You have fallspeed as a double, yet getY will always be an int. You will need to track the vertical position of the actor using a double field and use it instead of getY.
Also, you have yet to include any gravity values into the movement so that is slows down going up and then starts to come back down. Finally, its vertical decent will need to be stopped when at ground level or when landing on a platform.
Actually, you are setting deltaX to -fallspeed using "=-" where you should be adjusting its value with "+=". Also, when jumping, you need to set deltaX to jumpHeight using "= -".
2018/6/19
2018/6/19
2018/6/19
2018/6/19
2018/6/19
2018/6/20
2018/7/2