java:2061)


at GP.paintComponent(Unknown Source)


at javax.swing.JComponent.paint(JComponent.java:808)


at javax.swing.JComponent.paintChildren(JComponent.java:647)


- locked <02EFB638> (a java.awt.Component$AWTTreeLock)


at javax.swing.JComponent.paint(JComponent.java:817)


at javax.swing.JComponent.paintChildren(JComponent.java:647)


- locked <02EFB638> (a java.awt.Component$AWTTreeLock)


at javax.swing.JComponent.paint(JComponent.java:817)


at javax.swing.JLayeredPane.paint(JLayeredPane.java:552)


at javax.swing.JComponent.paintChildren(JComponent.java:647)


- locked <02EFB638> (a java.awt.Component$AWTTreeLock)


at javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4778)


at javax.swing.JComponent.paintDoubleBuffered(JComponent.java:4724)


at javax.swing.JComponent.paint(JComponent.java:798)


at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:21)


at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:60)


at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:97)


at java.awt.Container.paint(Container.java:1309)


at sun.awt.RepaintArea.paint(RepaintArea.java:177)


at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:260)


at java.awt.Component.dispatchEventImpl(Component.java:3658)


at java.awt.Container.dispatchEventImpl(Container.java:1623)


at java.awt.Window.dispatchEventImpl(Window.java:1585)


at java.awt.Component.dispatchEvent(Component.java:3439)


at java.awt.EventQueue.dispatchEvent(EventQueue.java:450)


at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:1
97)


at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150
)


at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)


at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)


at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)

Dynamic libraries:
0x00400000 - 0x00406000 c:\winnt\system32\java.exe
x77F80000 - 0x77FFB000 C:\WINNT\System32\ntdll.dll
77DB0000 - 0x77E0B000 C:\WINNT\system32\ADVAPI32.dll
0x77E80000 - 0x77F31000 C:\WINNT\system32\KERNEL32.dll
0x77D30000 - 0x77DA1000 C:\WINNT\system32\RPCRT4.dll
0x78000000 - 0x78046000 C:\WINNT\system32\MSVCRT.dll
0x6D330000 - 0x6D45A000 C:\Program
Files\Java\j2re1.4.1_01\bin\client\jvm.dll
0x77E10000 - 0x77E6F000 C:\WINNT\system32\USER32.dll
0x77F40000 - 0x77F79000 C:\WINNT\system32\GDI32.dll
0x77570000 - 0x775A0000 c:\winnt\system32\WINMM.dll
0x6D1D0000 - 0x6D1D7000 C:\Program Files\Java\j2re1.4.1_01\bin\hpi.dll
0x6D300000 - 0x6D30D000 C:\Program Files\Java\j2re1.4.1_01\bin\verify.dll
0x6D210000 - 0x6D229000 C:\Program Files\Java\j2re1.4.1_01\bin\java.dll
0x6D320000 - 0x6D32D000 C:\Program Files\Java\j2re1.4.1_01\bin\zip.dll
0x6D000000 - 0x6D0FB000 C:\Program Files\Java\j2re1.4.1_01\bin\awt.dll
0x77800000 - 0x7781E000 c:\winnt\system32\WINSPOOL.DRV
0x76620000 - 0x76630000 C:\WINNT\system32\MPR.dll
0x75E60000 - 0x75E7A000 c:\winnt\system32\IMM32.dll
0x77A50000 - 0x77B45000 C:\WINNT\system32\ole32.dll
0x6D180000 - 0x6D1D0000 C:\Program
Files\Java\j2re1.4.1_01\bin\fontmanager.dll
0x51000000 - 0x51044000 c:\winnt\system32\ddraw.dll
0x728A0000 - 0x728A6000 c:\winnt\system32\DCIMAN32.dll
0x72D90000 - 0x72E03000 c:\winnt\system32\D3DIM.DLL
0x60000000 - 0x60045000 C:\WINNT\System32\MSCTF.dll
0x1C050000 - 0x1C125000 C:\WINNT\System32\nView.dll
0x70BD0000 - 0x70C35000 C:\WINNT\system32\SHLWAPI.dll
0x782F0000 - 0x78534000 C:\WINNT\system32\SHELL32.dll
0x71710000 - 0x71794000 C:\WINNT\system32\COMCTL32.dll
0x690A0000 - 0x690AB000 C:\WINNT\System32\PSAPI.DLL
0x766F0000 - 0x766F7000 C:\WINNT\System32\POWRPROF.dll
0x77820000 - 0x77827000 C:\WINNT\system32\VERSION.dll
0x759B0000 - 0x759B6000 C:\WINNT\system32\LZ32.DLL
0x695E0000 - 0x69609000 C:\WINNT\System32\OLEPRO32.DLL
0x779B0000 - 0x77A4B000 C:\WINNT\system32\OLEAUT32.dll
0x1CB00000 - 0x1CB0B000 C:\Program Files\Lotus\Sametime Client\ACTIVMON.dll
0x61220000 - 0x61232000 C:\Program Files\Microsoft
Hardware\Mouse\MSH_ZWF.dll
0x77920000 - 0x77943000 C:\WINNT\system32\imagehlp.dll
0x72A00000 - 0x72A2D000 C:\WINNT\system32\DBGHELP.dll


