java Problems :)

Iam a college student, but I feel shy because I did not have enuogh experience to solve eny problem in java.I finish course in C++ and really I dont like it, and now Iam studeing java course and I feel that java is better than C++ , but I still have problem.
My problem is that when I have question or problem that I have to solve it , I know the idea to solve that problems, but I can not implement my idea
I hope that any one can help me or suggest any way for me to solve this problem.
I try to talk with my teacher, but he did not have enuogh time for these question..
Thanks