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Scanner close() method in Java with Examples

  • Difficulty Level : Basic
  • Last Updated : 10 Oct, 2018

The close() method ofjava.util.Scanner class closes the scanner which has been opened. If the scanner is already closed then on calling this method, it will have no effect.


public void close()

Return Value: The function does not return any value.

Below programs illustrate the above function:

Program 1:

// Java program to illustrate the
// close() method of Scanner class in Java
import java.util.*;
public class GFG1 {
    public static void main(String[] argv)
        throws Exception
        try {
            // Get the string
            String s = "Geeksforgeeks has Scanner Class Methods";
            // create a new scanner
            // with the specified String Object
            Scanner scanner = new Scanner(s);
            // print the next line of the string
            System.out.println("Scanner: "
                               + scanner.nextLine());
            // close the scanner
            System.out.println("\nScanner Closed.\n");
            System.out.println("Trying to use scanner"
                               + " after closing.");
            // print the next line of the string
        catch (Exception e) {
            System.out.println("Exception thrown:\n" + e);
Scanner: Geeksforgeeks has Scanner Class Methods

Scanner Closed.

Trying to use scanner after closing.
Exception thrown:
java.lang.IllegalStateException: Scanner closed


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