Local Time = Thu Feb 06 10:33:12 2003
Elapsed Time = 3


#
# HotSpot Virtual Machine Error : EXCEPTION_ACCESS_VIOLATION
# Error ID : 4F530E43505002E6
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi

#
# Java VM: Java HotSpot(TM) Client VM (1.4.1_01-b01 mixed mode)

#


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.*;
import javax.swing.*;

public class P1 extends JFrame {
    public P1() {
        getContentPane().add(new T1(1200,600));
        setSize(1200,600);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


    }
    
    public static void main(String[] args) {
        (new P1()).show();


    }

   
}




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

public class T1 extends JPanel {

    public T1(int w,int h) {


    }

  
    public void paintComponent(Graphics g) {

        super.paintComponent(g);
       
        Graphics2D g2 = (Graphics2D)g;
        g2.drawPolyline(null,null,256);

    }


}


(Review ID: 180948)
======================================================================

Name: rmT116609 Date: 02/25/2003


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile and run the test case.


EXPECTED VERSUS ACTUAL BEHAVIOR :
expected: exception
actual : jvm crash

ERROR MESSAGES/STACK TRACES THAT OCCUR :

Unexpected Signal : EXCEPTION_ACCESS_VIOLATION occurred at PC=0x6D3A68E7
Function=[Unknown.]
Library=C:\Programme\Java\j2re1.4.1_01\bin\client\jvm.dll

NOTE: We are unable to locate the function name symbol for the error
      just occurred. Please refer to release documentation for possible
      reason and solutions.


Current Java thread:
at sun.awt.windows.Win32Renderer.doDrawPoly(Native Method)
at sun.awt.windows.Win32Renderer.drawPolyline(Win32Renderer.java:114)
at sun.java2d.pipe.ValidatePipe.drawPolyline(ValidatePipe.java:95)
at sun.java2d.SunGraphics2D.drawPolyline(SunGraphics2D.java:2061)
at PolyLineCrash.main(PolyLineCrash.java:21)

