Drawing 2d graphics

Sorry, does anybody know the most convenient way to draw graphics? f.e to draw graphic just on two vectors of points X and Y. Rrd4J is not enough good because rrd works with time.

To whom it may be interest.
This is a small example to draw a chart having "values on X" and "values on Y" :-) using JFreeChart
import java.awt.Font;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import junit.framework.TestCase;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
public class SimpleChartTest extends TestCase {
     private XYSeriesCollection createDataset() {
          XYSeriesCollection result = new XYSeriesCollection();
          XYSeries s3 = new XYSeries("P", true, false);
          s3.add(0, 2.355450986);
          s3.add(0.5, 2.799548641);
          s3.add(1.5, 3.614688072);
          s3.add(11.5, 8.283364855);
          s3.add(12.5, 8.534275028);
          s3.add(13.5, 8.762648582);
          s3.add(14.5, 8.971407287);
          s3.add(15.5, 9.163180317);
          s3.add(16.5, 9.340328068);
          s3.add(17.5, 9.504964014);
          s3.add(19.5, 9.804039109);
          s3.add(20.5, 9.941644878);
          result.addSeries(s3);
          return result;
     private JFreeChart createChart(XYDataset dataset) {
          JFreeChart chart = ChartFactory.createXYLineChart(null,
                    "Value on X", "Value on Y", dataset, PlotOrientation.VERTICAL, true,
                    true, false);
          TextTitle t1 = new TextTitle("Title1", new Font(
                    "SansSerif", Font.BOLD, 14));
          TextTitle t2 = new TextTitle(
                    "Title2",
                    new Font("SansSerif", Font.PLAIN, 11));
          chart.addSubtitle(t1);
          chart.addSubtitle(t2);
          XYPlot plot = chart.getXYPlot();
          NumberAxis domainAxis = (NumberAxis) plot.getDomainAxis();
          domainAxis.setUpperMargin(0.12);
          domainAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
          NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
          rangeAxis.setAutoRangeIncludesZero(false);
          return chart;
     public void test() throws IOException {
          XYSeriesCollection dataset = createDataset();
          JFreeChart chart = createChart(dataset);
          BufferedImage image = chart.createBufferedImage(360, 500);
          File file = new File("test-data/charts/newimage.png");
ImageIO.write(image, "png", file);
}

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Drawing 2D graphics with no frame or no panel ?

Hi,
I would like to know if it is possible to draw 2D graphics directly over the OS(windows2002) ? like drawing a rectangle over the desktop without any JPanel or JFrame.
cheers,
sletourne

It is possible, I've done it ;-)
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import java.awt.event.*;
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Is there anyway to draw a Graphics object on another Graphics object? I'm trying to show 2 screens, side by side, on a Canvas and I'm trying to cheat a little :-P Basically, I want to take half of one screen and half of another and put them on top of each other to form one screen.
OR is there a way to turn a Graphics object into an Image object?

I'm not sure if this is what you're after, but you can
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hope that helps. =)

Can somebody help me out? I need a Corel Draw (.cdr) graphic converted to Illustrator

I'm trying to get a logo from brandsoftheworld.com but the one I want is in .CDR. I don't have Corel Draw (who does anymore) but I see that Illustrator 6 can open it. Unfortunately, I'm still on CS5.5. Can somebody help me out?

Send it to me. I'll save it as an EPS file for you.
Bob AT theindesignguy DOT com
TwitchOSX <mailto:[email protected]>
Thursday, January 24, 2013 7:11 PM
>
Can somebody help me out? I need a Corel Draw (.cdr) graphic
converted to Illustrator
created by TwitchOSX <http://forums.adobe.com/people/TwitchOSX> in
/InDesign/ - View the full discussion
<http://forums.adobe.com/message/5020999#5020999

Inability to draw simple graphics in Java properly (threads and JFrame)

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I don't see any problem when I run the program but.. In general you shouldn't paint directly on a frame by overloading the paint method. You should rather create a custom component on which you draw.
But if you do overload paint, make sure you call super.paint before doing anything else.
More information in this tutorial: http://java.sun.com/docs/books/tutorial/uiswing/painting/index.html

