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()
