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Java basics

nextFloat()


This method scans the next token of the input as a float. This method will throw InputMismatchException if the next token cannot be translated into a valid float value as described below. If the translation is successful, the scanner advances past the input that matched.

Syntax:
Library: java.util.Scanner

public float nextFloat()


Example:

import java.util.*;

public class ScannerDemo {

   public static void main(String[] args) {

      String s = "Hello World! 3 + 3.0 = 6.0 true ";
      Float f = 1.2385f;
      s = s + f;

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

      // use US locale to be able to identify floats in the string
      scanner.useLocale(Locale.US);

      // find the next float token and print it
      // loop for the whole scanner
      while (scanner.hasNext()) {
         scanner.next();
         // if the next is a float, print found and the float
         if (scanner.hasNextFloat()) {
            System.out.println("Found :" + scanner.nextFloat());
         }
      }

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

Output

Found :3.0
Found :3.0
Found :6.0
Found :1.2385


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