Scanner close() method in Java with Examples
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 = "w3wiki 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: w3wiki 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()
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