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If I draw a rounded rectangle from top to bottom, the corners are nicely rounded. If I draw the rectangle from bottom to top the entire shape is rounded instead of just the corners. How can I draw from bottom to top and still round just the corners?
<?xml version="1.0" encoding="utf-8"?>
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Drawing 2D Graphics in the center of a JPanel

Hi,
Below is my GUI. The basic idea is, I want this to create a neat UI on any machine with any monitor resolution settings. Because I dont really know what will be the resolution of the target machine, I do not perform a setPreferred size on any component. I have several problems here.
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import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.LayoutManager;
import java.awt.Toolkit;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
@SuppressWarnings("serial")
public class MainFrame extends JFrame {
public MainFrame() {
createAndShowGUI();
private void createAndShowGUI() {
initMainFrame();
initMenus();
initPanels();
initContentPane();
setVisible(true);
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setExtendedState(MAXIMIZED_BOTH);
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getContentPane().add(contentPane);
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contentPane.setRightComponent(rightpanel);
contentPane.setOpaque(true);
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exitMenu.setActionCommand(EXIT_COMMAND);
file.add(exitMenu);
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setJMenuBar(menub);
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try {
new MainFrame();
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e.printStackTrace();
System.exit(0);
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private JPanel rightTab = new JPanel();
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int x;
int y;
Coordinates(int x, int y) {
this.x = x;
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Hi,
The getSize worked perfectly for me. But what I tried doing now is that, instead of just the simple centering of the rectangle, i did this
1. When the dimension of the rectangle is smaller than the Panel.getSize(), do centering as usual
2. else when the rectangle is bigger, say because its width was longer than Panel.getSize().getWidth(), I center the rectangle only on its Height, and set the preferred size of the Panel to (rectangle.getWidth(), panel.getSize().getHeight()). And I call revalidate, so that the scrollbars appear.
Problem im running into now is that, once I do a setPreferredSize, everytime I use a getSize later on, i always get the same size. But what I want to see is that, when the rectangle can fit in the panel, i want it centered without any scrollbars, but when it cannot fit on the width, i want it to appear centered on height, but have a horizontal scroll bar.
I'd be really grateful, if you could help me with this.
Here is the code
public void paintComponent(Graphics g) {
          super.paintComponents(g);
          Coordinates centerOfPanel = getCenterCoordinates();
          g.drawRoundRect(centerOfPanel.x, centerOfPanel.y, RECT_WIDTH, RECT_HEIGHT, 10, 10);
          //preferredSize might have changed, call revalidate
          revalidate();
public static final int PANEL_MARGIN = 50;
public Coordinates getCenterCoordinates() {
          setPreferredSize(null);
          Dimension panelDimension = getSize();
          Dimension myPreferredSize = new Dimension();
          if (panelDimension.width > RECT_WIDTH)
               myPreferredSize.width = panelDimension.width;
          else
               myPreferredSize.width = RECT_WIDTH + 2 * PANEL_MARGIN; // MARGIN on left end and right end
          if (panelDimension.height > RECT_HEIGHT)
               myPreferredSize.height = panelDimension.height;
          else
               myPreferredSize.height = RECT_HEIGHT + 2 * PANEL_MARGIN; // MARGIN on top and bottom
          System.out.println("Panel size is " + getSize());
          setPreferredSize(myPreferredSize);
          System.out.println("Preferred size is " + myPreferredSize);
          //center of the panel.
          int x = (myPreferredSize.width - RECT_WIDTH) / 2;
          int y = (myPreferredSize.height - RECT_HEIGHT) / 2;
          return new Coordinates(x,y);
     }

Help in drawing graphics.

