ADDITIONAL JAVA TOPICS - Java Programming: From Problem Analysis to Program Design - page 990

public static boolean validSelection( char selection)
{

switch (selection)
{
case 'R':
case 'r':
case 'P':
case 'p':
case 'S':
case 's':
return true ;

default :
return false ;

}

}

This method uses the entered choice ( R , r , P , p , S ,or s ) and returns the appropriate
object. The method has one parameter of the type char . It is a value-returning
method and returns a reference to a RockPaperScissors object.
The definition of the method retrievePlay is:

Method
retrieve
Play

public static RockPaperScissors retrievePlay
( char selection)

{

RockPaperScissors obj = RockPaperScissors.ROCK;

switch (selection)
{
case 'R':
case 'r':
obj = RockPaperScissors.ROCK;
break ;

case 'P':
case 'p':
obj = RockPaperScissors.PAPER;
break ;

case 'S':
case 's':
obj = RockPaperScissors.SCISSORS;

}

return obj;

}