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Java Scanner remove() Method with Example

Scanner Class remove() method: Here, we are going to learn about the remove() method of Scanner Class with its syntax and example.
Submitted by Preeti Jain, on February 18, 2020

Scanner Class remove() method

• remove() method is available in java.util package.
• remove() method is used to result an exception during the call remove() method.
• remove() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• remove() method may throw an exception at the time of throwing an exception.
  UnsupportedOperationException: This exception may throw when this method is unsupported.

Syntax:

    public void remove();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is void, it returns nothing.

Example:

// Java program to demonstrate the example 
// of void remove() method of Scanner 

import java.util.*;

public class RemoveOfScanner {
    public static void main(String[] args) {
        String str = "Hi, true \n IncludeHelp! 8 + 2.0f = 10.0f";

        // Instantiate Scanner with the 
        //given str
        Scanner sc = new Scanner(str);

        //Display Scanner
        System.out.println("sc.nextLine(): " + sc.nextLine());

        // By using remove() method will
        // result an exception
        sc.remove();

        // close the scanner
        sc.close();
    }
}

Output

sc.nextLine(): Hi, true 

Exception in thread "main" java.lang.UnsupportedOperationException
	at java.base/java.util.Scanner.remove(Scanner.java:1490)
	at RemoveOfScanner.main(RemoveOfScanner.java:19)