Java Scanner nextBigInteger() Method

The nextBigInteger() of Java Scanner class method is used to scan the next token of the input as a BigInteger. There is two different types of Java nextBigInteger() method which can be differentiated depending on its parameter. These are:

Java Scanner nextBigInteger() Method
Java Scanner nextBigInteger(int radix) Method

nextBigInteger() Method

This is a Java Scanner class method which is used to scan the next token of the input as a BigInteger in the default radix.

nextBigInteger(int radix) Method

This is an inbuilt method of Java Scanner class which is used to scan the next token of the input as a BigInteger in the specified radix.

Syntax

Following is the declaration of nextBigInteger() method:

public BigInteger nextBigInteger()
public BigInteger nextBigInteger(int radix)

Parameter

DataType	Parameter	Description	Required/Optional
int	radix	It is used to interpret the token as a BigInteger value.	Required

Returns

The nextBigInteger() method returns the BigInteger value scanned from the input.

Exceptions

IllegalStateException- This method throws exception if the innvocation is done after the scanner has been closed.

IllegalArgumentException- It throws this exception if the specified radix is out of range.

InputMismatchException- It throws this exception if the next token does not match the Integer regular expression, or is out of range.

Compatibility Version

Java 1.5 and above

Example 1

import java.math.BigInteger;
import java.util.*;
public class ScannerNextBigIntegerExample1 {  
    public static void main(String args[]){  
    	  System.out.print("Enter BigInteger Number to check prime: ");;
    	  Scanner in = new Scanner(System.in);
        BigInteger n = in.nextBigInteger();
        in.close();
        System.out.println(n.isProbablePrime(1) ? "prime" : "not prime");
	  }  
}

Output:

Enter BigInteger Number to check prime: 37427347
prime

Example 2

import java.math.BigInteger;
import java.util.*;
public class ScannerNextBigIntegerExample2 {  
    public static void main(String args[]){  
    	  Scanner sc = new Scanner(System.in);
    	  System.out.print("Enter Value of a: ");
        BigInteger a = sc.nextBigInteger();
        System.out.print("Enter Value of b: ");
        BigInteger b = sc.nextBigInteger();
        BigInteger ans = a.multiply(b);
        System.out.println("Result: "+ans.toString());
        sc.close();
	  }  
}

Output:

Enter Value of a: 123456
Enter Value of b: 123456
Result: 15241383936

Example 3

import java.util.*;
public class ScannerNextBigIntegerExample3 {  
    public static void main(String args[]){ 
    	   //Initialize the scanner
    	   Scanner scan = new Scanner("55454 JavaTpoint 1 + 1 = 2.0  False -7987AB");
    	   while (scan.hasNext()) {
            //If the next is BigInteger, print "Found" and the Integer
            if (scan.hasNextBigInteger()) {
               System.out.println("Found: " + scan.nextBigInteger());
            }
            //If BigInteger is not found, print "Not Found" and the tokens
            System.out.println("Not Found: " + scan.next());
         }
         scan.close();
	   }  
}

Output:

Found: 55454
Not Found: JavaTpoint
Found: 1
Not Found: +
Found: 1
Not Found: =
Not Found: 2.0
Not Found: False
Not Found: -7987AB

Example 4

import java.util.*;
public class ScannerNextBigIntegerExample4 {  
    public static void main(String args[]){ 
    	   String s = "55 Hello World! 3 + 3.0 = 6 ";    
    	   //Initialize 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("Output: " + scanner.nextBigInteger(16));  
    	   scanner.close();
	   }  
}

Output:

Output: 85

Example 5

import java.util.*;
public class ScannerNextBigIntegerExample5 {  
    public static void main(String args[]){ 
    	    String str = " Java 46 55 33 true";
 	    Scanner scanner = new Scanner(str);
 	    while (scanner.hasNext()) {
 	       System.out.println("Not Found : " + scanner.next());
 	       if (scanner.hasNextBigInteger()) {
 	          System.out.println("Found : " + scanner.nextBigInteger(81));
 	       }
 	    }
 	    scanner.close();
	    }  
}

Output:

Not Found : Java
Exception in thread "main" java.lang.IllegalArgumentException: radix:81
	at java.base/java.util.Scanner.setRadix(Scanner.java:1368)
	at java.base/java.util.Scanner.nextBigInteger(Scanner.java:2673)
	at myPackage.ScannerNextBigIntegerExample5.main(ScannerNextBigIntegerExample5.java:11)

Next TopicJava Scanner Class

← prev next →

Help Others, Please Share

Javatpoint Services

JavaTpoint offers too many high quality services. Mail us on [email protected], to get more information about given services.

Website Designing
Website Development
Java Development
PHP Development
WordPress
Graphic Designing
Logo
Digital Marketing
On Page and Off Page SEO
PPC
Content Development
Corporate Training
Classroom and Online Training
Data Entry

Training For College Campus

JavaTpoint offers college campus training on Core Java, Advance Java, .Net, Android, Hadoop, PHP, Web Technology and Python. Please mail your requirement at [email protected].
Duration: 1 week to 2 week

^{Like/Subscribe us for latest updates or newsletter}