Toolkit.getDefaultToolkit().getScreenResolution()
Hi I called Toolkit.getDefaultToolkit().getScreenResolution() to get my monitor screen resolution. It returns 96 dpi.
But as i check my monitor hardware specs, I found it was different. My monitor is 15.1 inch MultiSync LCD1530v and the hardware specs is found at http://www.necmitsubishi.com/products/home/product.cfm?productid=145&cfid=2239759&cftoken=98264266
It can can found that the resolution is 0.3 mm dot pitch, which turns out to be 1/0.03 * 2.54=84.8 dpi. I am a bit confused by this. Can someone help me in answering the following question?
1. what is the link between 96dpi in Toolkit and 0.3mm in hardware specs? Can one derive one from another? Thanks!
I have a 19 inch monitor and I too get 96 dpi. Is there something wrong with getScreenResolution()?
import java.awt.*;
public class TestMethods
public TestMethods()
public static void main(String[] args)
TestMethods testMethods1 = new TestMethods();
Toolkit toolkit= Toolkit.getDefaultToolkit();
Dimension screenSize= toolkit.getScreenSize();
int screenResolution= toolkit.getScreenResolution();
System.out.println("Screen size: " +screenSize);
System.out.println("Screen Resolution: " +screenResolution);
ran it 3 times and got
1600 X 1200
96
1280 X 1024
96
640 X 480
96
What's up with that?
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Java.lang.NoClassDefFoundError Toolkit.getDefaultToolkit
hi all
i got this error in a servlet.
i wrote it on my computer with no errors but, when i moved and executed it on a linux machine it doesn't work:
java.lang.NoClassDefFoundError at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:703)
at counter.count.createCounter(count.java:245)
the code is
images=Toolkit.getDefaultToolkit().getImage(imageSrc);
i think that the jdk version is the same on both the computers (1.4.0 or higher), and the code is the same!
why have i this problem
thanx
sandrohi rajesh
you don't know how i'm happy to see your answers!
i'm so desperate with this problem!
as you asked to me, this is the full stack trace that tomcat prints when i call my servlet:
javax.servlet.ServletException: Servlet execution threw an exception
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:432)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:386)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:534)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:530)
at java.lang.Thread.run(Thread.java:536)
root cause
java.lang.NoClassDefFoundError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:130)
at java.awt.Toolkit$2.run(Toolkit.java:712)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:703)
at counter.count.createCounter(count.java:231)
at counter.count.processRequest(count.java:176)
at counter.count.doGet(count.java:187)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:432)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:386)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:534)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:530)
at java.lang.Thread.run(Thread.java:536)
i don't know if there is some environment variable set up in a different way from my system (w2k) to the real server system (linux), also because i installed the jdk (1.4.0 on windows) without setting anything
if can help i'll post you soon the version of tomcat/jdk used by linux
thanx a lot
sandro -
Toolkit.getDefaultToolkit() in Java service never returns on Windows
I'm stumped by this problem. It appears to be specific to a single machine as I can reproduce it reliably there but not on other machines. I'm hoping someone has some thoughts on what could be going on.
Here's the scenario:
I have Tomcat 5 running as a service on a new installed Windows 2000 Server with up to date service packs and j2sdk1.4.2_06. The service is configure to run headless.
I have a webapp that performs simple image transformations using AWT and Java2D. Any invocation of Toolkit.getDefaultToolkit() never returns. The thread just sits there consuming no CPU and does not throw an exception. I've narrowed it further to a call to new sun.awt.windows.WToolkit() in getToolKit(). sun.awt.windows.WToolkit is the value of the system property awt.toolkit.
I can reproduce this exact behavior in a different scenario: the server is running sshd on cygwin. If I ssh to the server and run the following class, it also hangs at new sun.awt.windows.WToolkit().
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public static void main(String[] args)
System.out.println("awt.toolkit = " + System.getProperty("awt.toolkit"));
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I have tried j2sdk1.4.2_03 and jdk1.5 with the same results. I've replicated this second scenario (logging in over ssh) on another Windows 2000 server and do not see this behavior.
Any thoughts?
AlonOkay. Here's the fix...