Dynamic libraries:
0x00400000 - 0x00406000 C:\WINDOWS\system32\java.exe
0x77F40000 - 0x77FEE000 C:\WINDOWS\System32\ntdll.dll
0x77E40000 - 0x77F38000 C:\WINDOWS\system32\kernel32.dll
0x77DA0000 - 0x77E3C000 C:\WINDOWS\system32\ADVAPI32.dll
0x78000000 - 0x78086000 C:\WINDOWS\system32\RPCRT4.dll
0x77BE0000 - 0x77C33000 C:\WINDOWS\system32\MSVCRT.dll
0x6D330000 - 0x6D45A000 C:\Programme\Java\j2re1.4.1_01
\bin\client\jvm.dll
0x77D10000 - 0x77D9C000 C:\WINDOWS\system32\USER32.dll
0x77C40000 - 0x77C80000 C:\WINDOWS\system32\GDI32.dll
0x76AF0000 - 0x76B1D000 C:\WINDOWS\system32\WINMM.dll
0x76330000 - 0x7634C000 C:\WINDOWS\System32\IMM32.DLL
0x6D1D0000 - 0x6D1D7000 C:\Programme\Java\j2re1.4.1_01\bin\hpi.dll
0x6D300000 - 0x6D30D000 C:\Programme\Java\j2re1.4.1_01\bin\verify.dll
0x6D210000 - 0x6D229000 C:\Programme\Java\j2re1.4.1_01\bin\java.dll
0x6D320000 - 0x6D32D000 C:\Programme\Java\j2re1.4.1_01\bin\zip.dll
0x6D000000 - 0x6D0FB000 C:\Programme\Java\j2re1.4.1_01\bin\awt.dll
0x72F70000 - 0x72F93000 C:\WINDOWS\system32\WINSPOOL.DRV
0x77180000 - 0x772A1000 C:\WINDOWS\system32\ole32.dll
0x6D180000 - 0x6D1D0000 C:\Programme\Java\j2re1.4.1_01
\bin\fontmanager.dll
0x736D0000 - 0x73714000 C:\WINDOWS\system32\ddraw.dll
0x73B30000 - 0x73B36000 C:\WINDOWS\system32\DCIMAN32.dll
0x6DE00000 - 0x6DE71000 C:\WINDOWS\system32\D3DIM.DLL
0x0EE70000 - 0x0EE9B000 C:\WINDOWS\System32\msctfime.ime
0x76C50000 - 0x76C72000 C:\WINDOWS\system32\imagehlp.dll
0x6DA00000 - 0x6DA7D000 C:\WINDOWS\system32\DBGHELP.dll
0x77BD0000 - 0x77BD7000 C:\WINDOWS\system32\VERSION.dll
0x76BB0000 - 0x76BBB000 C:\WINDOWS\system32\PSAPI.DLL

Local Time = Mon Feb 17 20:31:14 2003
Elapsed Time = 0
#
# HotSpot Virtual Machine Error : EXCEPTION_ACCESS_VIOLATION
# Error ID : 4F530E43505002E6
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi
#
# Java VM: Java HotSpot(TM) Client VM (1.4.1_01-b01 mixed mode)
#


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.applet.Applet;
import java.awt.*;
/**
 * Describe class <code>PolylineCrashApplet</code> here.
 *
 * @author <a href="mailto:###@###.###"></a>
 * @version 1.0
 */
public class PolyLineCrash extends Applet {
    static int[] a,b;
    public void paint(Graphics g)
    {
g.drawPolyline(a,b,30);
g.drawString("Crash the browser!", 20, 90);
    }
  
  public static void main(String[] args) {
   Frame f = new Frame();
   f.show();
   Graphics g = f.getGraphics();
   g.drawPolyline(a,b,30);
// (new PolyLineCrash()).paint(g);
  }
  
}

---------- END SOURCE ----------


(Review ID: 181414)
======================================================================


Name: jk109818 Date: 01/30/2003


FULL PRODUCT VERSION :
java version "1.4.0_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0_01-b03)
Java HotSpot(TM) Client VM (build 1.4.0_01-b03, mixed mode)

FULL OPERATING SYSTEM VERSION :
Microsoft Windows 2000 [Version 5.00.2195]

ADDITIONAL OPERATING SYSTEMS : (only 2. Problem)
Windows 2000
Windows XP

A DESCRIPTION OF THE PROBLEM :
1. Problem:
if you use
g.drawPolyLine(x, y, 100);
and x and y are not initialized, you get the the
errormassage below..
I made the mistake in line 185

2. Problem:
the system crashes!




STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1.Problem:
description under "Description"

2.Problem:
remove line 185 compile the program, start it, enter a big
value in the a4 textfield (i.e. 10 000 000)!

