- Swing Programming Examples
- Example - Home
- Example - Environment Setup
- Example - Borders
- Example - Buttons
- Example - CheckBoxes
- Example - Combo Boxes
- Example - Color Choosers
- Example - Dialogs
- Example - Editor Panes
- Example - File Choosers
- Example - Formatted TextFields
- Example - Frames
- Example - Lists
- Example - Layouts
- Example - Menus
- Example - Password Fields
- Example - Progress Bars
- Example - Scroll Panes
- Example - Sliders
- Example - Spinners
- Example - Tables
- Example - Toolbars
- Example - Tree
- Swing Useful Resources
- Swing - Quick Guide
- Swing - Useful Resources
- Swing - Discussion
Swing Examples - Create Tree
Following example showcase how to create a tree in a Java Swing application.
We are using the following APIs.
JTree(root) − To create a tree.
DefaultMutableTreeNode() − To create a tree node.
DefaultMutableTreeNode().add(node) − To add a tree node to a tree node.
Example
import java.awt.FlowLayout; import java.awt.GridLayout; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; public class SwingTester { private JFrame mainFrame; private JLabel headerLabel; private JLabel statusLabel; private JPanel controlPanel; public SwingTester(){ prepareGUI(); } public static void main(String[] args){ SwingTester swingControlDemo = new SwingTester(); swingControlDemo.showTableDemo(); } private void prepareGUI(){ mainFrame = new JFrame("Java Swing Examples"); mainFrame.setSize(500,700); mainFrame.setLayout(new GridLayout(3, 1)); mainFrame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent windowEvent){ System.exit(0); } }); headerLabel = new JLabel("", JLabel.CENTER); statusLabel = new JLabel("",JLabel.CENTER); statusLabel.setSize(350,100); controlPanel = new JPanel(); controlPanel.setLayout(new FlowLayout()); mainFrame.add(headerLabel); mainFrame.add(controlPanel); mainFrame.add(statusLabel); mainFrame.setVisible(true); } private void showTableDemo(){ headerLabel.setText("Control in action: JTree"); // Create a root tree item as department DefaultMutableTreeNode department = new DefaultMutableTreeNode("Department"); //create other tree items as department names DefaultMutableTreeNode salesDepartment = new DefaultMutableTreeNode("Sales"); DefaultMutableTreeNode marketingDepartment = new DefaultMutableTreeNode("Marketing"); DefaultMutableTreeNode manufacturingDepartment = new DefaultMutableTreeNode("Manufacturing"); //create other tree items as employees DefaultMutableTreeNode employee1 = new DefaultMutableTreeNode("Robert"); DefaultMutableTreeNode employee2 = new DefaultMutableTreeNode("Joe"); DefaultMutableTreeNode employee3 = new DefaultMutableTreeNode("Chris"); //add employees to sales department salesDepartment.add(employee1); salesDepartment.add(employee2); salesDepartment.add(employee3); //create other tree items as employees DefaultMutableTreeNode employee4 = new DefaultMutableTreeNode("Mona"); DefaultMutableTreeNode employee5 = new DefaultMutableTreeNode("Tena"); //add employees to marketing department marketingDepartment.add(employee4); marketingDepartment.add(employee5); //create other tree items as employees DefaultMutableTreeNode employee6 = new DefaultMutableTreeNode("Rener"); DefaultMutableTreeNode employee7 = new DefaultMutableTreeNode("Linda"); //add employees to sales department manufacturingDepartment.add(employee6); manufacturingDepartment.add(employee7); //add departments to department item department.add(salesDepartment); department.add(marketingDepartment); department.add(manufacturingDepartment); //create the tree with department as root node JTree tree = new JTree(department); JScrollPane treeView = new JScrollPane(tree); controlPanel.add(treeView); mainFrame.setVisible(true); } }
Output
swingexamples_tree.htm
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