How to rotate a texture?

Question

Java

Here I have a planet, how to make it rotate? (All in 2D)
According to the tutorials, I tried this:

batch.draw(image,rect.x,rect.y,rect.width/2,rect.height/2,rect.width,rect.height,1,1,angle,1, 1, 1, 1, false,false);

And the image just doesn't show up, why?