The 'no video card' comment was actually pretty close. The issue appears to be with DirectDraw support. We found this by watching regmon as the testing code ran. Installing a new video driver may have addressed this but so does disabling using DirectDraw as described here:
http://java.sun.com/products/java-media/2D/forDevelopers/java2dfaq.html#dither
java -Dsun.java2d.noddraw=true
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Alon -
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Thank you for giving reply.
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* @author Tanmoy
* @Super Scientific Calculator
* @version 1.2010
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din.close();
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displayPanel.outputTextField.setText(output);
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Thank you. -
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Jason -
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Hi,everyone:
I met a problem when I used Toolkit.getDefaultToolkit().beep() .
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My Environment is as follows:
Hardware: Dell dimension 2400
OS : Windows 2003 Enterprise Edition
JDK : J2SDK1.4.2
Code :
Toolkit.getDefaultToolkit().beep();
(In java application)
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** Will you please tell me where to find evidence that this is a bit buggy?
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int cx = 50;
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String msg="";
public boolean mouseDown(Event e, int x, int y)
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B : Image source = Toolkit.getDefaultToolkit().getImage("");
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so I look at "javax.swing.ImageIcon" class :
<Part of ImageIcon source>
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if (image == null) { //This code is invaild.
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Do you thinking it?
Bug?getimage may not return null in the current implementation but they wanted maybe get sure that no nullpointerexception occures.
it's not a bug - it's a feature :-) -
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So I normally use
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~KZSo the rectangle is just to get the bounds of my screen right?Yes.
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page gets printed and moreover the formatting is
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line]. Can someone help?Yeah. Your best bet is either to put the editorpane in a scrollpane and just print what's visible, OR, you can take the print graphics object, convert it into a graphics2D object, and call scale on that by comparing component.getWidth/height to PageFormat.getImageableWidth/Height
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Please feel free to have and use this class, but please do not change the package or portray this as your own work
=============================
package tjacobs.print;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.print.*;
import javax.print.PrintException;
public class StandardPrint implements Printable, Pageable {
Component c;
SpecialPrint sp;
PageFormat mFormat;
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this.c = c;
if (c instanceof SpecialPrint) {
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this.sp = sp;
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job.setPageable(this);
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mFormat = pf;
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PrinterJob job = PrinterJob.getPrinterJob();
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Graphics2D g = (Graphics2D) im.getGraphics();
// PageFormat pf = sp.getPageFormat(pageNo);
// int width = im.getWidth(null);
// int height = im.getHeight(null);
// g.setColor(Color.WHITE);
// g.fillRect(0, 0, width, height);
// double hratio = height / pf.getHeight();
// double wratio = width / pf.getWidth();
// g.scale(hratio, wratio);
try {
sp.print(g, pf, pageNo);
catch(PrinterException pe) {
pe.printStackTrace();
g.dispose();
return im;
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mFormat = format;
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g.translate((int)format.getImageableX(), (int)format.getImageableY());
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if (pageNo > getNumberOfPages()) {
return Printable.NO_SUCH_PAGE;
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int vertical = getNumVerticalPages();
int horizontalOffset = (int) ((pageNo % horizontal) * format.getImageableWidth());
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double ratio = getScreenRatio();
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g.translate(-horizontal, -vertical);
if (sp != null) {
sp.printerPaint(g);
else {
c.paint(g);
g.translate(horizontal, vertical);
g.scale(ratio, ratio);
g.translate((int)-format.getImageableX(), (int)-format.getImageableY());
return Printable.PAGE_EXISTS;
public int getNumHorizontalPages() {
Dimension size = getJobSize();
int imWidth = (int)mFormat.getImageableWidth();
int pWidth = 1 + (int)(size.width / getScreenRatio() / imWidth) - (imWidth == size.width ? 1 : 0);
return pWidth;
private double getScreenRatio () {
double res = Toolkit.getDefaultToolkit().getScreenResolution();
double ratio = res / 72.0;
return ratio;
public int getNumVerticalPages() {
Dimension size = getJobSize();
int imHeight = (int)mFormat.getImageableHeight();
int pHeight = (int) (1 + (size.height / getScreenRatio() / imHeight)) - (imHeight == size.height ? 1 : 0);
return pHeight;
public int getNumberOfPages() {
return getNumHorizontalPages() * getNumVerticalPages();
public Printable getPrintable(int i) {
return this;
public PageFormat getPageFormat(int page) {
if (mFormat == null) {
PrinterJob job = PrinterJob.getPrinterJob();
mFormat = job.defaultPage();
return mFormat;
}>
Thanks much! -
Is it possible to print a JPanel from the application?