the error also occurs when the program is implemented as
applet.
i uploaded it to http://www.diablo2web.de


EXPECTED VERSUS ACTUAL BEHAVIOR :
1.Problem
i expectet a nullPointerException

2.I expected no system-crash

ERROR MESSAGES/STACK TRACES THAT OCCUR :
X:\PI3>java Funktion

Unexpected Signal : EXCEPTION_ACCESS_VIOLATION occurred at PC=0x6D365C59
Function=[Unknown.]
Library=C:\Java\j2sdk1.4.0_01\jre\bin\client\jvm.dll

NOTE: We are unable to locate the function name symbol for the error
      just occurred. Please refer to release documentation for possible
      reason and solutions.


Current Java thread:
        at sun.awt.windows.Win32Renderer.doDrawPoly(Native Method)
        at sun.awt.windows.Win32Renderer.drawPolyline(Win32Renderer.java:114)
        at sun.java2d.SunGraphics2D.drawPolyline(SunGraphics2D.java:2041)
        at GraphView.paintComponent(Funktion.java:185)
        at javax.swing.JComponent.paint(JComponent.java:804)
        at javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4735)

        at javax.swing.JComponent.paintDoubleBuffered(JComponent.java:4688)
        at javax.swing.JComponent._paintImmediately(JComponent.java:4632)
        at javax.swing.JComponent.paintImmediately(JComponent.java:4464)
        at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:404)

        at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(System
EventQueueUtilities.java:117)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:443)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:191)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:144)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:130)

        at java.awt.EventDispatchThread.run(EventDispatchThread.java:98)

Dynamic libraries:
0x00400000 - 0x00406000 C:\Java\j2sdk1.4.0_01\bin\java.exe
0x77880000 - 0x77901000 C:\WINNT\System32\ntdll.dll
0x77DA0000 - 0x77DFD000 C:\WINNT\system32\ADVAPI32.dll
0x77E70000 - 0x77F33000 C:\WINNT\system32\KERNEL32.DLL
0x77D20000 - 0x77D91000 C:\WINNT\system32\RPCRT4.DLL
0x78000000 - 0x78046000 C:\WINNT\system32\MSVCRT.dll
0x6D330000 - 0x6D445000 C:\Java\j2sdk1.4.0_01\jre\bin\client\jvm.dll
0x77E00000 - 0x77E5F000 C:\WINNT\system32\USER32.dll
0x77F40000 - 0x77F79000 C:\WINNT\system32\GDI32.dll
0x77540000 - 0x77571000 C:\WINNT\System32\WINMM.dll
0x6D1D0000 - 0x6D1D7000 C:\Java\j2sdk1.4.0_01\jre\bin\hpi.dll
0x6D300000 - 0x6D30D000 C:\Java\j2sdk1.4.0_01\jre\bin\verify.dll
0x6D210000 - 0x6D228000 C:\Java\j2sdk1.4.0_01\jre\bin\java.dll
0x6D320000 - 0x6D32D000 C:\Java\j2sdk1.4.0_01\jre\bin\zip.dll
0x6D000000 - 0x6D0F6000 C:\Java\j2sdk1.4.0_01\jre\bin\awt.dll
0x777F0000 - 0x7780E000 C:\WINNT\System32\WINSPOOL.DRV
0x782F0000 - 0x78300000 C:\WINNT\system32\MPR.DLL
0x75DF0000 - 0x75E0A000 C:\WINNT\System32\IMM32.dll
0x77A40000 - 0x77B35000 C:\WINNT\system32\ole32.dll
0x6D180000 - 0x6D1D0000 C:\Java\j2sdk1.4.0_01\jre\bin\fontmanager.dll
0x51000000 - 0x51044000 C:\WINNT\System32\DDRAW.dll
0x72810000 - 0x72816000 C:\WINNT\System32\DCIMAN32.dll
0x69000000 - 0x6910A000 C:\WINNT\System32\ATIO2KAD.dll
0x6E330000 - 0x6E336000 C:\WINNT\System32\INDICDLL.dll
0x77910000 - 0x77933000 C:\WINNT\system32\imagehlp.dll
0x72970000 - 0x7299D000 C:\WINNT\system32\DBGHELP.dll
0x68F30000 - 0x68F3B000 C:\WINNT\System32\PSAPI.DLL

