Java 2D and Text Rendering Problems.

First off, there are so many lines in that stack trace that its meaningless...

If you simply read the errors then you'll know what to do to fix it... for example:

1) Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException... Well, do you have a null sending prevention if statement? There you go... Maybe you're sending some String or other value that is set to null, try putting a

if ( value != null )

{

DealWithValue( value );

}

I wanna know how that works out.

ImGonnaTryAgaina at 2007-7-14 20:35:07 >

Here is the class that displays the IfGraphic

[IFGraphic Class

public class IfGraphic extends Graphic

{

private String cond;

private String condText;

private Color t;

private int tSize;

private Color f;

private int fSize;

private boolean rightArrow;

private boolean leftArrow;

public boolean leftSide;

private boolean hasElse;

//constructor

public IfGraphic(int viewSize, int draw, String conditions, boolean inHasElse)

{

try

{

cond = conditions;

hasElse = inHasElse;

jbInit(viewSize,draw,conditions);

}

catch(Exception e)

{

e.printStackTrace();

}

}

//Initialisation

private void jbInit(int viewSize, int draw, String conditions) throws Exception

{

t = Color.red;

f = Color.red;

tSize = 0;

fSize = 0;

leftArrow = false;

rightArrow = false;

drawOrder=draw;

percentage =viewSize;

size = (new Dimension (viewSize,viewSize));

this.setSize(size);

this.setVisible(true);

cond = getConditions();

if (cond.length() < 10)

condText = cond;

else

condText=cond.substring(0,10) +"...";

}//=========================================================================

//============================================================================

//Method: getConditionsReturns: String

//Gets the conditions (arguments) as a string

//============================================================================

public String getConditions()

{

return cond;

}

//============================================================================

//Method: setConditionsParams: String

//Sets the conditions (arguments) as a string

//============================================================================

public void setCondtions(String conditions)

{

cond = conditions;

}

//============================================================================

//Method: flowHighlightingparams: boolean

//Turns clickColor on

//============================================================================

public void flowHiglighting(boolean b, boolean selTrue)

{

mouseOverThis = b;

colorChange();

//if tIs True then highlight T

if (selTrue == false)

{

t = Color.yellow;

f = Color.red;

tSize = 10;

fSize = 0;

rightArrow = true;

leftArrow = false;

}else//highlight the F

{

f = Color.yellow;

t = Color.red;

tSize = 0;

fSize = 10;

leftArrow = true;

rightArrow = false;

}

this.repaint();

}//===========================================================================

//============================================================================

//Method: getArrowState()Returns: int

//Returns true if the left side of the if is selected and false if the right

//side is selected

//============================================================================

public boolean getArrowState()

{

boolean retBool = false;

if (leftArrow == true & rightArrow ==false)

retBool = true;

else if (leftArrow == false & rightArrow == true)

retBool = false;

else if (leftArrow == rightArrow)

retBool = false;

return retBool;

}

//============================================================================

//============================================================================

//Method: click()params: boolean

//Turns clickColor on

//============================================================================

public void click(boolean b)

{

clickThis = b;

colorChange();

}//===========================================================================

//============================================================================

//Method: colorChange()

//Changes the color based on the color states

//============================================================================

public void colorChange()

{

if (animThis == true)

{

this.setBackground(animColor);

}else if (clickThis == true)

{

this.setBackground(clickColor);

}else if (mouseOverThis == true)

{

this.setBackground(mouseOverColor);

}else

{

t = Color.red;

f = Color.red;

rightArrow = false;

leftArrow = false;

tSize = 0;

fSize = 0;

this.setBackground(null);

}//end if

this.repaint();

}//===========================================================================

//============================================================================

//Method: paint

//Performs the actual draw of the component

//============================================================================

public void paint (Graphics G )

{

//diamond points

int xValues[]={s(50),s(99),s(50),s(1)};

int yValues[]={s(33),s(63),s(92),s(63)};

super.paint (G);

Graphics2D g2d = (Graphics2D)G;

g2d.setColor(Color.black);

g2d.setStroke(new BasicStroke(s(6)));

g2d.draw(new Line2D.Double(s(50), s(0), s(50),s(63)));

g2d.draw(new Line2D.Double(s(0), s(63), s(100),s(63)));

g2d.setStroke(new BasicStroke(s(1)));

//The fill of the component

GradientPaint gradient = new GradientPaint (s(53), s(50), new Color(250,150,250), s(50), s(90), Color.white); // true means to repeat pattern

g2d.setPaint( gradient);

//the outline of the component

g2d.fillPolygon(xValues,yValues,4);

g2d.setColor(Color.black);

g2d.drawPolygon(xValues,yValues,4);

g2d.setColor(Color.BLACK);

g2d.setStroke(new BasicStroke(s(5)));

if (rightArrow == true)

{

g2d.drawLine(s(50),s(33),s(99),s(63));

g2d.drawLine (s(99), s(63),s(50),s(92));

}

else if (leftArrow == true)

{

g2d.drawLine (s(50), s(92),s(1),s(63));

g2d.drawLine(s(1),s(63),s(50),s(33));