Hi friends,
I'm newbie in drawing graphics with Java, and I need some help in a specific part of my program.
What I want to do is to draw a waveform of a sound file. That waveform is built based on the amplitude of each sound sample. So I have a big vector full of those amplitudes. Now what I need to do is plot each point on the screen. The x coordinate of the point will be its time position in the time axis. The y coordinate of the point will be the amplitude value. Ok... Now I have a lot of doubts...
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Thanks for all, in advance.
Leonardo
(Brazil)

This will lead you, in this sample you have a panel and a button,
every click will fill a vector with random 700 points and draw them on the panel,
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import java.awt.event.*;
import java.util.*;
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               System.exit(0);
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     add("South",cont);
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          int y = (int)(Math.random()*350);
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public class WPanel extends Panel
     Vector   points;
public WPanel()
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     this.points = points;
     repaint();
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          Point p2 = (Point)points.get(j);
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public static void main (String[] args)
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Noah

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hi,
I have a problem in drawing the graphic components like rectangle,oval etc. I need to draw them on a panel after selecting a xml file from menu,parse it first, based on the contents of the parsed file the dimentions of the component should change.
however i am able to parse the file and save the parsed contents in a separate file, but unable to draw components using its contents

this is the module given to me where i am supposed to
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ya i have good knowlege of swings,IO and awt...Parse the XML file filling a model that allows listeners (Observer/Observable is one approach). When the parsing is complete fire an event to indicate that the model has changed. Have your GUI listen to the model and when it receive the 'changed' event it updates it's display according to the content of the model.

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Mmh, differences between versions aside, you are pretty much getting what you are asking. Any compressed format will have a hard time with perependicular lines and lots of high fequency detail (text, the coil spirals). There's really no way to avoid that otehr than to draw thr graphic differently, i.e. not use straight lines and a different way of presenting the text callouts. Also, you could massively improve perception by having the graphic move with a simple slow pan. the motion will lead to a more favorable distribution of the pixels across the scanlines, as the content changes every frame and in addition, motion blur will help to reduce flicker. Lastly, give the graphic some finesse by perhaps making the lines white and adding a dark outer glow to separate them from the background. these blended areas also help to reduce artifacts that appear with harsh transitions on straight lines. If it's an option , you might even want to use color for the + and - cabling (usually blue and red). As Wade suggested, you might try rendering to a different spec, but depending on what your intended final output is, this may not help at all, so working a bit on the graphic might pay off more.
Mylenium

How to make Graphics a separate thread.

Hi all!
I am performing dense 2D Delaunay triangulation on the Java Graphics context. I don't want to add any "sleeps" there in my code, so my app eats about 95-98% of CPU resources. I am becoming unable to normally use any components (i.e. buttons, combos etc) in my app because they are stuck and will responde after 10 secs or more. I tried to get out and did the things specified below.
Assuming I have the following code:
import javax.swing.*;
import java.awt.*;
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int count = 0;
int loop = 100;
Graphics g0 = null;
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}After the crash my JVM(1.4.2_01-b06 on WinXP) says me "good bye" with this message or a similar long one with the whole dll list:
Another exception has been detected while we were handling last error.
Dumping information about last error:
ERROR REPORT FILE = (N/A)
PC = 0x02eb7516
SIGNAL = -1073741819
FUNCTION NAME = Java_sun_print_Win32PrintJob_endPrintRawData
OFFSET = 0x13E2
LIBRARY NAME = C:\JBuilderX\jdk1.4\jre\bin\awt.dll
Please check ERROR REPORT FILE for further information, if there is any.
Good bye.
An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : EXCEPTION_ACCESS_VIOLATION (0xc0000005) occurred at PC=0x2EB7516
Function=Java_sun_print_Win32PrintJob_endPrintRawData+0x13E2
Library=C:\JBuilderX\jdk1.4\jre\bin\awt.dll
Current Java thread:
at sun.awt.windows.Win32DDRenderer.doDrawLineDD(Native Method)
at sun.awt.windows.Win32DDRenderer.clipAndDrawLine(Win32DDRenderer.java:76)
at sun.awt.windows.Win32DDRenderer.drawLine(Win32DDRenderer.java:126)
As I described, the crash happens only when I use drawLine()/draw()/drawRect() or another standard method of Graphics/Graphics2D context except drawString() method.
Did you try to solve a problem like mine is? Can you provide a RIGHT(I know that mine is simple, wrong and dummy ) alternative for separation of Graphics thread from the main one?
Thank you guys for at least reading my post
Waiting for a shameful reply to this message!
Goodbye!

