Java JTree

Java JTree

Java JTree is used to display data in a structured manner.It has root node at the top which is the parent for all other nodes.

How to Declare Java JTree

[class JTree extends JComponent implements Scrollable, Accessible
 
 
]

Java JTree used constructors

  • JTree()-creates a JTree with a sample model.
  •  JTree(Object [] value)-creates a  JTree of every element in an array.
  •  JTree(TreeNode root)-creates  JTree specified with TreeNode as its root.

Java JTree Example

[
import javax.swing.tree.DefaultMutableTreeNode;

import javax.swing.JFrame;
import javax.swing.JTree;
public class JavaJTreeExample  extends JFrame{
    JavaJTreeExample()
    {
        super("JTree Example");
        DefaultMutableTreeNode style=new DefaultMutableTreeNode("Style");
        DefaultMutableTreeNode color=new DefaultMutableTreeNode("color");
        DefaultMutableTreeNode font=new DefaultMutableTreeNode("font");
        style.add(color);
        style.add(font);

        DefaultMutableTreeNode red=new DefaultMutableTreeNode("red");
        DefaultMutableTreeNode blue=new DefaultMutableTreeNode("blue");
        DefaultMutableTreeNode black=new DefaultMutableTreeNode("black");

        color.add(red);    color.add(black);    color.add(blue);
        JTree tree=new JTree(style);
        add(tree);



        setSize(400,400);
        setVisible(true);
    }
    public static void main(String args[])
    {
        new JavaJTreeExample();
    }


}

]
See also:

Java JSeparator

Java  JProgressBar


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