How to read system memory size, processor speed of a system
Hi all,
How to read system memory size, processor speed of a system and how to read how much of it are in use in a running system. (using java)
any help would be great.
-thanks
How to read system memory size, processor speed of a
system and how to read how much of it are in use in a
running system. (using java)Using Java: not at all. You'll need JNI.
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Your friend ZoeHi,
There is no java class for reading event log in windows, so we can do one thing we can use windows system 32 VBS script to read the system log .
The output of this command can be read using java program....
we can use java exec for executing this system32 vbs script.
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plz refer cscript,wscript
import java.io.*;
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Zoe -
How to read system evenlog using java program in windows
How to read system evenlog using java program in windows???
is there any java class available to do this ? or any one having sample code for this?
Your friend ZoeWelcome to the Sun forums.
>
How to read system evenlog using java program in windows???>
JNI. (No.)
>
is there any java class available to do this ? or any one having sample code for this?>You will generally get better help around here if you read the documentation, try some sample code and come back with a specific question (hopefully with an SSCCE included).
>
Your friend Zoe>(raised eyebrow) Thank you for sharing that with us.
Note also that one '?' denotes a question, while 2 or more generally denotes a dweeb. -
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Something read wrong. The slowest FP iMac was 700mHz.
While in OSX, can you see if 10.1 has its own version of System Profiler? In newer OSX versions it's in Applications >Utilties.
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Hello Abaper's
I have generated a XML file for the data of internal table (with 10 Records). When i download , i can see the XML file for the Entire 10 Records.
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Regards
JvHi,
DATA : filename TYPE rlgrap-filename.
DATA : doc_name TYPE char30.
DATA : bin_size TYPE i.
SELECT matnr matkl meins
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i_filename = filename
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TABLES
i_tab_sap_data = it_mara " contains 10 Records
CHANGING
i_tab_converted_data = it_xmltab.
placing XML File in Appl. Server
DATA : FNAME(60) VALUE 'xyz_File'.
DATA : num TYPE i.
DATA : xmldata(256) TYPE x.
For Writing The data in Application Server
OPEN DATASET FNAME FOR OUTPUT IN BINARY MODE. " ENCODING DEFAULT.
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TRANSFER wa_xmltab TO FNAME.
ENDLOOP.
ELSE.
MESSAGE e004(zmsg5) WITH 'File FNAME not opened'.
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DO.
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WRITE :/ xmldata.
Clear xmldata.
ELSE.
EXIT.
ENDIF.
ENDDO.
CLOSE DATASET FNAME.
at runtime i can see
it_mara --> contain 10 records
it_xmltab --> contain 7 lines (Each line size is 255 char). This table have XML format data, (unknow format , with all numeric
digits)
it_xmltab is trasferred to application server , but the xml format is generated upto 4 records, and for the remaining records
the XML format is not generated.
the XML data in application server file is
<?xml version="1.0"?><TY_MARA><TY_MARA><MATNR Datatype="C" Length="36">0-BUY1</MATNR><MATKL Datatype="C" Length="18">012</MATKL><MEINS Datatype="C" Length="6">PC
</MEINS>
</TY_MARA><TY_MARA><MATNR Datatype="C" Length="36">0-BUY2</MATNR><MATKL Datatype="C" Length="18">012</MATKL><MEINS Datatype="C" Length="6">
PC </MEINS>
</TY_MARA><TY_MARA><MATNR Datatype="C" Length="36">000000000000000001</MATNR><MEINS Datatype="C" Length="6">EA</MEINS>
</TY_MARA><TY_MARA><MATNR Datatype="C" Length="36">000000000000000002</MATNR
Regards
JV -
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Shish
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.util.Date;
import javax.swing.*;
import javax.swing.border.EtchedBorder;
import javax.swing.border.TitledBorder;
public class MemoryMonitor extends JPanel {
static JCheckBox dateStampCB = new JCheckBox("Output Date Stamp");
public Surface surf;
JPanel controls;
boolean doControls;
JTextField tf;
public MemoryMonitor() {
note=n;
setLayout(new BorderLayout());
setBorder(new TitledBorder(new EtchedBorder(), "Memory Monitor"));
add(surf = new Surface());
controls = new JPanel();
controls.setPreferredSize(new Dimension(135,80));
Font font = new Font("serif", Font.PLAIN, 10);
JLabel label = new JLabel("Sample Rate");
label.setFont(font);
label.setForeground(Color.black);
controls.add(label);
tf = new JTextField("1000");
tf.setPreferredSize(new Dimension(45,20));
controls.add(tf);
controls.add(label = new JLabel("ms"));
label.setFont(font);
label.setForeground(Color.black);
controls.add(dateStampCB);
dateStampCB.setFont(font);
addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
removeAll();
if ((doControls = !doControls)) {
surf.stop();
add(controls);
} else {
try {
surf.sleepAmount = Long.parseLong(tf.getText().trim());
} catch (Exception ex) {note.alert(ex);}
surf.start();
add(surf);
validate();
repaint();
public void start() {
surf.start();
public class Surface extends JPanel implements Runnable {
public Thread thread;
public long sleepAmount = 1000;
private int w, h;
private BufferedImage bimg;
private Graphics2D big;
private Font font = new Font("Times New Roman", Font.PLAIN, 11);
private Runtime r = Runtime.getRuntime();
private int columnInc;
private int pts[];
private int ptNum;
private int ascent, descent;
private float freeMemory, totalMemory;
private Rectangle graphOutlineRect = new Rectangle();
private Rectangle2D mfRect = new Rectangle2D.Float();
private Rectangle2D muRect = new Rectangle2D.Float();
private Line2D graphLine = new Line2D.Float();
private Color graphColor = new Color(46, 139, 87);
private Color mfColor = new Color(0, 100, 0);
private String usedStr;
public Surface() {
setBackground(Color.black);
addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
if (thread == null) start(); else stop();
public Dimension getMinimumSize() {
return getPreferredSize();
public Dimension getMaximumSize() {
return getPreferredSize();
public Dimension getPreferredSize() {
return new Dimension(135,80);
public void paint(Graphics g) {
if (big == null) {
return;
big.setBackground(getBackground());
big.clearRect(0,0,w,h);
float freeMemory = (float) r.freeMemory();
float totalMemory = (float) r.totalMemory();
// .. Draw allocated and used strings ..