Don't draw the graphics in the AWT event queue thread.
Draw them in the main thread and repaint the
component that displays them as they become
available. The basics of a component like that are
shown in message 15 this thread:
http://forum.java.sun.com/thread.jsp?forum=31&thread=55
795&start=15&range=15&hilite=false&q=
In the same thread under the reply #19 u wrote:
The problem with drawing in the paintComponent() method is that it executes in the GUI thread and this >slows down the rest of the GUI. Many of my GUI apps involve mathematical transformations to images >which take too long to run inside paintComponent().I have the same problem though I am overriding the paint() method, i.e. my GUI thread is being hung even I use the paint() method. Forget about the code above, so there is no thread spawning, no MAX_PRIORITY and no paint()/repaint() recursivity. Did you fixed that problem by such a double buffering like action you specified in the reply #15?
Thx!

How to use a Graphics Object in a JSP?

Hello, I do not know if this is a good or a silly question. Can anyone tell me if we can use a Graphics object in a JSP. For example to draw a line or other graphics, i am planning to use the JSP. Any help is much appreciated.
Regards,
Navin Pathuru.

Hi Rob or Jennifer, could you pour some light here.
I have not done a lot of research for this, but what i want to do is below the polygon i would like to display another image object like a chart... is it possible? If so how to do it? Any help is much appreciated.
here is the code:
<%
// Create image
int width=200, height=200;
BufferedImage image = new BufferedImage(width,
height, BufferedImage.TYPE_INT_RGB);
// Get drawing context
Graphics g = image.getGraphics();
// Fill background
g.setColor(Color.white);
g.fillRect(0, 0, width, height);
// Create random polygon
Polygon poly = new Polygon();
Random random = new Random();
for (int i=0; i < 5; i++) {
poly.addPoint(random.nextInt(width),
random.nextInt(height));
// Fill polygon
g.setColor(Color.cyan);
g.fillPolygon(poly);
// Dispose context
g.dispose();
// Send back image
ServletOutputStream sos = response.getOutputStream();
JPEGImageEncoder encoder =
JPEGCodec.createJPEGEncoder(sos);
encoder.encode(image);
%>
Regards,
Navin Pathuru

Line Drawing Script on Stage doesn't work in MovieClip?

I have a little snippet of code that allows the user to create a line with the mouse, and clears the line if they end up touching the hitbox with the mouse, while they're drawing the line. It works fine when it's just thrown onto the main timeline. However, when I try to encapsulate it within a movie clip, it suddenly doesn't work. At all. Are there any suggestions as to why this is happening? Here's the code.
function(){return A.apply(null,[this].concat($A(arguments)))}
var drawing:Boolean;
var my_line:MovieClip = new MovieClip();
this.addChild(my_line);
drawing = false;//to start with
stage.addEventListener(MouseEvent.MOUSE_DOWN, startDrawing);
stage.addEventListener(MouseEvent.MOUSE_MOVE, draw);
stage.addEventListener(MouseEvent.MOUSE_UP, stopDrawing);
function startDrawing(event:MouseEvent):void
//move to the correct starting position for drawing
my_line.graphics.lineStyle(3,0xFF0000);
my_line.graphics.moveTo( mouseX, mouseY);
if (drawBox.hitTestPoint(mouseX,mouseY,true))
drawing = true;
function draw(event:MouseEvent)
if (drawing)
my_line.graphics.lineTo(mouseX,mouseY);
if (oneHitBox.hitTestPoint(mouseX,mouseY,true))
   my_line.graphics.clear();//remove line
function stopDrawing(event:MouseEvent)
drawing = false;
Thanks for any help you can offer!

