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Java Scanner hasNextBigDecimal() Method

The java Scanner hasNextBigDecimal() method returns true if the next token in this scanner's input can be interpreted as a BigDecimal using the nextBigDecimal() method. The scanner does not advance past any input.

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

public boolean hasNextBigDecimal()

NA

This method returns true if and only if this scanner's next token is a valid BigDecimal

IllegalStateException − if this scanner is closed

The following example shows the usage of Java Scanner hasNextBigDecimal() method to check if next token is a BigDecimal. We've created a scanner object using a given string. Then we checked each token to be BigDecimal and printed. In the end scanner is closed using close() method.

package com.tutorialspoint;

import java.util.Scanner;

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

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

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

      while (scanner.hasNext()) {
         
         // check if the scanner's next token is a BigDecimal
         if(scanner.hasNextBigDecimal()){
            // print what is scanned
            System.out.println(scanner.next());		 
         } else {
            scanner.next();
         }
      }

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

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

3
3.0
6

The following example shows the usage of Java Scanner hasNextBigDecimal() method to check if next token is a BigDecimal. We've created a scanner object using System.in class. Then we checked each token to be BigDecimal and printed. In the end scanner is closed using close() method.

package com.tutorialspoint;

import java.util.Scanner;

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

      // create a new scanner with System Input
      Scanner scanner = new Scanner(System.in);
         
      // check if the scanner's next token is a BigDecimal
      if(scanner.hasNextBigDecimal()){
         // print what is scanned
         System.out.println(scanner.next());		 
      } else {
         scanner.next();
      }

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

Let us compile and run the above program, this will produce the following result − (where we've entered 3.0.)

3.0
3.0

The following example shows the usage of Java Scanner hasNextBigDecimal() method to check if next token is a BigDecimal. We've created a scanner object using a file properties.txt. Then we checked each token to be BigDecimal and printed. In the end scanner is closed using close() method.

package com.tutorialspoint;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

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

      // create a new scanner with a file as input
      Scanner scanner = new Scanner(new File("properties.txt"));
         
      while (scanner.hasNext()) {
         
         // check if the scanner's next token is a BigDecimal
         if(scanner.hasNextBigDecimal()){
            // print what is scanned
            System.out.println(scanner.next());		 
         } else {
            scanner.next();
         }
      }

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

Assuming we have a file properties.txt available in your CLASSPATH, with the following content. This file will be used as an input for our example program −

Hello World! 3 3.0 6

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

3
3.0
6

java_util_scanner.htm

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