Java.util.Scanner.nextBigInteger() Method



The java.util.Scanner.nextBigInteger(int radix) method scans the next token of the input as a BigInteger. If the next token matches the Integer regular expression defined above then the token is converted into a BigInteger value as if by removing all group separators, mapping non-ASCII digits into ASCII digits via the Character.digit, and passing the resulting string to the BigInteger(String, int) constructor with the specified radix.


Following is the declaration for java.util.Scanner.nextBigInteger() method

public BigInteger nextBigInteger(int radix)


radix − the radix used to interpret the token

Return Value

This method returns the BigInteger scanned from the input


  • InputMismatchException − if the next token does not match the Integer regular expression, or is out of range

  • NoSuchElementException − if the input is exhausted

  • IllegalStateException − if this scanner is closed


The following example shows the usage of java.util.Scanner.nextBigInteger() method.

package com.tutorialspoint;

import java.util.*;

public class ScannerDemo {
   public static void main(String[] args) {

      String s = "23 Hello World! 3 + 3.0 = 6 ";

      // create a new scanner with the specified String Object
      Scanner scanner = new Scanner(s);

      // scan next token as a Big Integer with radix 4
      System.out.println("" + scanner.nextBigInteger(4));

      // close the scanner

Let us compile and run the above program, this will produce the following result −