cant take input from user

**new_1** · 12-24-2007, 07:55 PM

hi,
my application was successfully compiled, but when i tried to run it, kept running..
this happens at the step when im taking input from user.
i use a scanner object to take input from user.
i imported all java.util classes.
What could be the problem???
plz help ASAP.
thnx.

**hardwired** · 12-24-2007, 09:04 PM

Let's see what you did.

**new_1** · 12-24-2007, 09:19 PM

well, the code was long, but even the example below didnt work.

Java Code:

public class Main {
    public static void main(String[] args) 
    {
       Scanner input = new Scanner( System.in );
       int i=input.nextInt();
    }

}

and of course class java.util.Scanner is imported above.
ill appreciate immediate help.
thanks.

**hardwired** · 12-24-2007, 10:11 PM

Yes, using nextInt with the System.in will cause the jvm to move along after the first use (of something like nextInt) without blocking for user input. Try nextLine instead.

Java Code:

import java.util.*;

public class Test {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("enter an int");
        int n = Integer.parseInt(scanner.nextLine());
        System.out.println("you entered " + n);
        System.out.println("enter a String");
        String line = scanner.nextLine();
        System.out.println("you entered " + line);
    }
}

When you have trouble you can always throw a small test app together to explore things.