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import java.awt.BorderLayout;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JTree;
import javax.swing.UIManager;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
public class MainClass extends JFrame {
JTree tree;
DefaultTreeModel treeModel;
public MainClass() {
super("Tree Test Example");
setSize(200, 150);
setDefaultCloseOperation(EXIT_ON_CLOSE);
UIManager.put("Tree.leafIcon", new ImageIcon("leafIcon.gif"));
UIManager.put("Tree.openIcon", new ImageIcon("openIcon.gif"));
UIManager.put("Tree.closedIcon", new ImageIcon("closedIcon.gif"));
UIManager.put("Tree.expandedIcon", new ImageIcon("expandedIcon.gif"));
UIManager.put("Tree.collapsedIcon", new ImageIcon("collapsedIcon"));
}
public void init() {
DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root");
DefaultMutableTreeNode subroot = new DefaultMutableTreeNode("SubRoot");
DefaultMutableTreeNode leaf1 = new DefaultMutableTreeNode("Leaf 1");
DefaultMutableTreeNode leaf2 = new DefaultMutableTreeNode("Leaf 2");
treeModel = new DefaultTreeModel(root);
tree = new JTree(treeModel);
treeModel.insertNodeInto(subroot, root, 0);
subroot.add(leaf1);
root.add(leaf2);
tree.putClientProperty("JTree.lineStyle", "Angled");
getContentPane().add(tree, BorderLayout.CENTER);
}
public static void main(String args[]) {
MainClass tt = new MainClass();
tt.init();
tt.setVisible(true);
}
}
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