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?

 

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);

Oh dear.

What do you want to say, darling?

 

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

Suggest alternatives if so.

For me it throws null exception.

You are just lucky...