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Java Scanner toString() Method with Example

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

Scanner Class toString() method

  • toString() method is available in java.util package.
  • toString() method is used to string denotation of this Scanner and it contains information related to tracing.
  • toString() 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.
  • toString() method does not throw an exception at the time of string denotation of this Scanner.

Syntax:

    public String toString();

Parameter(s):

  • It does not accept any parameter.

Return value:

The return type of the method is String, it returns string representation of this Scanner.

Example:

// Java program to demonstrate the example 
// of String toString() method of Scanner 

import java.util.*;

public class ToStringOfScanner {
    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 toString() method is to
        // represent string for this Scanner
        System.out.println("sc.toString(): " + sc.toString());

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

Output

sc.nextLine(): Hi, true 
sc.toString(): java.util.Scanner[delimiters=\p{javaWhitespace}+][position=10][match valid=true][need input=false][source closed=false][skipped=false][group separator=\,][decimal separator=\.][positive prefix=][negative prefix=\Q-\E][positive suffix=][negative suffix=][NaN string=\QNaN\E][infinity string=\Q∞\E]





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