睡眠期间如何关闭扫描仪？

Question

import java.util.Scanner;
import java.util.concurrent.TimeUnit;
public class Lab1 {

    public static void main(String args[]) 
    throws InterruptedException {
        System.out.println("Please enter your first name.");
        String name;
        Scanner sc = new Scanner(System.in);
        name = sc.nextLine();
        System.out.println(name);
        Thread.sleep(1200); 
    } 
}

Because the scanner is still open, users can type during the pause. It doesn't crash the program, but I still want to be able to close the scanner and be able to reopen it later on in the code.

Answer 1

As of Java 7, Scanner implements AutoCloseable , so you can use try-with-resources to close it automatically:

String name;
try (Scanner in = new Scanner(System.in)) {
    name = in.nextLine();
}
System.out.println(name);