To display tree structured data, use the JTree control in Java Swing.At first, create a node in the tree −DefaultMutableTreeNode node = new DefaultMutableTreeNode("Project");Now, add nodes to the node created above −DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("App"); DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("Website"); DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("WebApp"); node.add(node1); node.add(node2); node.add(node3);Now, create more nodes and set them as child nodes for the nodes we creted above −DefaultMutableTreeNode one = new DefaultMutableTreeNode("Learning website"); DefaultMutableTreeNode two = new DefaultMutableTreeNode("Business website"); DefaultMutableTreeNode three = new DefaultMutableTreeNode("News publishing website"); DefaultMutableTreeNode four = new DefaultMutableTreeNode("Android app"); DefaultMutableTreeNode five = new DefaultMutableTreeNode("iOS app"); DefaultMutableTreeNode six = new DefaultMutableTreeNode("Editor ... Read More

Yes, we can enable drag and drop between two text fields in Java. Let us first create two JTextFields and set content in it as shown below −JTextField one = new JTextField(20); one.setText("You can drag!"); JTextField two = new JTextField(20); two.setText("Drag here or there");Now, we will enable and drag and drop for both the components created above −one.setDragEnabled(true); two.setDragEnabled(true);The following is an example to enable drag and drop between two text fields −Examplepackage my; import java.awt.Container; import java.awt.FlowLayout; import javax.swing.BoxLayout; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTextField; import javax.swing.SwingConstants; public class SwingDemo {    public static void main(String[] args) throws Exception ... Read More

In this article, we will learn how to set the horizontal alignment of content in a JTextField class using Java Swing. The content in the JTextFile is by default left aligned, but you can change it using the setHorizontalAlignment() method. Steps to Set Horizontal Alignment of Content in a JTextField Following are the steps to set the Horizontal Alignment of content in a JTextField − Import the required Java Swing packages. Create a JFrame and set layout manager. Create JLabel and JTextField then set horizontal alignment. ... Read More

Yes, we can save the content to a file with FileWriter class. Set a JTextFile component as shown below −JTextField emailId = new JTextField(20); emailId.setText("abc@example.com");Set the file location from to where you want to save the content from the JTextField −String file = "E:ew.txt";Now, with FileWriter, save the content −FileWriter fileWriter = new FileWriter(file); emailId.write(fileWriter); fileWriter.close();The following is an example to save content from JTextFile to a file. Here, we are saving the text from JTextField to a file at location: “E:ew.txt” −Examplepackage my; import java.awt.FlowLayout; import java.io.FileWriter; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTextField; import javax.swing.SwingConstants; public class SwingDemo { ... Read More

To create right justified JTextField, set the alignment to be RIGHT. Here, we will be using the setHorizontalAlignment() method as well and within that the alignment would be set.Create a JTextField −JTextField emailId = new JTextField(20);Now, align it to the right −emailId.setHorizontalAlignment(JTextField.RIGHT);The following is an example to create right justified JTextField −Examplepackage my; import java.awt.FlowLayout; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTextField; import javax.swing.SwingConstants; public class SwingDemo {    public static void main(String[] args) throws Exception {       JFrame frame = new JFrame("Enter emailid...");       JLabel label;       frame.setLayout(new FlowLayout());       label = ... Read More

To change the minimum value of a slider in Java, use the setMinimum() method wherein set the minimum value.Let’s say the following is our slider in Java −JSlider slider = new JSlider(JSlider.HORIZONTAL, 0, 100, 55); slider.setMinorTickSpacing(10); slider.setMajorTickSpacing(20); slider.setPaintTicks(true); slider.setPaintLabels(true);Now, set the minimum value −slider.setMinimum(10);The following is an example to change the minimum value of a JSlider −Examplepackage my; import java.awt.Color; import java.awt.Font; 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.HORIZONTAL, 0, ... Read More

Use the setVgap() method to set the vertical gap between elements in a GridLayout. Let’s say we have a GridLaypout −GridLayout layout = new GridLayout(3, 3);Set the horizontal gap −layout.setVgap(30);The following is an example −Examplepackage my; import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Font; import java.awt.GridLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextArea; import javax.swing.WindowConstants; public class SwingDemo {    public static void main(String[] args) {       JFrame frame = new JFrame("Sections");       JPanel panel = new JPanel();       panel.setBackground(Color.blue);       GridLayout layout = new GridLayout(3, 3);     ... Read More

To display tick marks in a JSlider, you need to use the setPaintTicks() method and set it to TRUE −JSlider slider = new JSlider(JSlider.HORIZONTAL, 0, 100, 75); slider.setPaintTicks(true);The following is an example to display tick marks in a slider in Java −Examplepackage my; import java.awt.Color; import java.awt.Font; 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.HORIZONTAL, 0, 100, 75);       slider.setMinorTickSpacing(5);       slider.setMajorTickSpacing(20);       slider.setPaintTicks(true);   ... Read More

Remove a menu from the MenuBar using the remove() method. Set the index for the menu you want to remove from the MenuBar.Let’s say we have the following two menus initially −The following is an example to remove one the above menus. Let’s say we are removing the 2nd menus “Edit” −Examplepackage my; import java.awt.event.KeyEvent; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; 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();       JMenu ... Read More

To hide the track on the slider, you need to use the setPaintTrack() method and set it to FALSE −JSlider slider = new JSlider(JSlider.HORIZONTAL, 0, 100, 55); slider.setInverted(true); slider.setMinorTickSpacing(10); slider.setMajorTickSpacing(25); slider.setPaintTicks(true); slider.setPaintLabels(true); slider.setPaintTrack(false);The above method setPaintTrack() is by default set to TRUE.The following is an example to hide the track on the slider −Examplepackage my; import java.awt.Color; import java.awt.Font; 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.HORIZONTAL, 0, 100, 55);   ... Read More