[Solved]Taking sreenshots?

[Naiten]

Hi. I want to take a sreenshot via code. This is the code i found in Minecraft class.

private void screenshotListener()
    {
        if (Keyboard.isKeyDown(60))
        {
            if (!this.isTakingScreenshot)
            {
                this.isTakingScreenshot = true;
                this.ingameGUI.getChatGUI().printChatMessage(ScreenShotHelper.saveScreenshot(minecraftDir, 
                   this.displayWidth, this.displayHeight));
            }
        }
        else
        {
            this.isTakingScreenshot = false;
        }
    }

This is mine code

public boolean onItemUse(ItemStack item, EntityPlayer player, World world, int x, int y, int z, int side, float xOffset, float yOffset, float zOffSet)
{
   blablabla
   File phDir = mine.getAppDir("minecraft");
   mine.ingameGUI.getChatGUI().printChatMessage(ScreenShotHelper.saveScreenshot(phDir, 
      mine.displayWidth, mine.displayHeight));
   world.playSoundAtEntity(player, "random.bow", 0.5F, 0.4F / (itemRand.nextFloat() * 0.4F + 0.8F));
   blablabla
   return true;
}

And i'm getting an error

2013-05-05 14:48:35 [iNFO] [sTDERR] java.lang.NullPointerException
2013-05-05 14:48:35 [iNFO] [sTDERR] 	at org.lwjgl.opengl.GL11.glPixelStorei(GL11.java:2135)
2013-05-05 14:48:35 [iNFO] [sTDERR] 	at net.minecraft.util.ScreenShotHelper.func_74292_a(ScreenShotHelper.java:45)
2013-05-05 14:48:35 [iNFO] [sTDERR] 	at net.minecraft.util.ScreenShotHelper.saveScreenshot(ScreenShotHelper.java:28)
2013-05-05 14:48:35 [iNFO] [sTDERR] 	at net.obscuracraft.src.ItemPlate.onItemUse(ItemPlate.java:84)

Any ideas?

 

[Naiten]

Well, unlike some persons i don't make a secret of my code, so here's the solution.

robot = new Robot();
BufferedImage shot = robot.createScreenCapture(x, y, w, h);

[Naiten]

Oh dear.

What do you want to say, darling?

 

[Naiten]

Oh, but it actually works. Will tell the right way then?

[Naiten]

Suggest alternatives if so.

[Naiten]

For me it throws null exception.

[Naiten]

You are just lucky...