Q: Why do we need to use shift operator in Java? Can you give some examples?

Answer: Using shift operators in Java we can:

• 1. Make faster integer division/multiplication operations:
  
  4839534 * 4
  can be done like this:
  4839534 << 2
  
  or
  
  543894 / 2
  can be done like this:
  543894 >> 1
  
  Shift operations much more faster than multiplication for most of processors.
  
• 2. Reassembling byte streams to int values
• 3. For accelerating operations with graphics since Red, Green and Blue colors coded by separate bytes.
• 4. Packing small numbers into one single long...