@Override
    public float readFloat() throws IOException {
        checkIfPackedField();
        return Float.intBitsToFloat(readRawLittleEndian32());
    }
Read a {@code float} field value from the internal buffer.
jraft-rheakv/rheakv-core/src/main/java/com/alipay/sofa/jraft/rhea/serialization/impl/protostuff/io/NioBufInput.java