Hello,
Just a quick question: Is it possible to print a JPanel from your application? I have plotted a graph and I would like user to be able to print this with a click of a button (or similar)
Thanks very much for your help, its appreciated as always.
Harold ClementsIt is absolutely possible
Check out my StandardPrint class. Basically all you need to do is
(this is pseudocode. I don't remember the exact names of methods for all this stuff. Look it up if there's a problem)
PrinterJob pd = PrinterJob.createNewJob();
StandardPrint sp = new StandardPrint(yourComponent);
pd.setPageable(sp);
//if you want this
//pd.pageDialog();
pd.doPrint();You are welcome to have use and modify this class but please don't change the package or take credit for it as your own code.
StandardPrint.java
===============
package tjacobs.print;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.print.*;
import javax.print.PrintException;
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Component c;
SpecialPrint sp;
PageFormat mFormat;
boolean mScale = false;
boolean mMaintainRatio = true;
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this.c = c;
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sp = (SpecialPrint)c;
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this.sp = sp;
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return mScale;
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mScale = b;
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mMaintainRatio = b;
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job.setPageable(this);
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job.print();
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mFormat = pf;
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PrinterJob job = PrinterJob.getPrinterJob();
job.setPageable(p);
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if (sp != null) {
return sp.getPrintSize();
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public static Image preview (int width, int height, Printable sp, PageFormat pf, int pageNo) {
BufferedImage im = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
return preview (im, sp, pf, pageNo);
public static Image preview (Image im, Printable sp, PageFormat pf, int pageNo) {
Graphics2D g = (Graphics2D) im.getGraphics();
int width = im.getWidth(null);
int height = im.getHeight(null);
g.setColor(Color.WHITE);
g.fillRect(0, 0, width, height);
double hratio = height / pf.getHeight();
double wratio = width / pf.getWidth();
//g.scale(hratio, wratio);
try {
sp.print(g, pf, pageNo);
catch(PrinterException pe) {
pe.printStackTrace();
g.dispose();
return im;
public int print(Graphics gr, PageFormat format, int pageNo) {
mFormat = format;
if (pageNo > getNumberOfPages()) {
return Printable.NO_SUCH_PAGE;
Graphics2D g = (Graphics2D) gr;
g.drawRect(0, 0, (int)format.getWidth(), (int)format.getHeight());
g.translate((int)format.getImageableX(), (int)format.getImageableY());
Dimension size = getJobSize();
if (!isPrintScaled()) {
int horizontal = getNumHorizontalPages();
int vertical = getNumVerticalPages();
int horizontalOffset = (int) ((pageNo % horizontal) * format.getImageableWidth());
int verticalOffset = (int) ((pageNo / vertical) * format.getImageableHeight());
double ratio = getScreenRatio();
g.scale(1 / ratio, 1 / ratio);
g.translate(-horizontalOffset, -verticalOffset);
if (sp != null) {
sp.printerPaint(g);
else {
c.paint(g);
g.translate(horizontal, vertical);
g.scale(ratio, ratio);
else {
double ratio = getScreenRatio();
g.scale(1 / ratio, 1 / ratio);
double xScale = 1.0;
double yScale = 1.0;
double wid;
double ht;
if (sp != null) {
wid = sp.getPrintSize().width;
ht = sp.getPrintSize().height;
else {
wid = c.getWidth();
ht = c.getHeight();
xScale = format.getImageableWidth() / wid;
yScale = format.getImageableHeight() / ht;
if (getMaintainsAspect()) {
