question: @ Deprecated public static float [ ] combine ( float [ ] x , float [ ] y ) { int len = 0 ; if ( x != null ) len += x . length ; if ( y != null ) len += y . length ; float [ ] z = null ; if ( len > 0 ) { z = new float [ len ] ; int currentPos = 0 ; if ( x != null ) { System . arraycopy ( x , 0 , z , currentPos , x . length ) ; currentPos = x . length ; } if ( y != null ) System . arraycopy ( y , 0 , z , currentPos , y . length ) ; } return z ; }
target:  Returns the vector [x y]