}

//The text of the component

g2d.setColor(Color.black);

G.setFont(new Font("SansSerif", Font.BOLD, s(12)));

//if the if has an else show this in its name

if (hasElse == false)

G.drawString("IF" ,s(48),s(49));

else

G.drawString("IF_E" ,s(40),s(49));

g2d.setColor(Color.blue);

g2d.drawString(condText ,s(20),s(67));

G.setFont(new Font("SansSerif", Font.BOLD, s(14+fSize)));

g2d.setColor(f);

G.drawString("F",s((fSize/2)),s(59));

G.setFont(new Font("SansSerif", Font.BOLD, s(14+tSize)));

g2d.setColor(t);

G.drawString("T",s(92-(tSize/2)),s(59));

//g2d.create();

}//===========================================================================

}//=============================================================================

[Graphic

IfGraphic inherits from this class.

public class Graphic extends JPanel

{

protected Dimension size = new Dimension();

protected int percentage;

protected int drawOrder;

//The colours

protected Color clickColor;

protected Color mouseOverColor;

protected Color animColor;

//The color states

boolean clickThis;

boolean mouseOverThis;

boolean animThis;

//the general font used for the components

protected Font gFont;

//============================================================================

//No argument constructor

//============================================================================

public Graphic()

{

this.setDoubleBuffered(true);

this.setBackground(null);

//The color defaults

clickColor = new Color (220,220,220);

mouseOverColor = new Color (160,160,160);

animColor = new Color(255,255,255);

//the default color states

clickThis = false;

mouseOverThis = false;

animThis = false;

}//===========================================================================

//============================================================================

//Constructor with arguments

//============================================================================

public Graphic(int viewSize, int draw)

{

try

{

drawOrder = draw;

this.setDoubleBuffered(true);

this.setBackground(null);

//the color defaults

clickColor = new Color (220,220,220);

mouseOverColor = new Color (160,160,160);

animColor = new Color(255,255,255);

//the default color states

clickThis = false;

mouseOverThis = false;

animThis = false;

}

catch(Exception e)

{

e.printStackTrace();

}

}//===========================================================================

//============================================================================

//Method: colorChange()

//Changes the color based on the color states

//============================================================================

public void colorChange()

{

if (animThis == true)

{

this.setBackground(animColor);

}else if (clickThis == true)

{

this.setBackground(clickColor);

}else if (mouseOverThis == true)

{

this.setBackground(mouseOverColor);

}else

{

this.setBackground(null);

}//end if

this.repaint();

}//===========================================================================

//============================================================================

//Method: click()params: boolean

//Turns clickColor on

//============================================================================

public void click(boolean b)

{

clickThis = b;

colorChange();

}//===========================================================================

//============================================================================

//Method: mouseOver()params: boolean

//Turns clickColor on

//============================================================================

public void mouseOver(boolean b)

{

mouseOverThis = b;

colorChange();

}//===========================================================================

//============================================================================

//Method: click()params: boolean

//Turns clickColor on

//============================================================================

public void anim(boolean b)

{

animThis = b;

colorChange();

}//===========================================================================

//============================================================================

//Method: getClickColor()Returns: Color

//Returns mouseClick color of the component

//============================================================================

public Color getClickColor()

{

return clickColor;

}//===========================================================================

//============================================================================

//Method: getAnimColor()Returns: Color

//Returns animation color of the component

//============================================================================

public Color getAnimColor()

{

return animColor;

}//===========================================================================

//============================================================================

//Method: getMouseOverColor()Returns: color

//Returns mouseOver color of the component

//============================================================================

public Color getMouseOverColor()

{

return mouseOverColor;

}//===========================================================================

//============================================================================

//Method: setClickColor()Params: Color

//Sets mouseOver color of the component

//============================================================================

public void setCLickColor(Color c)

{

clickColor = c;

}//===========================================================================

//============================================================================

//Method: seAnimrColor()Params: Color

//Sets mouseOver color of the component

//============================================================================

public void setAnimColor(Color c)

{

animColor = c;

}//===========================================================================

//============================================================================

//Method: setMouseOverColor()Params: Color

//Sets mouseOver color of the component

//============================================================================

public void setMouseOverColor(Color c)

{

mouseOverColor = c;

}//===========================================================================

//============================================================================

//Method: getDrawOrder Returns: Int

//Gets the Draw Order for this component

//============================================================================

public int getDrawOrder()

{

return drawOrder;

}//end getDrawOrder===========================================================

//============================================================================

//Method: setDrawOrder Params: Int

//Sets the Draw Order for this component

//============================================================================

public void setDrawOrder (int d)

{

drawOrder = d;

}//end setDrawOrder

//============================================================================

//============================================================================

//Method: setDimensionsParams: Dimension

//set dimensions for this component

//============================================================================

public void setDimension (Dimension d)

{

size = d;

}//===========================================================================

//============================================================================

//Method: sParams: int

//scales int to percentage

//============================================================================

public int s (int n)

{

float x=n;

if (x !=0)

n=(int)((x/100)*percentage);

return n;

}//===========================================================================

}//END OF CLASS=================================================================

Thanks

Andrew.

