tableModel = new DefaultTableModel(); JTable table = new JTable(tableModel);Add some columns −tableModel.addColumn("Language/ Technology"); tableModel.addColumn("Text Tutorial"); tableModel.addColumn("Video Tutorial"); tableModel.addColumn("Views");Now, add rows to the table −tableModel.addRow(new Object[] { "NodeJS", "No", "Yes", "2350"}); tableModel.addRow(new Object[] { "MVC", "Yes", "No", "1500"}); tableModel.addRow(new Object[] { "ASP.NET", "Yes", "Yes", "3400"}); tableModel.addRow(new Object[] { "F#", "Yes", "No", "7890"}); tableModel.addRow(new Object[] { "Blockchain", "Yes", "No", "10600"}); tableModel.addRow(new Object[] { "SharePoint", "Yes", "Yes", "4900"});Highlight multiple rows by adding interval of rows from both ends. Set interval (index) for both the ...
Read MoreSet whether the column in the table model can be selected or deselected in Java?
We can set or disallow selection of column in the table using setColumnSelectionAllowed().Let’s say the following is our table −DefaultTableModel tableModel = new DefaultTableModel(); JTable table = new JTable(tableModel);If you want to allow selection of column, then set the method to TRUE −table.setColumnSelectionAllowed(true);If you want to disallow selection of column, then set the method to FALSE −table.setRowSelectionAllowed(false);Here, in the below example we have disallowed selection of columns −Examplepackage my; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.table.DefaultTableModel; public class SwingDemo { public static void main(String[] argv) throws Exception { DefaultTableModel tableModel = new DefaultTableModel(); ...
Read MoreHow to add a title to JTable in Java Swing?
To display a title to the JTable, you can set a title for the JPanel, which already consists of a JTable.Here, we are using createTitledBorder() for the JPanel to set the title for the panel border that would eventually work for table title.Let’s say the following is the JPanel −JPanel panel = new JPanel();Now, use setBorder() and the BorderFactory class to set a title border for the panel that would be our table title as well −panel.setBorder(BorderFactory.createTitledBorder( BorderFactory.createEtchedBorder(), "My Demo Table", TitledBorder.LEFT, TitledBorder.TOP));The following is an example to add a title to a JTable −Examplepackage my; import javax.swing.BorderFactory; import ...
Read MoreHow to set foreground color for different words in a JTextPane
To set the foreground color for different words, use the SimpleAttributeSet and StyleConstants class. With that, use StyledDocument class as well for different words style. For different words, use insertString().At first, create a new JTextPane -At first, create a new JTextPane: JTextPane pane = new JTextPane();Now, use the classes to set the style and color for some words −StyledDocument doc = textPane.getStyledDocument(); Style style = textPane.addStyle("", null); StyleConstants.setForeground(style, Color.red); StyleConstants.setBackground(style, Color.white); doc.insertString(doc.getLength(), "Game of Thrones ", style);Now, style some other words differently −StyleConstants.setForeground(style, Color.yellow); StyleConstants.setBackground(style, Color.gray); doc.insertString(doc.getLength(), "Season 8", style);The following is an example to set foreground color for different ...
Read MoreHow to arrange components in a Flow to be right-justified in Java?
Use FlowLayout.RIGHT to arrange components in a FlowLayout to be right-justified. −JFrame frame = new JFrame("Language"); frame.setLayout(new FlowLayout(FlowLayout.RIGHT));The following is an example to arrange components in a flow to be right-justified −Examplepackage my; import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTextArea; import javax.swing.WindowConstants; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame("Language"); frame.setLayout(new FlowLayout(FlowLayout.RIGHT)); JLabel label = new JLabel("Most Spoken Language "); label.setPreferredSize(new Dimension(220, 70)); label.setOpaque(true); label.setBackground(Color.RED); ...
Read MoreHow to create a Default Cell Editor that uses a JCheckBox in Java?
Create a check box first and set valueJCheckBox checkBox = new JCheckBox("In-Stock");Set the JCheckBox for the editor so that the editor uses the check box −TreeCellEditor editor = new DefaultCellEditor(comboBox); tree.setEditable(true); tree.setCellEditor(editor);The following is an example to create a Default Cell Editor that uses a JCheckBox −Examplepackage my; import javax.swing.DefaultCellEditor; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.TreeCellEditor; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Demo"); DefaultMutableTreeNode node = new DefaultMutableTreeNode("Products"); DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("Clothing"); ...
Read MoreJava Program to customize MenuBar and change the background color
Use the UIManager to customize the MenuBar:JMenuBar menuBar = new JMenuBar(); UIManager.put("MenuBar.background", Color.ORANGE);We have used the following above to update the background color of the MenuBar:UIManager.put("MenuBar.background", Color.ORANGE);The following is an example to customize MenuBar and change the background color:package my; import java.awt.Color; import java.awt.event.KeyEvent; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.UIManager; public class SwingDemo { public static void main(final String args[]) { JFrame frame = new JFrame("MenuBar Demo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JMenuBar menuBar = new JMenuBar(); UIManager.put("MenuBar.background", Color.ORANGE); JMenu fileMenu = new JMenu("File"); ...
Read MoreHow can I separate Menu Items in a Menu with Java?
Let’s say we have following MenuBar and menu in it -JMenuBar menuBar = new JMenuBar(); UIManager.put("MenuBar.background", Color.ORANGE); JMenu fileMenu = new JMenu("File"); fileMenu.setMnemonic(KeyEvent.VK_F); menuBar.add(fileMenu);Now, we will create a MenuItem and separate it using the JSeparator():JMenuItem menuItem1 = new JMenuItem("New", KeyEvent.VK_N); fileMenu.add(menuItem1); // separating MenuItems fileMenu.add(new JSeparator());The following is an example to separate Menu Items in a Menu with Java -Examplepackage my; import java.awt.Color; import java.awt.event.KeyEvent; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JSeparator; import javax.swing.UIManager; public class SwingDemo { public static void main(final String args[]) { JFrame frame = new JFrame("MenuBar Demo"); ...
Read MoreHow to allow only a single tree node to be selected in a JTree with Java?
Set the selection mode to SINGLE_TREE_SELECTION, if you want only a single tree node to be selected −tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);The following is an example to allow only a single tree node to be selected in a JTree −Examplepackage my; import javax.swing.JFrame; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.TreeSelectionModel; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Demo"); DefaultMutableTreeNode node = new DefaultMutableTreeNode("Products"); DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("Clothing"); DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("Electronics"); DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("Home Decor"); ...
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