Question

How to get the bits of a float value in Java

Answer 1

import java.nio.ByteBuffer;

public class Program {
    public static void main(String[] args) {
        float value = 3.14f;
        byte[] bytes = ByteBuffer.allocate(4).putFloat(value).array();

        StringBuilder binaryString = new StringBuilder("0b");
        
        for (byte b : bytes) {
            binaryString.append(String.format("%8s", Integer.toBinaryString(b & 0xFF)).replace(' ', '0')).append("_");
        }
        
        binaryString.deleteCharAt(binaryString.length() - 1);

        System.out.println(binaryString.toString());
    }
}

// https://www.h-schmidt.net/FloatConverter/IEEE754.html



/*
run:

0b01000000_01001000_11110101_11000011

*/

 

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