I am making a simple console game where player is allowed to move in
x ,-x, y,-y directions according to String input collected from keyboard as a, d, w and s respectively ,
but scanner is throwing NoSuchElementException, I tried collecting data with nextInt() too ,but I was getting similar exception.
Note: But scanner works for one time i.e. first time.
My Code
private static void gamePlay(boolean isPlaying) {
while (isPlaying) {
System.out.println("Choose a, d , s or w for movement:");
Scanner sc = new Scanner(System.in);
String choice = sc.next();
sc.close();
// code for movement of player according to a or s or d or w
switch (choice) {
case "a":
// Some code here
// move -x
break;
case "d":
// Some code here
// move +x
break;
case "w":
// Some code here
// move +y
break;
case "s":
// Some code here
// move -y
break;
case "q":
//quit
isPlaying = false;
break;
default:
break;
}
}
}
** Output**
Choose a, d , s or w for movement:
a
Choose a, d , s or w for movement:
Exception in thread "main" java.util.NoSuchElementException
at java.base/java.util.Scanner.throwFor(Scanner.java:937)
at java.base/java.util.Scanner.next(Scanner.java:1478)
at App.gamePlay(App.java:37)
at App.main(App.java:17)
private static void gamePlay(boolean isPlaying) {
while (isPlaying) {
System.out.println("Choose a, d , s or w for movement:");
Scanner sc = new Scanner(System.in);
String choice = sc.next();
// code for movement of player according to a or s or d or w
switch (choice) {
case "a":
// Some code here
// move -x
break;
case "d":
// Some code here
// move +x
break;
case "w":
// Some code here
// move +y
break;
case "s":
// Some code here
// move -y
break;
case "q":
//quit
sc.close();
isPlaying = false;
break;
default:
break;
}
}
}