Java.util.Scanner.nextFloat() Method



The java.util.Scanner.nextFloat() 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.


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

public float nextFloat()


  • NA

Return Value

This method returns the float scanned from the input


  • InputMismatchException -- if the next token does not match the Float 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.nextFloat() method.

package com.tutorialspoint;

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

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

   // close the scanner

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

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