Null Pointer exception in fullscreen using active rendering

Question

When I create a window use it in fullscreen with active rendering, then close fullscreen, dispose the window and create an identical window wich I use in fullscreen again with active rendering I get a Null pointer exception. The exception happens in the active rendering loop of the second window. Why does this happen and how do I solve it?
/Thankfull for any answer
THE CODE
FILE "Main.java"
import java.awt.*;
class Main
public static void main(String[] args)
GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd=ge.getDefaultScreenDevice();
DisplayMode[] dm=gd.getDisplayModes();
int theDisplayMode=0;
for(int i=0;i<dm.length;i++)
if(dm.getWidth()==1024 && dm.getHeight()==768 && dm.getRefreshRate()==75)
theDisplayMode=i;
TheWindow jw=new TheWindow();
gd.setFullScreenWindow(jw);
gd.setDisplayMode(dm[theDisplayMode]);
jw.activePaint();
gd.setFullScreenWindow(null);
jw.dispose();
System.out.println("First window closed");
jw=new TheWindow();
gd.setFullScreenWindow(jw);
gd.setDisplayMode(dm[theDisplayMode]);
jw.activePaint();
gd.setFullScreenWindow(null);
jw.dispose();
System.out.println("Second window closed");
FILE "TheWindow.java"
import java.awt.*;
import java.awt.image.*;
import javax.swing.*;
class TheWindow extends JWindow
private BufferStrategy theStrategy;
private boolean finished=false;
private Graphics2D g2;
public TheWindow()
public void activePaint()
int i=0;
setIgnoreRepaint(true);
createBufferStrategy(2);
theStrategy=getBufferStrategy();
while(i++<200)
g2=(Graphics2D)theStrategy.getDrawGraphics();
g2.dispose();
theStrategy.show();

Answer 1

Hi,
Please try to pass lookupEvent, LookupCodeColumn values as HashMap object. Try out the following.
com.sun.java.util.collections.HashMap vMyParams = new HashMap();
vMyParams.put("lookupEvent","update");
vMyParams.put("lookupEvent",LookupCode);
pageContext.setForwardURL("OA.jsp?
page=/eis/oracle/apps/xxeis/central/admin/Lookups/webui /EISRSCLookupsCreatePG",
null,
OAWebBeanConstants.KEEP_MENU_CONTEXT,
null,
vMyParams , //*Here pass your HashMap object.*
false,
OAWebBeanConstants.ADD_BREAD_CRUMB_YES,
OAWebBeanConstants.IGNORE_MESSAGES);
No need to change the code in other CO as you can still continue with PageContext.getParameter("lookupEvent") etc..
HTH,
Syed.