xScale = yScale = Math.min(xScale, yScale);
g.scale(xScale, yScale);
if (sp != null) {
sp.printerPaint(g);
else {
c.paint(g);
g.scale(1 / xScale, 1 / yScale);
g.scale(ratio, ratio);
g.translate((int)-format.getImageableX(), (int)-format.getImageableY());
return Printable.PAGE_EXISTS;
public int getNumHorizontalPages() {
Dimension size = getJobSize();
int imWidth = (int)mFormat.getImageableWidth();
int pWidth = 1 + (int)(size.width / getScreenRatio() / imWidth) - (imWidth == size.width ? 1 : 0);
return pWidth;
private double getScreenRatio () {
double res = Toolkit.getDefaultToolkit().getScreenResolution();
double ratio = res / 72.0;
return ratio;
public int getNumVerticalPages() {
Dimension size = getJobSize();
int imHeight = (int)mFormat.getImageableHeight();
int pHeight = (int) (1 + (size.height / getScreenRatio() / imHeight)) - (imHeight == size.height ? 1 : 0);
return pHeight;
public int getNumberOfPages() {
if (isPrintScaled()) return 1;
return getNumHorizontalPages() * getNumVerticalPages();
public Printable getPrintable(int i) {
return this;
public PageFormat getPageFormat(int page) {
if (mFormat == null) {
PrinterJob job = PrinterJob.getPrinterJob();
mFormat = job.defaultPage();
return mFormat;
} -
Code example of the day: StandardPrint
It's been a few years since I posted StandardPrint, so I figured I post it again
You are welcome to use and modify this class, but please don't change the package or erase the attribution, especially if you are in school
package tjacobs.print;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.awt.print.*;
import java.io.File;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import tjacobs.ui.menus.FileMenu;
import tjacobs.ui.util.WindowUtilities;
* This implements the Printable and Pageable java.awt.print interfaces
* Allows you to very easily and quickly generate a printout from a component or a SpecialPrint.
* @author Tom Jacobs
public class StandardPrint implements Printable, Pageable {
//standard print variables
Component c;
SpecialPrint sp;
PageFormat mFormat;
boolean mScale = false;
boolean mMaintainRatio = true;
//page number print
public static final int LEFT = 0;
public static final int RIGHT = 1;
public static final int CENTER = 4;
public static final int TOP = 2;
public static final int BOTTOM = 3;
private boolean mPrintPageNumber = false;
private Font mPageNumberFont;
private int hAlign = CENTER;
private int vAlign = BOTTOM;
//title vars
private String mTitle;
private Font mTitleFont;
public StandardPrint(Component c) {
this.c = c;
if (c instanceof SpecialPrint) {
sp = (SpecialPrint)c;
public StandardPrint(SpecialPrint sp) {
this.sp = sp;
public void setNumberFont(Font f) {
mPageNumberFont = f;
public Font getNumberFont () {
return mPageNumberFont;
public int getPageNumberHAlignment () {
return hAlign;
public int getPageNumberVAlignment() {
return vAlign;
public void setPageNumberHAlignment(int num) {
hAlign = num;
public void setPageNumberVAlignment(int num) {
vAlign = num;
public void setPrintPageNumber(boolean b) {
mPrintPageNumber = b;
public boolean getPrintPageNumber() {
return mPrintPageNumber;
protected void printPageNumber(Graphics g, PageFormat format, int pageNo) {
if (!getPrintPageNumber()) return;
Shape clip = g.getClip();
g.setClip(null);
if (mPageNumberFont != null) {
g.setFont(mPageNumberFont);
FontMetrics fm = g.getFontMetrics();
int height = fm.getHeight();
String pageStr = "" + (pageNo + 1);
int width = fm.stringWidth(pageStr);
int xspot = (int) (format.getWidth() - width) / 2;
if (getPageNumberHAlignment() == LEFT) {
xspot = (int) format.getImageableX();
} else if (getPageNumberHAlignment() == RIGHT) {
xspot = (int) (format.getWidth() - format.getImageableX() - format.getImageableWidth());
int yspot = (int) (format.getImageableY() + format.getImageableHeight() + 2 * height);
if (getPageNumberVAlignment() == TOP) {
yspot = (int) format.getImageableY() / 2 - height;
