Can someone please help me write this program, its java in netbean, Im stuck!!

Assignment:

Code the Rock Paper Scissors program:

Get a move choice from playerA which must be R, P, S or r, p, s Exit with System.exit(0) and an error msg if the user fails to respond correctly

Get a move choice from playerB in the same manner Again, Exit with System.exit(0) and an error msg if the user fails to respond correctly

Display the results using the accepted phrases from the game Rock breaks Scissors, Paper covers Rock, Scissors cuts Paper and indicate the winner (Player A wins) or Rock vs Rock its a Tie! Etc