I'm trying to create a rock, paper, scissors, lizard, spock program that repeats itself until the user chooses to exit. However, I can't figure out quite how to make the program loop. It keeps exiting after one game. I think it might have to do with how my while statement is set up, But I'm not entirely sure what to do to fix it. Thanks.
import java.util.Scanner;
import java.util.Random;
public class project2_rpsls {
public static void main(String[] args)
{
int round=0;
String uMove = null, cMove = null/*, loop*/;
Scanner scan=new Scanner(System.in);
/*System.out.println("Would you like to play?");
loop=scan.next();
loop=loop.toUpperCase();
while (loop.equals("Y"))*/
while (round>=0)
{
round++;
}
//get the moves
{
uMove = getuMove();
cMove = getcMove();
}
//Determining the winner
{
String winner;
if (cMove.equals(uMove))
{
winner="It was a tie!";
}
else if (uMove.equals("ROCK") && cMove.equals("LIZARD") ||
uMove.equals ("ROCK") && cMove.equals("SCISSORS"))
{
winner="You Win!";
}
else if (uMove.equals("PAPER") && cMove.equals("ROCK") ||
uMove.equals ("PAPER") && cMove.equals("SPOCK"))
{
winner="You Win!";
}
else if (uMove.equals("SCISSORS") && cMove.equals("PAPER") ||
uMove.equals ("SCISSORS") && cMove.equals("LIZARD"))
{
winner="You Win!";
}
else if (uMove.equals("LIZARD") && cMove.equals("SPOCK") ||
uMove.equals ("LIZARD") && cMove.equals("PAPER"))
{
winner="You Win!";
}
else if (uMove.equals("SPOCK") && cMove.equals("SCISSORS") ||
uMove.equals ("SPOCK") && cMove.equals("ROCK"))
{
winner="You Win!";
}
else
{
winner="You Lose!";
}
System.out.println("The computer picked " + cMove + " -- " + winner);
}
scan.close();
}
//Get user's move
private static String getuMove()
{
Scanner scan=new Scanner(System.in);
String uMove="test";
while (!uMove.equals("ROCK") &&
!uMove.equals ("PAPER")&&
!uMove.equals("SCISSORS")&&
!uMove.equals("LIZARD")&&
!uMove.equals("SPOCK"))
{
System.out.println("Please enter your move: ");
uMove=scan.next();
uMove=uMove.toUpperCase();
}
scan.close();
return uMove;
}
//Get computer's move
private static String getcMove() {
String cMove;
Random cMoveInt = new Random();
int rnum;
rnum=cMoveInt.nextInt(5);
{
if (rnum == 1) {
cMove = "ROCK";
}
else if (rnum == 2) {
cMove = "PAPER";
}
else if (rnum == 3){
cMove = "SCISSORS";
}
else if (rnum == 4){
cMove = "LIZARD";
}
else {
cMove = "SPOCK";
}
}
return cMove;
}
}
Thanks for the pointers. After I changed my while loop to
while (round>=0)
{
round++;
//get the moves
uMove = getuMove();
cMove = getcMove();
//Determining the winner
{
String winner;
...etc.
I got the following error.
Exception in thread "main" java.util.NoSuchElementException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at project2_rpsls.getuMove(project2_rpsls.java:82)
at project2_rpsls.main(project2_rpsls.java:22)
From my research, it seems as though my scanner isn't finding anything to read, but I don't see how, because it's supposed to be reading user input.
Your
while (round >= 0)
{
round++;
}
...does nothing but increment the round
variable until it wraps around back to zero (after roughly 4 billion loops). Then the rest of your code runs. Move the rest of the code into the loop.
For example:
while (round >= 0)
{
round++;
uMove = getuMove();
cMove = getcMove();
String winner;
// ...etc.
}
Also note that the following braces are redundant:
{
uMove = getuMove();
cMove = getcMove();
}
This can be written as:
uMove = getuMove();
cMove = getcMove();
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