How to find a node in a JTree Component with Java?

To find a node in a JTree component, use the getNextMatch() method. Here, wer are trying to find a node that begins with character “A”. The search begins from the node set below with begnRow variable −

int begnRow = 0; String prefix = "A"; TreePath treePath = tree.getNextMatch(prefix, begnRow, Position.Bias.Forward);

We have displayed the resultant node in the Console −

System.out.println("Node = "+treePath);

The following is an example to find a node in a JTree Component with Java −

package my; import javax.swing.JFrame; import javax.swing.JTree; import javax.swing.text.Position; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.TreePath; public class SwingDemo {    public static void main(String[] args) throws Exception {       JFrame frame = new JFrame("Demo");       DefaultMutableTreeNode node = new DefaultMutableTreeNode("Project");       DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("App");       DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("Website");       DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("WebApp");       node.add(node1);       node.add(node2);       node.add(node3);       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 WebApp");       node1.add(one);       node1.add(two);       node1.add(three);       node2.add(four);       node2.add(five);       node3.add(six);       JTree tree = new JTree(node);       int begnRow = 0;       String prefix = "A"; TreePath treePath = tree.getNextMatch(prefix, begnRow, Position.Bias.Forward); System.out.println("Node = "+treePath);       tree.setRowHeight(25);       frame.add(tree);       frame.setSize(550,400);       frame.setVisible(true);    } }

Output

The output is as follows. On running, the node which is to be found is visible −