//yspot = (int) (format.getImageableY() + format.getImageableHeight() + 2 * height);
g.drawString(pageStr, xspot, yspot);
g.setClip(clip);
public String getTitle() {
return mTitle;
public Font getTitleFont () {
return mTitleFont;
public void setTitleFont(Font f) {
mTitleFont = f;
public void setTitle(String s) {
mTitle = s;
protected void printTitle(Graphics g, PageFormat format) {
if (mTitle == null) return;
Shape clip = g.getClip();
g.setClip(null);
if (mTitleFont != null) {
g.setFont(mTitleFont);
FontMetrics fm = g.getFontMetrics();
int height = fm.getHeight();
int width = fm.stringWidth(mTitle);
int xspot = (int) (format.getWidth() - width) / 2;
int yspot = (int) format.getImageableY() / 2 + height;
g.drawString(mTitle, xspot, yspot);
g.setClip(clip);
public boolean isPrintScaled () {
return mScale;
public void setPrintScaled(boolean b) {
mScale = b;
public boolean getMaintainsAspect() {
return mMaintainRatio;
public void setMaintainsAspect(boolean b) {
mMaintainRatio = b;
public void start() throws PrinterException {
PrinterJob job = PrinterJob.getPrinterJob();
if (mFormat == null) {
mFormat = job.defaultPage();
job.setPageable(this);
if (job.printDialog()) {
job.print();
public void setPageFormat (PageFormat pf) {
mFormat = pf;
public static void printStandardComponent (Pageable p) throws PrinterException {
PrinterJob job = PrinterJob.getPrinterJob();
job.setPageable(p);
job.print();
private Dimension getJobSize() {
if (sp != null) {
return sp.getPrintSize();
else {
return c.getSize();
public static Image preview (int width, int height, Printable sp, PageFormat pf, int pageNo) {
BufferedImage im = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
return preview (im, sp, pf, pageNo);
public static Image preview (Image im, Printable sp, PageFormat pf, int pageNo) {
return preview(im, sp, pf, pageNo, true);
public static Image preview (Image im, Printable sp, PageFormat pf, int pageNo, boolean doClipping) {
Graphics2D g = (Graphics2D) im.getGraphics();
int width = im.getWidth(null);
int height = im.getHeight(null);
double hratio = height / pf.getHeight();
double wratio = width / pf.getWidth();
if (doClipping) {
Rectangle rect = new Rectangle();
rect.x = (int) (pf.getImageableX() * (wratio));
rect.y = (int) (pf.getImageableY() * (hratio));
rect.width = (int) (pf.getImageableWidth() * (wratio));
rect.height = (int) (pf.getImageableHeight() * (hratio));
g.setColor(Color.GRAY);
g.fillRect(0, 0, width, height);
g.setClip(rect);
g.scale(wratio, hratio);
g.setColor(Color.WHITE);
g.fillRect(0, 0, (int) (width * 1 / wratio), (int) (height * 1 / hratio));
//g.fillRect(0, 0, (int) (width * wratio), (int) (height * hratio));
try {
sp.print(g, pf, pageNo);
catch(PrinterException pe) {
pe.printStackTrace();
g.dispose();
return im;
public int print(Graphics gr, PageFormat format, int pageNo) {
mFormat = format;
if (pageNo > getNumberOfPages()) {
return Printable.NO_SUCH_PAGE;
Graphics2D g = (Graphics2D) gr;
//wha?? don't know what this was doing in the code
//g.drawRect(0, 0, (int)format.getWidth(), (int)format.getHeight());
if (getTitle() != null) {
printTitle(g, format);
if (getPrintPageNumber()) {
printPageNumber(g, format, pageNo);
g.translate((int)format.getImageableX(), (int)format.getImageableY());
//Dimension size = getJobSize();
if (!isPrintScaled()) {
int horizontal = getNumHorizontalPages();
//don't need this I don't think
//int vertical = getNumVerticalPages();
int horizontalOffset = (int) ((pageNo % horizontal) * format.getImageableWidth());
int verticalOffset = (int) ((pageNo / horizontal) * format.getImageableHeight());
double ratio = getScreenRatio();
g.scale(1 / ratio, 1 / ratio);
g.translate(-horizontalOffset, -verticalOffset);
if (sp != null) {
sp.printerPaint(g);
else {
c.paint(g);
g.translate(horizontalOffset, verticalOffset);
g.scale(ratio, ratio);
else {
double ratio = getScreenRatio();
