ADDITIONAL JAVA TOPICS - Java Programming: From Problem Analysis to Program Design - page 992

Method
winning
Object

To decide the winner of the game, you look at the players' selections and then at the
rules of the game. For example, if one player chooses ROCK and another chooses
PAPER , the player who chose PAPER wins. In other words, the winning object is
PAPER . The method winningObject , given two objects, decides and returns the
winning object. Clearly, this method has two parameters of the type
RockPaperScissors , and the value returned by this method is also of the type
RockPaperScissors . The definition of this method is:

public static RockPaperScissors winningObject
(RockPaperScissors play1,
RockPaperScissors play2)

{

if ((play1 == RockPaperScissors.ROCK &&
play2 == RockPaperScissors.SCISSORS)
|| (play2 == RockPaperScissors.ROCK &&
play1 == RockPaperScissors.SCISSORS))
return RockPaperScissors.ROCK;
else if ((play1 == RockPaperScissors.ROCK &&
play2 == RockPaperScissors.PAPER)
|| (play2 == RockPaperScissors.ROCK &&
play1 == RockPaperScissors.PAPER))
return RockPaperScissors.PAPER;
else
return RockPaperScissors.SCISSORS;

}

After the game is over, this method outputs the final results—that is, the total number
of plays and the number of plays won by each player. The total number of plays is
stored in the variable gameCount , the number of plays by player 1 is stored in the
variable winCount1 , and the number of plays won by player 2 is stored in the
variable winCount2 . This method has three parameters corresponding to these three
variables. Essentially, the definition of this method is as follows:

Method
display
Results

public static void displayResults( int gCount, int wCount1,
int wCount2)

{

System.out.println("The total number of plays: "
+ gCount);
System.out.println("The number of plays won by "
+ "player 1: " + wCount1);
System.out.println("The number of plays won by "
+ "player 2: " + wCount2);

}

We are now ready to write the algorithm for the method main .