commons-net.jar is the bytecode of Apache Commons Net library, which implements the client side of many basic Internet protocols.

Apache Commons Net Source Code files are provided in the binary packge (commons-net-3.8.0-bin.zip). You can download it at Apache Commons Net Website.

The source code of commons-net-3.8.0.jar is provided below:

⏎ org/apache/commons/net/nntp/NNTPCommand.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.net.nntp;

/**
 * NNTPCommand stores a set of constants for NNTP command codes.  To interpret
 * the meaning of the codes, familiarity with RFC 977 is assumed.
 */

public final class NNTPCommand
{

    public static final int ARTICLE   = 0;
    public static final int BODY      = 1;
    public static final int GROUP     = 2;
    public static final int HEAD      = 3;
    public static final int HELP      = 4;
    public static final int IHAVE     = 5;
    public static final int LAST      = 6;
    public static final int LIST      = 7;
    public static final int NEWGROUPS = 8;
    public static final int NEWNEWS   = 9;
    public static final int NEXT      = 10;
    public static final int POST      = 11;
    public static final int QUIT      = 12;
    public static final int SLAVE     = 13;
    public static final int STAT      = 14;
    public static final int AUTHINFO  = 15;
    public static final int XOVER     = 16;
    public static final int XHDR      = 17;

    // Cannot be instantiated
    private NNTPCommand()
    {}

    private static final String[] commands = {
        "ARTICLE", "BODY", "GROUP", "HEAD", "HELP", "IHAVE", "LAST", "LIST",
        "NEWGROUPS", "NEWNEWS", "NEXT", "POST", "QUIT", "SLAVE", "STAT",
        "AUTHINFO", "XOVER", "XHDR"
    };


    /**
     * Retrieve the NNTP protocol command string corresponding to a specified
     * command code.
     * <p>
     * @param command The command code.
     * @return The NNTP protcol command string corresponding to a specified
     *         command code.
     */
    public static String getCommand(final int command)
    {
        return commands[command];
    }

}

⏎ org/apache/commons/net/nntp/NNTPCommand.java

Or download all of them as a single archive file:

File name: commons-net-3.8.0-sources.jar
File size: 437325 bytes
Release date: 2020-01-22
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