CODEWITHSUNDEEP
javaconsole
a3dsfcv
a3dsfcv

Reputation: 1274

Recreating Scanner in Java

I'm writing a game in java, and I have a method that asks user to input the value from Console:

public String getUserInput() {
    try (Scanner scan = new Scanner(System.in)) {
        String s = scan.nextLine();
        return s;
    }
}

The thing is I want to invoke this method various number of times depends on external parameters and I never know in advance, will I invoke again or not.

But when I invoke methods like this for the second call - I get 

Exception in thread "main" java.util.NoSuchElementException: No line found

Problems:

Upvotes: 0

Views: 152

Answers (1)

Kayaman
Kayaman

Reputation: 73528

Don't reopen or recreate it. Use one Scanner for the duration of your program.

Closing a Scanner (as in this case, with your try-with-resources block) will close its input, in this case System.in. You don't want to close that, since you can't reopen it.

Upvotes: 5

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