java program (Tree)

Java program to perform operation on Tree in java

import javax.swing.*;

import javax.swing.tree.*;

import java.awt.*;

import javax.swing.*;

import java.awt.event.*;

public class pst25 extends JApplet

{

       JTree tree;

       JTextField jtf,jsp;

       public void init()

       {

              Container contentPane=getContentPane();

              contentPane.setLayout(new FlowLayout());

             

              DefaultMutableTreeNode top=new DefaultMutableTreeNode("JComponent");

             

              DefaultMutableTreeNode p=new DefaultMutableTreeNode("Applet");

              top.add(p);

      

              DefaultMutableTreeNode a1=new DefaultMutableTreeNode("window");

              p.add(a1);

              DefaultMutableTreeNode a2=new DefaultMutableTreeNode("Panel");

              p.add(a2);

              DefaultMutableTreeNode a3=new DefaultMutableTreeNode("object");

              p.add(a3);

             

              DefaultMutableTreeNode a4=new DefaultMutableTreeNode("container");

              p.add(a4);

              DefaultMutableTreeNode a5=new DefaultMutableTreeNode("Jpanel");

              p.add(a5);

              DefaultMutableTreeNode a6=new DefaultMutableTreeNode("frame");

              p.add(a6);

              DefaultMutableTreeNode a7=new DefaultMutableTreeNode("Jtree");

              p.add(a7);

      

              tree=new JTree(top);

      

              int v=ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED;      

              int h=ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;

              JScrollPane jsp=new JScrollPane(tree,v,h);

      

              contentPane.add(jsp,BorderLayout.CENTER);

              jtf=new JTextField("",20);

             

             

              contentPane.add(jtf,BorderLayout.SOUTH);

              tree.addMouseListener(new MouseAdapter()

       {

              public void museClicked(MouseEvent me)

              {

              doMouseClicked(me);

              }

       });

}

       void doMouseClicked(MouseEvent me)

       {

              TreePath tp=tree.getPathForLocation(me.getX(),me.getY());

              if(tp != null)

              jtf.setText(""+tp);

              else

              jtf.setText("");

       }

      }

              /*

<applet code="pst25" width=100 height=200>

</applet>

*/
output:

 

Java program to perform operation on Tree in java and show selected path

import javax.swing.*;

import javax.swing.tree.*;

import java.awt.*;

import javax.swing.*;

import java.awt.event.*;

public class pst26 extends JApplet

{

       JTree tree;

       JTextField jtf,jsp;

       public void init()

       {

              Container contentPane=getContentPane();

              contentPane.setLayout(new FlowLayout());

             

              DefaultMutableTreeNode top=new DefaultMutableTreeNode("A");

             

              DefaultMutableTreeNode p=new DefaultMutableTreeNode("F");

              top.add(p);

      

              DefaultMutableTreeNode a2=new DefaultMutableTreeNode("G");

              p.add(a2);

              DefaultMutableTreeNode a3=new DefaultMutableTreeNode("J");

              p.add(a3);

              DefaultMutableTreeNode a4=new DefaultMutableTreeNode("T");

              p.add(a4);

             

              DefaultMutableTreeNode a5=new DefaultMutableTreeNode("Q");

              p.add(a5);

              DefaultMutableTreeNode a6=new DefaultMutableTreeNode("N");

              p.add(a6);

              DefaultMutableTreeNode a7=new DefaultMutableTreeNode("W");

              p.add(a7);

             

      

              tree=new JTree(top);

      

              int v=ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED;      

              int h=ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;

             

      

              JScrollPane jsp=new JScrollPane(tree,v,h);

              contentPane.add(jsp,BorderLayout.CENTER);

             

              jtf=new JTextField("",20);

              contentPane.add(jtf,BorderLayout.SOUTH);

             

              tree.addMouseListener(new MouseAdapter()

       {

              public void museClicked(MouseEvent me)

              {

              doMouseClicked(me);

              }

       });

}

       void doMouseClicked(MouseEvent me)

       {

              TreePath tp=tree.getPathForLocation(me.getX(),me.getY());

              if(tp != null)

              jtf.setText(""+tp);

              else

              jtf.setText("");

   
}
}   
 /*

<applet code="pst26.java" width=100 height=200>

</applet>

*/
OUTPUT: