Finding Java System Properties

// File: io/properties/
// Description: Shows system properties.  This must be an application.
//              An applet can't get this information.
// Author: Fred Swartz
// Date:   2 Feb 2005

import java.awt.*;
import javax.swing.*;
import java.util.*;

/** Generic main program. */
public class SysPropList {
    public static void main(String[] args) {
        JFrame window = new JFrame("System Properties");
        window.setContentPane(new SysPropListGUI());

/** Panel to display the (limited) GUI intereface. */
class SysPropListGUI extends JPanel {
    JTextArea m_propertiesTA = new JTextArea(20, 40);

    /** Constructor sets layout, adds component(s), sets values*/
    public SysPropListGUI() {
        this.setLayout(new BorderLayout());
        this.add(new JScrollPane(m_propertiesTA), BorderLayout.CENTER);

        //... Add property list data to text area.
        Properties pr = System.getProperties();

	// TreeSet sorts keys
        TreeSet propKeys = new TreeSet(pr.keySet());  
        for (Iterator it = propKeys.iterator(); it.hasNext(); ) {
            String key = (String);
            m_propertiesTA.append("" + key + "=" + pr.get(key) + "n");

[My Video Promotion]
  1. All About Java Garbage Collection : Types, Algorithms, Advantages and Disadvantages
  2. Java Static Import Explained With Easy Example With Source Code
  3. SQL Example To Create Table On MySql DB
  4. Book Review – Drools JBoss Rules 5.X Developer’s Guide by Micahal Bali (Packt Publishing)
  5. List of valid @suppresswarning annotation parameters in Java for Eclipse and IBM RAD IDE
  6. Finding Java System Properties
  7. List of Major Java 7 Features – How java programming language has changed in JDK 7
  8. Date From Timestamp in Long format
  9. How to resolve – java.lang.VerifyError java.lang.SecurityException: Signers of org.junit.runner.Runner do not match signers of other classes in package
  10. Complete List Of Java Keywords
  11. List of 25 Plus Devices That Run On Java
  12. What is the difference between java and javaw?
  13. These 100 plus programming languages run on Java Virtual machine (List)
  14. Read XML File In JAVA using DOM – A Simple Tutorial
Tagged , , , , , , , , , , , , . Bookmark the permalink.

5 Responses to Read XML File In JAVA using DOM – A Simple Tutorial

  1. harry says:

    I need a tutorial on an exact opposite of this excellent article. That is I need to serialize Java Object to XML. Can you help me in that Kushal??? I wud appreciate it a lot.


  2. Jim says:

    Hey Kushal!
    This is very great and helpful, but I got another question about that. If I have an Element which hasn’t any values, I always get a NullpointerException. Do you have an Idea how to fix/catch that?

    Thank you!

  3. Mridula says:

    The advantage in Java is that there it is not necessary to take care of objects which are no longer used. Garbage collector takes care of these objects unlike C/C++ language where because of this issue the program terminates causing OutOfMemoryErrors.

  4. priya says:

    Garbage collection is one of the most important feature of Java. Garbage collection is also called automatic memory management as JVM automatically removes the unused variables/objects (value is null) from the memory.

Leave a Reply to priya Cancel reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.