Display System File Example,Displaying System Files in JTree,Display System Files Using Java Swing

Displaying System Files in JTree

In this section, you will learn to create a JTree that displays system files. The java.util.properties package represents a persistent set of properties for displaying the system files in a tree.

Description of the program:

This program teaches to display all system files in a tree on the frame. First of all you need a frame that displays the system files in a tree. The getProperties() displays the current values of system and returns the system objects. Create a tree using JTree() constructor with system property. The setLookAndFeel() method sets look and feel of the generated tree. This method takes a string argument ("com.sun.java.swing.plaf.windows.WindowsLookAndFeel") that displays the formatting design of the tree. If you want to display the root node, you must be use setRootVisibles(true) method.

getProperties():
This method displays the current values of system and searchs the property with the specified key in the properties list.

Here is the code of this program:


import javax.swing.*;

import javax.swing.event.*;

import java.util.Properties;

import javax.swing.JTree.*;



public class FileDirectoryTree{

  public static void main(String[] args) {

    try {

      UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");

      JFrame fm = new JFrame("System file properties of tree ");

      Properties p = System.getProperties();

      JTree tree = new JTree(p);

      tree.setRootVisible(true);

      JScrollPane scrollpane = new JScrollPane(tree);

      fm.getContentPane().add(scrollpane, "Center");

      fm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

      fm.setSize(450,400);

      fm.setVisible(true);

    }

    catch (Exception e) {}

  }

}

Output this program:

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