question: protected void flip ( BufferCapabilities . FlipContents flipAction ) { if ( peer != null ) { Image backBuffer = getBackBuffer ( ) ; if ( backBuffer != null ) { peer . flip ( 0 , 0 , backBuffer . getWidth ( null ) , backBuffer . getHeight ( null ) , flipAction ) ; } } else { throw new IllegalStateException ( "Component must have a valid peer" ) ; } }
target:  Flipping moves the contents of the back buffer to the front buffer, either by copying or by moving the video pointer.