question: public static double max ( final double a , final double b ) { if ( a > b ) { return a ; } if ( a < b ) { return b ; } if ( a != b ) { return Double . NaN ; } long bits = Double . doubleToRawLongBits ( a ) ; if ( bits == 0x8000000000000000L ) { return b ; } return a ; }
target:  Compute the maximum of two values