Message was edited by:

scottie_uk

Message was edited by:

scottie_uk

Message was edited by:

scottie_uk

Message was edited by:

scottie_uk

Message was edited by:

scottie_uk

scottie_uka at 2007-7-14 20:35:07 >

Ok thanks for your reply:

However, that did not fix the problem. I have just received the same problem from a simpler class:

To invoke these classes I am iterating through an arraylist of objects and calling the relevant Graphic class (If or Terminator e.t.c) based on the paramiters comming from the objects extracted from this list.

It works 90% of the time. The problems are very random and do not happen with the same grapgic object each time. Although the TerminatorGraphic (Shown below) tends to be the most common class to fail.

The NPE tends to reference this line of code:

G.drawString("Terminate" ,s(22),s(78));

with which I see nothing wrong.

The problem began to appear when I swiched from Java Graphics to Java Graphics 2D. Before then it never gave me any problems.

If it helps I am using Oracle-JDeveloper 10G with its Oracle JDK.

package GPTool;

import java.awt.geom.Line2D;

import java.awt.geom.RoundRectangle2D;

import javax.swing.*; import java.awt.*; import java.awt.event.*;

import java.awt.Dimension;

import java.awt.Color;

public class TerminatorGraphic extends Graphic

{

//Constructor=================================================================

public TerminatorGraphic(int viewSize, int draw)

{

try

{

jbInit(viewSize, draw);

}

catch(Exception e)

{

e.printStackTrace();

}

}//===========================================================================

//Initialisation==============================================================

private void jbInit(int viewSize, int draw) throws Exception

{

drawOrder=draw;

percentage =viewSize;

size = (new Dimension (viewSize,viewSize));

this.setPreferredSize(size);

this.setSize(size);

}//=========================================================================

//============================================================================

//Method: paint

//Performs the actual drawing of the component

//============================================================================

public void paint (Graphics G )

{

super.paint (G);

Graphics2D g2d = (Graphics2D)G;

gFont = new Font("SansSerif", Font.BOLD, s(12));//set up the default font

//the thick line

g2d.setColor(Color.black);

g2d.setStroke(new BasicStroke(s(6)));

g2d.draw(new Line2D.Double(s(50), s(0), s(50),s(100)));

g2d.setStroke(new BasicStroke(s(1)));

//the oval

GradientPaint gradient = new GradientPaint (s(50), s(50), Color.cyan, s(50), s(100), Color.white); // true means to repeat pattern

g2d.setPaint( gradient);

g2d.fill(new RoundRectangle2D.Double(s(5),s(50),s(89),s(50),s(60),s(100)));

//the oval outline

g2d.setColor(Color.black);

g2d.drawRoundRect(s(5),s(50),s(89),s(50),s(60),s(100));

//the text of the component

G.setFont(gFont);

G.drawString("Terminate" ,s(22),s(78));

}//===========================================================================

}//=============================================================================

Thanks

Andrew.

Message was edited by:

scottie_uk

scottie_uka at 2007-7-14 20:35:07 >

> No I dont think it is a video driver issue. All the

> computers it has been tested on a vastly different

> with respect to graphics cards.

>

> However, If I deploy the project as a Jar file the

> problem no longer presists.

>

> Could this be a problem with the Oracle JDK (using

> Oricle JDeveloper). This development uses its own

> JDK. When running the Jar file the system uses the

> Sun JDK.

>

> However, both JDK's are v1.5.

I believe JDeveloper uses the Sun JDK. Depending on how you acquire JDeveloper, the JDK may or may not be bundled with a JDK, but the JDK itself is Sun's. JDeveloper does have a custom VM available, but I suspect that isn't the source of the problem.

Search your file system for rogue copies of the class files which are giving you the exceptions. It is possible that you have extra copies of older versions of these classes lying around on the classpath, and these old copies are being detected by the VM before the latest and greatest version.A symptom of this problem is line numbers in the stack trace not corresponding to the correct method call in the source file.

Creating a JAR file and running it will bypass the rogue copies of the classes and the strange behavior associated with them.

Niceguy1a at 2007-7-14 20:35:07 >

Ok, I've got exactly the same problem.

I was so glad to find that someone else is complaining about this problem. I've been searching for more than five days now until I bumped into this forum.

Ok, it seems its a JDeveloper issue. Since I'm having the same issue under JDeveloper 10g.

I'll try it on Suns JDK 6 and reply back.

basilaa at 2007-7-14 20:35:07 >

I suspect that this is not an issue with JDev so much as with the JDK used to run your app. In JDeveloper 10.1.3, we ship the JDK 5 update 6 (1.5.0_06). You might want to try downloading a more recent JDK 5 (currently 1.5.0_11) or even Java SE 6. To configure your project in JDev to use the newly downloaded JDK, go to Project Properties, and go to the Libraries and Classpath page. From there, click on Change next to the Java SE version field and provide the details for your downloaded JDK.

-- Brian

Oracle JDeveloper

Product Management Team

brian_frya at 2007-7-21 9:58:58 >