Keybinds and such

private boolean keyStates[];
public Minecraft mc;

public className(Minecraft par1Minecraft)
{
        keyStates = new boolean [256];
        this.mc = par1Minecraft;
}

    public boolean checkKey(int i)
    {
        if(mc.currentScreen != null)
        {
            return false;
        }
        if(Keyboard.isKeyDown(i) != keyStates[i])
        {
            return keyStates[i] = !keyStates[i];
        } else
        {
            return false;
        }
    }

                if(checkKey(Keyboard.KEY_H))
{
   boolean = !boolean;
}