Jackson is "the Java JSON library" or "the best JSON parser for Java". Or simply as "JSON for Java".

Jackson Core Source Code files are provided in the source packge (jackson-core-2.14.0-sources.jar). You can download it at Jackson Maven Website.

You can also browse Jackson Core Source Code below:

⏎ com/fasterxml/jackson/core/io/doubleparser/FloatBitsFromCharSequence.java

/**
 * References:
 * <dl>
 *     <dt>This class has been derived from "FastDoubleParser".</dt>
 *     <dd>Copyright (c) Werner Randelshofer. Apache 2.0 License.
 *         <a href="https://github.com/wrandelshofer/FastDoubleParser">github.com</a>.</dd>
 * </dl>
 */

package com.fasterxml.jackson.core.io.doubleparser;

/**
 * Parses a {@code float} from a {@link CharSequence}.
 */
class FloatBitsFromCharSequence extends AbstractFloatingPointBitsFromCharSequence {


    /**
     * Creates a new instance.
     */
    public FloatBitsFromCharSequence() {

    }

    @Override
    long nan() {
        return Float.floatToRawIntBits(Float.NaN);
    }

    @Override
    long negativeInfinity() {
        return Float.floatToRawIntBits(Float.NEGATIVE_INFINITY);
    }

    @Override
    long positiveInfinity() {
        return Float.floatToRawIntBits(Float.POSITIVE_INFINITY);
    }

    @Override
    long valueOfFloatLiteral(CharSequence str, int startIndex, int endIndex, boolean isNegative,
                             long significand, int exponent, boolean isSignificandTruncated,
                             int exponentOfTruncatedSignificand) {
        float d = FastFloatMath.decFloatLiteralToFloat(isNegative, significand, exponent, isSignificandTruncated, exponentOfTruncatedSignificand);
        return Float.floatToRawIntBits(Float.isNaN(d) ? Float.parseFloat(str.subSequence(startIndex, endIndex).toString()) : d);
    }

    @Override
    long valueOfHexLiteral(
            CharSequence str, int startIndex, int endIndex, boolean isNegative, long significand, int exponent,
            boolean isSignificandTruncated, int exponentOfTruncatedSignificand) {
        float d = FastFloatMath.hexFloatLiteralToFloat(isNegative, significand, exponent, isSignificandTruncated, exponentOfTruncatedSignificand);
        return Float.floatToRawIntBits(Float.isNaN(d) ? Float.parseFloat(str.subSequence(startIndex, endIndex).toString()) : d);
    }

}

⏎ com/fasterxml/jackson/core/io/doubleparser/FloatBitsFromCharSequence.java

Or download all of them as a single archive file:

File name: jackson-core-2.14.0-sources.jar
File size: 497693 bytes
Release date: 2022-11-05
Download 

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⇑⇑ Jackson - Java JSON library