Floating-point hexadecimal in Java

In this article, we use the '%a' format specifier to represent floating-point numbers in their hexadecimal form. This is useful when you need precise control over the representation of floating-point values.

For Formatter, import the following package ?

import java.util.Formatter; 

Now creating a 'Formatter'object to format the data?

Formatter f = new Formatter();

Using the format() method with the %a format specifier to convert a floating-point number to its hexadecimal string.?

f.format("%a", 298.45)

Example 1: Basic Example

In this example, we format the floating-point number '298.45' to its hexadecimal representation using the '%a' format specifier with a 'Formatter' object ?

import java.util.Formatter; public class Main{ public static void main(String args[]) { Formatter f = new Formatter(); // Floating-point hexadecimal form System.out.println(f.format("%a", 298.45)); } } 

Output

The above program displays the following output ?

0x1.2a73333333333p8 

Example 2: Multiple Floating-Point Numbers

Following is an another example to format the multiple floating-point numbers to their hexadecimal string representations.

We iterate through an array of floating-point numbers, converting each to its hexadecimal representation using the '%a' format specifier with a 'Formatter' object ?

import java.util.Formatter; public class Main { public static void main(String[] args) { double[] numbers = {123.456, -45.67, 0.125}; for (double number : numbers) { Formatter f = new Formatter(); f.format("%a", number); System.out.println(f.toString()); } } } 

Output

Following is the output of the above program ?

0x1.edd2f1a9fbe77p6 -0x1.6d5c28f5c28f6p5 0x1.0p-3