Local Time = Tue Nov 26 15:18:01 2002
Elapsed Time = 5
#
# HotSpot Virtual Machine Error : EXCEPTION_ACCESS_VIOLATION
# Error ID : 4F530E43505002D5
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi
#
# Java VM: Java HotSpot(TM) Client VM (1.4.0_01-b03 mixed mode)
#
# An error report file has been saved as hs_err_pid1044.log.
# Please refer to the file for further information.
#

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

class Model
{
private Vector listeners = new Vector();
private double[] faktoren = {0.0, 0.0, 0.0, 0.0, 0.0};
private int zoom = 1, x = 0;

public void setX(int x)
{
this.x = x;
fireModelChanged();
}

public int getX()
{
return x;
}

public int getZoom()
{
return zoom;
}

public void setZoom(int zoom)
{
this.zoom = zoom;
fireModelChanged();
}

public void setFaktor(int index, double faktor)
{
faktoren[index] = faktor;
fireModelChanged();
}

public double getFaktor(int index)
{
return faktoren[index];
}

public double[] getFaktoren()
{
return faktoren;
}

public int length()
{
return faktoren.length;
}

public void addListener(ModelListener mdl)
{
listeners.addElement(mdl);
}

public void fireModelChanged()
{
for (int i = 0; i < listeners.size(); i++)
{
ModelListener mdl = (ModelListener) listeners.elementAt
(i);
mdl.modelChanged(this);
}
}
}

interface ModelListener
{
public void modelChanged(Model mdl);
}

class TextFeldView extends JPanel implements ModelListener
{
private Model mdl;
private int index;
JTextField tf;

public TextFeldView(Model mdl, int index)
{
this.mdl = mdl;
this.index = index;
mdl.addListener(this);
JLabel jl = new JLabel("a" + index);
tf = new JTextField("" + mdl.getFaktor(index));
tf.addActionListener(new TextFeldController(mdl, index));
setLayout(new BorderLayout());
add(jl, BorderLayout.WEST);
add(tf, BorderLayout.CENTER);

}

public void modelChanged(Model mdl)
{
tf.setText("" + mdl.getFaktor(index));
}
}

class SliderView extends JPanel implements ModelListener
{
private Model mdl;
private int index;
private JSlider js = new JSlider(-10, 10);

public SliderView(Model mdl, int index)
{
this.mdl = mdl;
this.index = index;
mdl.addListener(this);
js.setMajorTickSpacing(2);
js.setPaintTicks(true);
js.setPaintLabels(true);
JLabel jl = new JLabel("a" + index);
add(jl, BorderLayout.WEST);
add(js, BorderLayout.CENTER);
js.addChangeListener(new SliderController(mdl, index));
}

public void modelChanged(Model mdl)
{
js.setValue((int) mdl.getFaktor(index));
}
}

class FormulaView extends JLabel implements ModelListener
{
private Model mdl;
private String text, anfang = " f(x) = ";

public FormulaView(Model mdl)
{
this.mdl = mdl;
mdl.addListener(this);
setHorizontalAlignment(RIGHT);
setForeground(Color.RED);
setText(formel() + " ");
}

private String formel()
{
text = anfang;
for (int i = mdl.length() - 1; i > 0; i--)
if (mdl.getFaktor(i) != 0)
text += mdl.getFaktor(i) + "x^" + i + " + ";
if (mdl.getFaktor(0) != 0)
text += mdl.getFaktor(0);
else
text = text.substring(0, text.length() - 3);
return text;
}

public void modelChanged(Model mdl)
{
setText(formel() + " ");
}
}

class GraphView extends JPanel implements ModelListener
{
private Model mdl;
private double[] y, x;
private int[] xc, yc, xt, yt;
private double[] faktoren;

public GraphView(Model mdl)
{
super();
this.mdl = mdl;
mdl.addListener(this);
faktoren = new double[mdl.length()];
}

public void paintComponent(Graphics g)
{
super.paintComponent(g);
setSize(((getHeight() > getWidth()) ? getWidth() : getHeight
()) / 20 * 20, ((getHeight() > getWidth()) ? getWidth() : getHeight()) / 20 *
20);
compute();

