Java Scanner close() Method

The close() is a method of Java Scanner class which is used to closes this scanner.

Syntax

Following is the declaration of close() method:

Parameter

This method does not accept any parameter.

Returns

The close() method does not return any value.

Exceptions

Compatibility Version

Java 1.5 and above

Example 1

import java.util.Scanner;  
public class ScannerCloseExample1{  
   public static void main(String args[]){  
	String s = "Hi All! This is JavaTpoint.";
      //Create a scanner with the specified Object
      Scanner scanner = new Scanner(s);
      System.out.println("" + scanner.nextLine());
      //Close the scanner
      System.out.println("Closing Scanner...");
      scanner.close();
      System.out.println("Scanner Closed.");
   }  
}   

Output:

Hi All! This is JavaTpoint.
Closing Scanner...
Scanner Closed.

Example 2

import java.util.Scanner;  
public class ScannerCloseExample2{  
   public static void main(String args[]){ 
	 System.out.print("Enter Your Name: ");
       //Create a scanner with the specified Object
       Scanner scanner = new Scanner(System.in);    
       String name = scanner.next();
       System.out.println("Name: "+name); 
       //Close the scanner
       scanner.close();
       System.out.println("Scanner Closed.");
   }  
}   

Output:

Enter Your Name: JavaTpoint
Name: JavaTpoint
Scanner Closed.

Example 3

import java.util.Scanner;  
public class ScannerCloseExample3 {  
     public static void main(String args[]){ 
    	   System.out.println("Throws Exception If Number is of Type Long.");
	   Scanner scanner = new Scanner(System.in);      
	   System.out.print("Enter your rollno: ");  
	   int rollno = scanner.nextInt();  
         System.out.println("RollNumber: "+rollno); 
         //Close the scanner
         scanner.close();
         System.out.println("Scanner Closed.");       
     }  
}   

Output:

Throws Exception If Number is of Type Long.
Enter your rollno: 345643985649356
Exception in thread "main" java.util.InputMismatchException: For input string: "345643985649356"
	at java.base/java.util.Scanner.nextInt(Scanner.java:2264)
	at java.base/java.util.Scanner.nextInt(Scanner.java:2212)
	at myPackage.ScannerCloseExample3.main(ScannerCloseExample3.java:9)

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