big.setColor(Color.green);
big.drawString(String.valueOf((int) totalMemory/1024) + "K allocated", 4.0f, (float) ascent+0.5f);
usedStr = String.valueOf(((int) (totalMemory - freeMemory))/1024)
+ "K used";
big.drawString(usedStr, 4, h-descent);
// Calculate remaining size
float ssH = ascent + descent;
float remainingHeight = (float) (h - (ssH*2) - 0.5f);
float blockHeight = remainingHeight/10;
float blockWidth = 20.0f;
float remainingWidth = (float) (w - blockWidth - 10);
// .. Memory Free ..
big.setColor(mfColor);
int MemUsage = (int) ((freeMemory / totalMemory) * 10);
int i = 0;
for ( ; i < MemUsage ; i++) {
mfRect.setRect(5,(float) ssH+i*blockHeight,
blockWidth,(float) blockHeight-1);
big.fill(mfRect);
// .. Memory Used ..
big.setColor(Color.green);
for ( ; i < 10; i++) {
muRect.setRect(5,(float) ssH+i*blockHeight,
blockWidth,(float) blockHeight-1);
big.fill(muRect);
// .. Draw History Graph ..
big.setColor(graphColor);
int graphX = 30;
int graphY = (int) ssH;
int graphW = w - graphX - 5;
int graphH = (int) remainingHeight;
graphOutlineRect.setRect(graphX, graphY, graphW, graphH);
big.draw(graphOutlineRect);
int graphRow = graphH/10;
// .. Draw row ..
for (int j = graphY; j <= graphH+graphY; j += graphRow) {
graphLine.setLine(graphX,j,graphX+graphW,j);
big.draw(graphLine);
// .. Draw animated column movement ..
int graphColumn = graphW/15;
if (columnInc == 0) {
columnInc = graphColumn;
for (int j = graphX+columnInc; j < graphW+graphX; j+=graphColumn) {
graphLine.setLine(j,graphY,j,graphY+graphH);
big.draw(graphLine);
--columnInc;
if (pts == null) {
pts = new int[graphW];
ptNum = 0;
} else if (pts.length != graphW) {
int tmp[] = null;
if (ptNum < graphW) {
tmp = new int[ptNum];
System.arraycopy(pts, 0, tmp, 0, tmp.length);
} else {
tmp = new int[graphW];
System.arraycopy(pts, pts.length-tmp.length, tmp, 0, tmp.length);
ptNum = tmp.length - 2;
pts = new int[graphW];
System.arraycopy(tmp, 0, pts, 0, tmp.length);
} else {
big.setColor(Color.yellow);
pts[ptNum] = (int)(graphY+graphH*(freeMemory/totalMemory));
for (int j=graphX+graphW-ptNum, k=0;k < ptNum; k++, j++) {
if (k != 0) {
if (pts[k] != pts[k-1]) {
big.drawLine(j-1, pts[k-1], j, pts[k]);
} else {
big.fillRect(j, pts[k], 1, 1);
if (ptNum+2 == pts.length) {
// throw out oldest point
for (int j = 1;j < ptNum; j++) {
pts[j-1] = pts[j];
--ptNum;
} else {
ptNum++;
g.drawImage(bimg, 0, 0, this);
public void start() {
thread = new Thread(this);
thread.setPriority(Thread.MIN_PRIORITY);
thread.setName("MemoryMonitor");
thread.start();
public synchronized void stop() {
thread = null;
notify();
public void run() {
Thread me = Thread.currentThread();
while (thread == me && !isShowing() || getSize().width == 0) {
try {
thread.sleep(500);
} catch (InterruptedException e) { return; }
while (thread == me && isShowing()) {
Dimension d = getSize();
if (d.width != w || d.height != h) {
w = d.width;
h = d.height;
bimg = (BufferedImage) createImage(w, h);
big = bimg.createGraphics();
big.setFont(font);
FontMetrics fm = big.getFontMetrics(font);
ascent = (int) fm.getAscent();
descent = (int) fm.getDescent();
repaint();
try {
thread.sleep(sleepAmount);
} catch (InterruptedException e) { break; }
if (MemoryMonitor.dateStampCB.isSelected()) {
System.out.println(new Date().toString() + " " + usedStr);
thread = null;
public static void main(String s[]) {
final MemoryMonitor demo = new MemoryMonitor();
WindowListener l = new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}
public void windowDeiconified(WindowEvent e) { demo.surf.start(); }
public void windowIconified(WindowEvent e) { demo.surf.stop(); }
JFrame f = new JFrame("Java2D Demo - MemoryMonitor");
f.addWindowListener(l);
f.getContentPane().add("Center", demo);
f.pack();
f.setSize(new Dimension(200,200));
f.setVisible(true);
demo.surf.start(); -
Reading the memory size of a machine
Dear all,
I'm writing a java program that can read the size of the memory (RAM) of a machine. Does anyone have an idea as to whether this can be done in Java, and if so, what libraries to use.
Thanks
Regards,Here's an old thread about the same issue (please search before you post) : http://forum.java.sun.com/thread.jspa?threadID=701152&messageID=4067516 .
PS - ChuckBing also answered that one... Nice :P -
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Hi....
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