Oh! Haha, sorry, brainfart. That is all of the code that I use in that particular frame, where I want the user to be able to draw within the confines of the box. The only other code I use are for the drag and drop boxes, meant to be dropped onto a particular area. Those are working just fine, but if you want to see that code too, then:
function(){return A.apply(null,[this].concat($A(arguments)))}
/* Stop at This Frame
The Flash timeline will stop/pause at the frame where you insert this code.
Can also be used to stop/pause the timeline of movieclips.
stop();
/* Drag and Drop
Makes the specified symbol instance moveable with drag and drop.
lunchOff.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag);
function fl_ClickToDrag(event:MouseEvent):void
lunchOff.startDrag();
stage.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop);
function fl_ReleaseToDrop(event:MouseEvent):void
lunchOff.stopDrag();
if (lunchOff.hitTestObject(dropBoxTwo))
if (offDuty.hitTestObject(dropBoxThree) && onDuty.hitTestObject(dropBoxOne) && lunchOff.hitTestObject(dropBoxTwo))
   gotoAndStop(16);
   stage.focus = aBox;
else
lunchOff.x = -548.95;
lunchOff.y = -306.15;
/* Drag and Drop
Makes the specified symbol instance moveable with drag and drop.
offDuty.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag_2);
function fl_ClickToDrag_2(event:MouseEvent):void
offDuty.startDrag();
stage.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop_2);
function fl_ReleaseToDrop_2(event:MouseEvent):void
offDuty.stopDrag();
if (offDuty.hitTestObject(dropBoxThree))
if (offDuty.hitTestObject(dropBoxThree) && onDuty.hitTestObject(dropBoxOne) && lunchOff.hitTestObject(dropBoxTwo))
   gotoAndStop(16);
   stage.focus = aBox;;
else
offDuty.x = -557.0;
offDuty.y = -155.95;
/* Drag and Drop
Makes the specified symbol instance moveable with drag and drop.
onDuty.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag_3);
function fl_ClickToDrag_3(event:MouseEvent):void
onDuty.startDrag();
stage.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop_3);
function fl_ReleaseToDrop_3(event:MouseEvent):void
onDuty.stopDrag();
if (onDuty.hitTestObject(dropBoxOne))
if (offDuty.hitTestObject(dropBoxThree) && lunchOff.hitTestObject(dropBoxTwo))
   gotoAndStop(16);
   stage.focus = aBox;
else
onDuty.x = -539.00;
onDuty.y = 39.45;

Cannot resolve symbol class graphics

does anyone know what the error
cannot resolve symbol class graphics means?
with this code i can't seem to call the graphics method to draw the line....any reason why?
import javax.swing.*;
import java.*;
public class LineDraw extends JFrame {
    public static void main(String[] args) {
        LineDraw ld = new LineDraw();
        ld.setSize(500,500);
        ld.setVisible(true);
        ld.enterVariables();
    public void init(){
    private int x1;
    private int x2;
    private int y1;
    private int y2;
    public void paint(Graphics g) {
        g.GetGraphics(g);
        super.paintComponent(g);
        g.drawLine(x1, y1, x2, y2);
    public void enterVariables() {
        x1 = Integer.parseInt(JOptionPane.showInputDialog("Enter x1:"));
        y1 = Integer.parseInt(JOptionPane.showInputDialog("Enter y1:"));
        x2 = Integer.parseInt(JOptionPane.showInputDialog("Enter x2:"));
        y2 = Integer.parseInt(JOptionPane.showInputDialog("Enter y2:"));
        repaint();
}

well the exact error message is ...by the way now that i think about it
if the graphics method shoudl not be part of the JFrame class then what method would i use to draw 2D Graphics?
--------------------Configuration: <Default>--------------------
C:\Documents and Settings\c1s5\My Documents\LineDraw.java:21: cannot resolve symbol
symbol : class Graphics
location: class LineDraw
public void paint(Graphics g)
^
1 error
Process completed.
and the exact code is
import javax.swing.*;
import java.*;
public class LineDraw extends JFrame {
    public static void main(String[] args) {
        LineDraw ld = new LineDraw();
        ld.setSize(1024,500);
        ld.setVisible(true);
        ld.enterVariables();
    private int x1;
    private int x2;
    private int y1;
    private int y2;
    public void paint(Graphics g)
        super.paintComponent(g);
        g.drawLine(x1, y1, x2, y2);
    public void enterVariables() {
        x1 = Integer.parseInt(JOptionPane.showInputDialog("Enter x1:"));
        y1 = Integer.parseInt(JOptionPane.showInputDialog("Enter y1:"));
        x2 = Integer.parseInt(JOptionPane.showInputDialog("Enter x2:"));
        y2 = Integer.parseInt(JOptionPane.showInputDialog("Enter y2:"));
        repaint();
}

Drawing 2d graphics

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