Monitoring Java Program Memory usage

=========================================

package Myprojects.jmemorydemo;


import Javax.swing.UIManager;


import java.awt.*;


public class Jmemorydemo {


Private Boolean packframe = false;


public Jmemorydemo () {


MainFrame frame = new MainFrame ();


if (packframe) {


Frame.pack ();


}


else {


frame.validate ();


}


Dimension screensize = Toolkit.getdefaulttoolkit (). Getscreensize ();


Dimension framesize = Frame.getsize ();


if (Framesize.height > Screensize.height) {


framesize.height = screensize.height;


}


if (Framesize.width > Screensize.width) {


framesize.width = screensize.width;


}


Frame.setlocation ((screensize.width-framesize.width)/2, (screensize.height-framesize.height)


/2);


frame.setvisible (TRUE);


}


public static void Main (string[] args)


{


new Jmemorydemo ();


}


}


===================================================


package Myprojects.jmemorydemo;


import javax.swing.*;


public class Progressthread extends Thread {


JProgressBar Pbar;


JLabel label;


public Progressthread (jprogressbar Pbar,jlabel label) {


This.pbar=pbar;


This.label=label;


}


public void Run () {


int min=0;


int max=100;


int free=0;


int totle=0;


int status=0;


pbar.setminimum (min);


Pbar.setmaximum (max);


pbar.setvalue (status);


while (true) {


try{


totle= (int) (Runtime.getruntime (). TotalMemory ()/1024);


free= (int) (Runtime.getruntime (). Freememory ()/1024);


}catch (Exception e) {


E.printstacktrace ();


}


Label.settext ("Free Memory:" + (int) (Runtime.getruntime (). Freememory ()/1024) + "K" + "Totle Memory, Allo


cated: "


+ (int) (Runtime.getruntime (). TotalMemory ()/1024) + "K");


status= (int) (free*100/totle);


pbar.setvalue (status);


pbar.setstring ("Free momery" + status+ "%");


try{


this.sleep (1000);


}catch (interruptedexception err) {}


}


}


}


===============================================


package Myprojects.jmemorydemo;


Import java.awt.*;


import java.awt.event.*;


import javax.swing.*;


public class MainFrame extends JFrame {


private JPanel ContentPane;


private BorderLayout borderLayout1 = new BorderLayout ();


private JProgressBar jProgressBar1 = new JProgressBar ();


private JLabel JLabel1 = new JLabel ();


private JLabel JLabel2 = new JLabel ();


public MainFrame () {


enableevents (Awtevent.window_event_mask);


try {


Jbinit ();


}


catch (Exception e) {


E.printstacktrace ();


}


}


private void Jbinit () throws Exception {


(MainFrame.class.getResource ("[Your Icon]"));


ContentPane = (JPanel) this.getcontentpane ();


contentpane.setlayout (BORDERLAYOUT1);


This.setsize (New Dimension (304, 215));


this.settitle ("Jmemorydemo");


Jlabel1.setfont (New Java.awt.Font ("Dialog", 0, 14));


jlabel1.sethorizontalalignment (Swingconstants.center);


jlabel1.settext ("Memory Monitor");


jprogressbar1.setorientation (jprogressbar.vertical);


Jprogressbar1.setfont (New Java.awt.Font ("Dialog", 0, 14));


Jprogressbar1.settooltiptext ("");


jprogressbar1.setstringpainted (TRUE);


Jlabel2.setfont (New Java.awt.Font ("Dialog", 0, 14));


Jlabel2.settext ("");


Contentpane.add (jProgressBar1, Borderlayout.center);


Contentpane.add (JLabel1, Borderlayout.north);


Contentpane.add (JLabel2, Borderlayout.south);


progressthread pThread = new Progressthread (THIS.JPROGRESSBAR1,THIS.JLABEL2);


Pthread.start ();


}


protected void processWindowEvent (WindowEvent e) {


super.processwindowevent (e);


if (e.getid () = = windowevent.window_closing) {


system.exit (0);


}


}


}

======================================================================

The prompts are as follows:

======================================================================

The key to the problem:

totle= (int) (Runtime.getruntime (). TotalMemory ()/1024);

free= (int) (Runtime.getruntime (). Freememory ()/1024);