JAVA程序实现监视----JAVA程序内存使用情况不知道好不好用有空研究一下

JAVA程序实现监视----JAVA程序内存使用情况(转)不知道好不好用有空研究一下
代码:
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(304215));
this.setTitle("JMemoryDemo");
jLabel1.setFont(
new java.awt.Font("Dialog"014));
jLabel1.setHorizontalAlignment(SwingConstants.CENTER);
jLabel1.setText(
"Memory Monitor");
jProgressBar1.setOrientation(JProgressBar.VERTICAL);
jProgressBar1.setFont(
new java.awt.Font("Dialog"014));
jProgressBar1.setToolTipText(
"");
jProgressBar1.setStringPainted(
true);
jLabel2.setFont(
new java.awt.Font("Dialog"014));
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);
}

}

}



 问题的关键:

  totle=(int)(Runtime.getRuntime().totalMemory()/1024);

  free=(int)(Runtime.getRuntime().freeMemory()/1024);

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