Name: ___________________________________________________________________

Objective: Passing objects to methods

Instructions:

1. Open your Solar System Lab
2. Import the files from Lab 20 Solar System VIII. You will be importing two files: a new applet file and a class called Blackhole.
3. Be sure your Spacecrafts have methods that can return their current location.
4. Modify the Blackhole class as follows:
1. Black holes are hollow white circles created in the center of the canvas. Every black hole should be the same size.
2. Black holes can report if a location is contained within itself.
3. Black holes have a methof called pull, which takes one Spacecraft object. The pull method moves the spacecraft half-way towards the black hole.
5. Modify the applet as follows:
1. Create two different spacecraft objects. Start their animation,.
2. If the user clicks within the black hole, pull the two spacecraft towards it.

Grading

 Notes