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()