SLF4J Bridge to JDK is a binding bridge that implements the SLF4J API with JDK logging library.

Here is the source code for SLF4J Bridge to JDK. You can download its pre-compiled version slf4j-jdk14-1.7.31.jar at SLF4J Download Website.

⏎ org/slf4j/impl/StaticMarkerBinder.java

/**
 * Copyright (c) 2004-2011 QOS.ch
 * All rights reserved.
 *
 * Permission is hereby granted, free  of charge, to any person obtaining
 * a  copy  of this  software  and  associated  documentation files  (the
 * "Software"), to  deal in  the Software without  restriction, including
 * without limitation  the rights to  use, copy, modify,  merge, publish,
 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 *
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 *
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
package org.slf4j.impl;

import org.slf4j.IMarkerFactory;
import org.slf4j.MarkerFactory;
import org.slf4j.helpers.BasicMarkerFactory;
import org.slf4j.spi.MarkerFactoryBinder;

/**
 * 
 * The binding of {@link MarkerFactory} class with an actual instance of 
 * {@link IMarkerFactory} is performed using information returned by this class. 
 * 
 * @author Ceki Gülcü
 */
public class StaticMarkerBinder implements MarkerFactoryBinder {

    /**
     * The unique instance of this class.
     */
    public static final StaticMarkerBinder SINGLETON = new StaticMarkerBinder();

    final IMarkerFactory markerFactory = new BasicMarkerFactory();

    private StaticMarkerBinder() {
    }

    /**
     * Return the singleton of this class.
     * 
     * @return the StaticMarkerBinder singleton
     * @since 1.7.14
     */
    public static StaticMarkerBinder getSingleton() {
        return SINGLETON;
    }

    /**
     * Currently this method always returns an instance of 
     * {@link BasicMarkerFactory}.
     */
    public IMarkerFactory getMarkerFactory() {
        return markerFactory;
    }

    /**
     * Currently, this method returns the class name of
     * {@link BasicMarkerFactory}.
     */
    public String getMarkerFactoryClassStr() {
        return BasicMarkerFactory.class.getName();
    }

}

⏎ org/slf4j/impl/StaticMarkerBinder.java

Or download all of them as a single archive file:

File name: slf4j-jdk14-1.7.31-sources.jar
File size: 11116 bytes
Release date: 2021-06-17
Download 

⇒ Source Code for SLF4J 1.7.31 Bridge to Log4J 1.3

⇐ Source Code for SLF4J 1.7.31 Simple Logging

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⇑⇑ SLF4J - Simple Logging Facade for Java