//Tangente
g.setColor(Color.RED);
g.fillArc(mdl.getX(), getHeight() / 2 - 3, 6, 6, 0, 360);
g.drawPolyline(xt, yt, getHeight() - 20); //THIS LINE CAUSES
THE HotSpot Virtual Machine Error
g.setColor(Color.BLACK);

//Koordinatensystem
g.drawLine(10, getHeight() / 2, getWidth() - 10, getHeight() /
2);
g.drawLine(getWidth() /2 , 10, getWidth() / 2, getHeight() -
10);
for (int i = -10; i <= 10; i++)
{
g.drawLine(getWidth() / 2 - 3, getWidth() / 2 + i *
mdl.getZoom() * ((getWidth() - 20)) / 20, getWidth() / 2 + 3, getWidth() / 2 +
i * mdl.getZoom() * ((getWidth() - 20)) / 20);
g.drawLine(getWidth() / 2 + i * mdl.getZoom() *
((getWidth() - 20)) / 20, getWidth() / 2 - 3, getWidth() / 2 + i * mdl.getZoom
() * ((getWidth() - 20)) / 20, getWidth() / 2 + 3);
}

//Graph
g.drawPolyline(xc, yc, getHeight() - 20);
}

public void compute()
{
for (int i = 0; i < mdl.length(); i++)
{
faktoren[i] = -mdl.getFaktor(mdl.length() - 1 - i);

}
x = new double[getHeight() - 20];
y = new double[getHeight() - 20];
xc = new int[getHeight() - 20];
yc = new int[getHeight() - 20];
for (int i = -(getHeight() -20) /2; i < (getHeight() -20) /2;
i++)
{
x[i+(getHeight() - 20) / 2] = (double) i / ((getHeight
() - 20) / 20 * mdl.getZoom());
}
y = hornerschema(x, faktoren);
for (int i = 0; i < getHeight() - 20; i++)
{
yc[i] = (int) (y[i] * (getHeight() - 20) / 20 *
mdl.getZoom() + 10 + (getHeight() - 20) / 2);
xc[i] = (int) (x[i] * (getHeight() - 20) / 20 *
mdl.getZoom() + 10 + (getHeight() - 20) / 2);
}
yc[getHeight()-21] = yc[getHeight()-22];
xc[getHeight()-21] = xc[getHeight()-22];
}

public double[] hornerschema(double[] x, double[] faktoren)
{
double[] tmp = new double[x.length];
double[] tmp2 = new double[faktoren.length];
for (int i = 0; i < tmp.length; i++)
{
tmp2[0] = 0;
tmp2[1] = (faktoren[0] * x[i]);
for (int j = 2; j < faktoren.length; j++)
{
tmp2[j] = ((faktoren[j-1] + tmp2[j-1]) * x[i]);
}
tmp[i] = (tmp2[tmp2.length-1] + faktoren[tmp2.length-
1]);
}
return tmp;
}

public void modelChanged(Model mdl)
{
repaint();
}
}

class MouseMotionController implements MouseMotionListener
{
private Model mdl;

public MouseMotionController(Model mdl)
{
this.mdl = mdl;
}
public void mouseMoved(MouseEvent e)
{
mdl.setX(e.getX());
}

public void mouseDragged(MouseEvent e)
{
}
}

class TextFeldController implements ActionListener
{
private int index;
private Model mdl;

public TextFeldController(Model mdl, int index)
{
this.mdl = mdl;
this.index = index;
}

public void actionPerformed(ActionEvent evt)
{
JTextField tf = (JTextField) evt.getSource();
mdl.setFaktor(index, Double.parseDouble(tf.getText()));
}
}

