BigDecimal floatValue() Method in Java with Examples

Last Updated : 27 May, 2019

The java.math.BigDecimal.floatValue() converts this BigDecimal to a float. If this BigDecimal has too great magnitude to represent as a float, it will be converted to Float.NEGATIVE_INFINITY or Float.POSITIVE_INFINITY as appropriate. Note that even when the return value is finite, this conversion can lose information about the precision of the BigDecimal value. Syntax:

public float floatValue()

Parameters: This function accepts no parameter. Returns: The method returns a float value which represents float value for this BigDecimal. Examples:

Input: BigDecimal1 = 1234
Output: 1234.0

Input: BigDecimal1 = 21545135451354545
Output: 2.15451365E16
Explanation: 
BigInteger1.floatValue() = 2.15451365E16. 
This BigDecimal is too big 
for a magnitude to represent as a float 
then it will be converted to 
Float.NEGATIVE_INFINITY or 
Float.POSITIVE_INFINITY as appropriate.

Below programs illustrate floatValue() method of BigDecimal class: Example 1:

Java

// Java program to demonstrate
// floatValue() method of BigDecimal

import java.math.BigDecimal;

public class GFG {
    public static void main(String[] args)
    {
        // For user input
        // Use Scanner or BufferedReader

        // Object of String created
        // Holds the value
        String input1
            = "545456468445645468464645";

        // Convert the string input to BigDecimal
        BigDecimal a
            = new BigDecimal(input1);

        // Using floatValue() method
        float f = a.floatValue();

        // Display the result
        System.out.println(f);
    }
}

Output:

5.4545646E23

Example 2:

Java

// Java program to demonstrate
// floatValue() method of BigDecimal

import java.math.BigDecimal;

public class GFG {
    public static void main(String[] args)
    {
        // For user input
        // Use Scanner or BufferedReader

        // Object of String created
        // Holds the value
        String input1
            = "984522";

        // Convert the string input to BigDecimal
        BigDecimal a
            = new BigDecimal(input1);

        // Using floatValue() method
        float f = a.floatValue();

        // Display the result
        System.out.println(f);
    }
}