I am a bca completed student from mg university.I have learnt c,c++,cobol,java,vb,vb.net. Haven't got any job and I am thinking to work next year onwards.so could you suggest me which programming language is good to get a nice salary and for good future?

You need experience in your programming field.
Just because you have done the university courses doesn't mean you can jump right into a well paid job.
Experience counts for much more than paper qualifications.

But I didn't get degree certificate yet.. I have to clear some papers.so I am waiting for it.in between I could do some programming course.