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/JsonpCharacterEscapes.java

package com.fasterxml.jackson.core;

import com.fasterxml.jackson.core.io.CharacterEscapes;
import com.fasterxml.jackson.core.io.SerializedString;

/**
 * Convenience {@link CharacterEscapes} implementation that escapes
 * Unicode characters `0x2028` and `0x2029` (in addition to characters
 * escaped otherwise), which are apparently considered linefeeds as
 * per newer Javascript specifications, and consequently problematic
 * when using JSONP (see https://en.wikipedia.org/wiki/JSONP).
 *
 * @since 2.8
 */
public class JsonpCharacterEscapes extends CharacterEscapes
{
    private static final long serialVersionUID = 1L;

    private static final int[] asciiEscapes = CharacterEscapes.standardAsciiEscapesForJSON();
    private static final SerializedString escapeFor2028 = new SerializedString("\\u2028");
    private static final SerializedString escapeFor2029 = new SerializedString("\\u2029");

    private static final JsonpCharacterEscapes sInstance = new JsonpCharacterEscapes();

    public static JsonpCharacterEscapes instance() {
        return sInstance;
    }

    @Override
    public SerializableString getEscapeSequence(int ch)
    {
        switch (ch) {
        case 0x2028:
            return escapeFor2028;
        case 0x2029:
            return escapeFor2029;
        default:
            return null;
        }
    }

    @Override
    public int[] getEscapeCodesForAscii() {
        return asciiEscapes;
    }
}

⏎ com/fasterxml/jackson/core/JsonpCharacterEscapes.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