Java Scanner remove() Method

The remove() method of Java Scanner class is used when remove operation is not supported by this implementation of Iterator.

Syntax

Following is the declaration of remove() method:

Parameter

This method does not accept any parameter.

Returns

The remove() method does not return any value.

Exceptions

UnsupportedOperationException- It will thrown exception if this method is invoked.

Compatibility Version

Java 1.5 and above

Example 1

import java.util.Scanner;  
public class ScannerRemoveExample1{	
    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());
          //Call remove to get results     
          scanner.remove();     
          scanner.close();
          }  
}   

Output:

Hi All! This is JavaTpoint.
Exception in thread "main" java.lang.UnsupportedOperationException
	at java.base/java.util.Scanner.remove(Scanner.java:1490)
	at myPackage.ScannerRemoveExample1.main(ScannerRemoveExample1.java:10)

Example 2

import java.util.Scanner;  
public class ScannerRemoveExample2 {  
   public static void main(String args[]){ 
	 System.out.print("Enter Your Name: ");
       //Create a scanner with the specified Object
       Scanner scan = new Scanner(System.in);    
       String name = scan.next();
       System.out.println("Name: "+name); 
       System.out.println("Exception Found. ");
       //Remove method call results in an exception
       scan.remove();
       scan.close();
   }  
} 

Output:

Enter Your Name: Java
Name: Java
Exception Found. 
Exception in thread "main" java.lang.UnsupportedOperationException
	at java.base/java.util.Scanner.remove(Scanner.java:1490)
	at myPackage.ScannerRemoveExample2.main(ScannerRemoveExample2.java:12)

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