How to convert hex string to float in Java?

floating-point, hex, java, string

Solution

public class Test {
  public static void main (String[] args) {

        String myString = "BF800000";
        Long i = Long.parseLong(myString, 16);
        Float f = Float.intBitsToFloat(i.intValue());
        System.out.println(f);
        System.out.println(Integer.toHexString(Float.floatToIntBits(f)));
  }
}

Problem

How to convert hexadecimal string to single precision floating point in Java? For example, how to implement: float f = HexStringToFloat("BF800000"); // f should now contain -1.0 I ask this because I have tried: ``` float f = (float)(-1.0); String s = String.format("%08x", Float.floatToRawIntBits(f)); f = Float.intBitsToFloat(Integer.valueOf(s,16).intValue()); ``` But I get the following exception: java.lang.NumberFormatException: For input string: "bf800000"

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