Blue j programming

Im having abit of trouble trying to do 1C ive done a and b however I keep having trouble with 1C

User Requirements Set A
1. Car records:
a. add a new car
b. for a given registration number print the car’s details
c. print a list all cars that are for sale (i.e. where the price paid for is zero)

Can you post the code you are having problems with? Also post the program's output.
Be sure to wrap the code in code tags:
[code]
THE CODE HERE
[ /code]
Without a space.