how is java differs from c

Answer 1

c or c++, there's a HUGE difference between java and c, but with c++ less so, biggest are pointers and multiple inheritance in c++, universal usability and thread support out the gate, interpreted language, and completely OOP for java

Answer 2

most certain answer to your question is:
c= close to hardware
good for writing drivers
mostly machine level coding practice.
c++ = middle level language
have best of both worlds, object oriented as well as speed of machine level language.
mostly application and control flow development practice.
java = high level language
more options for developers of high end development.
initially became famous for its security features.

Depending upon your requirement, all three have their pros and cons. There is nothing like 1 language can do and other can not. It is more like, What language can do My Desired Work More Efficiently and Effectively.