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public class Infoboard {

	static float doubleValue(float f) {
		int n = Float.floatToIntBits(f);
		n += 1 << 22;
		return Float.intBitsToFloat(n);
	}

	public static void main(String[] args) {
		float f = 0.3f;
		System.out.println(doubleValue(doubleValue(f)));
	}
}

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static float doubleValue(float f) {
	int n = Float.floatToIntBits(f);
	int exponent = (n >> 22) & 0xff;
	n ^= exponent << 22;
	exponent++;
	n |= exponent << 22;
	return Float.intBitsToFloat(n);
}

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public class Infoboard {
	static void PrintBinary(int n, int pad, String meaning) {
		System.out.println();
		if (meaning != "")
			System.out.print(meaning + ": ");
		String bits = Integer.toBinaryString(n);
		while (bits.length() < pad)
			bits = "0" + bits;
		System.out.println(bits);
	}

	static float doubleValue(float f) {
		int n = Float.floatToIntBits(f);
		PrintBinary(n, 32, "");
		System.out.println("VEEEEEEEEMMMMMMMMMMMMMMMMMMMMMMM");
		//Vorzeichen, Exponent (8 Bits), Mantisse (23 Bits)

		int exponent = (n >> 23) & 0xff;
		PrintBinary(exponent, 8, "Exponent");

		//Exponent auf 0 setzen
		n ^= exponent << 23;
		PrintBinary(n, 32, "");
		System.out.println("VEEEEEEEEMMMMMMMMMMMMMMMMMMMMMMM");

		exponent++;
		n |= exponent << 23;
		PrintBinary(n, 32, "");
		System.out.println("VEEEEEEEEMMMMMMMMMMMMMMMMMMMMMMM");

		return Float.intBitsToFloat(n);
	}

	public static void main(String[] args) {
		float f = 10;
		System.out.println(f + " --> " + doubleValue(f));
	}
}