title: Is it possible to include two different java package and use their API?
body: <p>I just want to know if it is possible to use two different package of java in a single project. For example there are two or more java package for neural network. Is it possible for
  me to use those all packages for a single project? There is one package called stat which 
  includes many API for statistical operation.May I include those all in a project like incluing
  different header files in C programming and use those interchangeably?</p>
  
  <p>Any concise source of quickly java learning material would be very much beneficial.</p>