g.scale(1 / ratio, 1 / ratio);
double xScale = 1.0;
double yScale = 1.0;
double wid;
double ht;
if (sp != null) {
wid = sp.getPrintSize().width;
ht = sp.getPrintSize().height;
else {
wid = c.getWidth();
ht = c.getHeight();
xScale = format.getImageableWidth() / wid;
yScale = format.getImageableHeight() / ht;
if (getMaintainsAspect()) {
xScale = yScale = Math.min(xScale, yScale);
g.scale(xScale, yScale);
if (sp != null) {
sp.printerPaint(g);
else {
c.paint(g);
g.scale(1 / xScale, 1 / yScale);
g.scale(ratio, ratio);
g.translate((int)-format.getImageableX(), (int)-format.getImageableY());
return Printable.PAGE_EXISTS;
public int getNumHorizontalPages() {
Dimension size = getJobSize();
if (mFormat == null) mFormat = getPageFormat(0);
int imWidth = (int)mFormat.getImageableWidth();
int pWidth = 1 + (int)(size.width / getScreenRatio() / imWidth) - (imWidth / getScreenRatio() == size.width ? 1 : 0);
return pWidth;
private double getScreenRatio () {
double res = Toolkit.getDefaultToolkit().getScreenResolution();
double ratio = res / 72.0;
return ratio;
public int getNumVerticalPages() {
Dimension size = getJobSize();
int imHeight = (int)mFormat.getImageableHeight();
int pHeight = (int) (1 + (size.height / getScreenRatio() / imHeight)) - (imHeight == size.height ? 1 : 0);
return pHeight;
public int getNumberOfPages() {
if (isPrintScaled()) return 1;
return getNumHorizontalPages() * getNumVerticalPages();
public Printable getPrintable(int i) {
return this;
public PageFormat getPageFormat(int page) {
if (mFormat == null) {
PrinterJob job = PrinterJob.getPrinterJob();
mFormat = job.defaultPage();
return mFormat;
public static void main(String args[]) {
//final GradientPane gp = new GradientPane(400,400);
//JFrame jf = new JFrame("Standard Print Test");
//jf.add(gp);
JFrame jf = new JFrame("StandardPrint Test");
final JTextArea area = new JTextArea();
area.append("hello\n");
for (int i = 0; i < 50; i++) {
area.append("\n");
area.append("world\n");
JScrollPane sp = new JScrollPane(area);
jf.add(sp);
JMenuBar bar = new JMenuBar();
FileMenu fm = new FileMenu() {
private static final long serialVersionUID = 1L;
public void load(File f) {}
public void save(File f) {}
public Pageable getPageable() {
//return new StandardPrint(gp);
return new StandardPrint(area);
JMenu printMenu = new JMenu("Print");
JMenuItem print = new JMenuItem("Print");
printMenu.add(print);
ActionListener al = new ActionListener() {
public void actionPerformed(ActionEvent ae) {
StandardPrint sp = new StandardPrint(area);
sp.setTitle("Hello World");
sp.setPrintPageNumber(true);
sp.setPageNumberVAlignment(BOTTOM);
sp.setPageNumberHAlignment(CENTER);
System.out.println(sp.getNumberOfPages());
Image im1 = preview(300,300, sp, sp.getPageFormat(0), 0);
Image im2 = preview(300,300, sp, sp.getPageFormat(1), 1);
JLabel l = new JLabel(new ImageIcon(im1));
WindowUtilities.visualize(l, false);
l = new JLabel(new ImageIcon(im2));
WindowUtilities.visualize(l, false);
print.addActionListener(al);
jf.setJMenuBar(bar);
bar.add(fm);
bar.add(printMenu);
jf.setBounds(100,100,400,400);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setVisible(true);
* Interface for using StandardPrint with something other than a Component or something
* that needs special printing
public static interface SpecialPrint {
public Dimension getPrintSize();
public void printerPaint(Graphics g);
}And SpecialPrint
* Interface for using StandardPrint with something other than a Component or something
* that needs special printing
* @author tjacobs
public interface SpecialPrint {
public Dimension getPrintSize();
public void printerPaint(Graphics g);
} -
How do i get the system resolution?
ya ^^
How do i get the system resolution?
thx natejava.awt.Toolkit.getDefaultToolkit().getScreenSize();
java.awt.Toolkit.getDefaultToolkit().getScreenResolution();
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