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.
Syntax:
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            scanner.close();              System.out.println("\nScanner Closed.\n");              System.out.println("Trying to use scanner"                               + " after closing.");              // print the next line of the string            System.out.println(scanner.nextLine());        }          catch (Exception e) {            System.out.println("Exception thrown:\n" + e);        }    }} |
Output:
Scanner: Geeksforgeeks has Scanner Class Methods Scanner Closed. Trying to use scanner after closing. Exception thrown: java.lang.IllegalStateException: Scanner closed
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html#close()
