Java Add, Edit, Remove JTree Node
How To Insert Update Delete Selected Node From JTree Using Java NetBeans
In this Java Tutorial we will see How To Add Edit Remove The Selected JTree Node Using DefaultMutableTreeNode + DefaultMutableTreeNode + TreeSelectionModel + The JTextFields Value On JTree Mouse Clicked Event To Get The Selected Node And 3 Button To Do The Insert, Update, Delete In Java Programming Language And NetBeans IDE .
Project Source Code:
private void jTree1MouseClicked(java.awt.event.MouseEvent evt) {
// Display Selected Node Text Into JTextFields
TreeSelectionModel smd = jTree1.getSelectionModel();
if(smd.getSelectionCount() > 0){
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) jTree1.getSelectionPath().getLastPathComponent();
jTextField1.setText(selectedNode.getUserObject().toString());
}
}
private void jButtonAddActionPerformed(java.awt.event.ActionEvent evt) {
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) jTree1.getSelectionPath().getLastPathComponent();
DefaultMutableTreeNode newNode = new DefaultMutableTreeNode(jTextField1.getText());
selectedNode.add(newNode);
// reload jtree model
DefaultTreeModel model = (DefaultTreeModel)jTree1.getModel();
model.reload();
}
private void jButtonEditActionPerformed(java.awt.event.ActionEvent evt) {
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) jTree1.getSelectionPath().getLastPathComponent();
selectedNode.setUserObject(jTextField1.getText());
// reload jtree model
DefaultTreeModel model = (DefaultTreeModel)jTree1.getModel();
model.reload();
}
private void jButtonEdit1ActionPerformed(java.awt.event.ActionEvent evt) {
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) jTree1.getSelectionPath().getLastPathComponent();
if(selectedNode != jTree1.getModel().getRoot())
{
DefaultTreeModel model = (DefaultTreeModel)jTree1.getModel();
model.removeNodeFromParent(selectedNode);
model.reload();
}
}
OutPut:
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