class SliderController implements ChangeListener
{
private int index;
private Model mdl;

public SliderController(Model mdl, int index)
{
this.mdl = mdl;
this.index = index;
}

public void stateChanged(ChangeEvent evt)
{
JSlider js = (JSlider) evt.getSource();
mdl.setFaktor(index, js.getValue());
}
}

class ZoomController implements ChangeListener
{
private Model mdl;

public ZoomController(Model mdl)
{
this.mdl = mdl;
}

public void stateChanged(ChangeEvent evt)
{
JSlider js = (JSlider) evt.getSource();
mdl.setZoom(js.getValue());
}
}

public class Funktion extends ExitFrame
{
private Model mdl = new Model();

public Funktion()
{
super("Polynomdarstellung");

//Slider
Container slidercont = new Container();
slidercont.setLayout(new GridLayout(mdl.length(),1));
for (int i = 0; i < mdl.length(); i++)
{
SliderView sv = new SliderView(mdl,i);
slidercont.add(sv);
}
getContentPane().add(slidercont, BorderLayout.WEST);


//Textfelder
Container textfeldcont = new Container();
textfeldcont.setLayout(new GridLayout(1,mdl.length()));
for (int i = 0; i < mdl.length(); i++)
{
TextFeldView tfv = new TextFeldView(mdl,i);
textfeldcont.add(tfv);
}
getContentPane().add(textfeldcont, BorderLayout.SOUTH);

//Formel
FormulaView fv = new FormulaView(mdl);
getContentPane().add(fv, BorderLayout.NORTH);

//Graph anzeigen
GraphView gv = new GraphView(mdl);
gv.addMouseMotionListener(new MouseMotionController(mdl));
getContentPane().add(gv, BorderLayout.CENTER);

//Zoom
JSlider js = new JSlider(1, 10);
js.addChangeListener(new ZoomController(mdl));
js.setOrientation(1);
js.setValue(1);
getContentPane().add(js, BorderLayout.EAST);



setLocation(100,100);
setSize(810,610);
setVisible(true);
}

public static void main(String[] args)
{
new Funktion();
}
}

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

class ExitFrame extends JFrame implements WindowListener
{
static int zaehler = 0;

ExitFrame()
{
super();
zaehler++;
addWindowListener(this);
}

ExitFrame(String s)
{
super(s);
zaehler++;
addWindowListener(this);
}
public void windowClosing(WindowEvent evt)
{
zaehler--;
if (zaehler == 0)
System.exit(0);
}
public void windowActivated(WindowEvent evt) {}
public void windowClosed(WindowEvent evt) {}
public void windowDeactivated(WindowEvent evt) {}
public void windowDeiconified(WindowEvent evt) {}
public void windowIconified(WindowEvent evt) {}
public void windowOpened(WindowEvent evt) {}
}
---------- END SOURCE ----------

CUSTOMER WORKAROUND :
1. Problem: don't make the mistake to forget initializing
an array :)

2. Problem: don't have a work around
(Review ID: 178406)
======================================================================

Name: rmT116609 Date: 02/13/2003


DESCRIPTION OF THE PROBLEM :
Was due to the system call
g.drawPolyline(xp,yp,len) where 'yp' was null instead of an int[];
goes away when yp is properly initialized.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
run the source code below


ERROR MESSAGES/STACK TRACES THAT OCCUR :
Unexpected Signal : EXCEPTION_ACCESS_VIOLATION occurred at PC=0x6D3A68E7
Function=[Unknown.]
Library=C:\Program Files\Java\j2re1.4.1_01\bin\client\jvm.dll

NOTE: We are unable to locate the function name symbol for the error
 just occurred. Please refer to release documentation for possible
 reason and solutions.

Current Java thread:


at sun.awt.windows.Win32Renderer.doDrawPoly(Native Method)


at sun.awt.windows.Win32Renderer.drawPolyline(Win32Renderer.java:114)


at sun.java2d.SunGraphics2D.drawPolyline(SunGraphics2D.