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/ftp/FTPCommand.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.ftp;

/**
 * FTPCommand stores a set of constants for FTP command codes.  To interpret
 * the meaning of the codes, familiarity with RFC 959 is assumed.
 * The mnemonic constant names are transcriptions from the code descriptions
 * of RFC 959.  For those who think in terms of the actual FTP commands,
 * a set of constants such as {@link #USER  USER } are provided
 * where the constant name is the same as the FTP command.
 *
 * @deprecated use {@link FTPCmd} instead
 */
@Deprecated
public final class FTPCommand
{

    public static final int USER = 0;
    public static final int PASS = 1;
    public static final int ACCT = 2;
    public static final int CWD = 3;
    public static final int CDUP = 4;
    public static final int SMNT = 5;
    public static final int REIN = 6;
    public static final int QUIT = 7;
    public static final int PORT = 8;
    public static final int PASV = 9;
    public static final int TYPE = 10;
    public static final int STRU = 11;
    public static final int MODE = 12;
    public static final int RETR = 13;
    public static final int STOR = 14;
    public static final int STOU = 15;
    public static final int APPE = 16;
    public static final int ALLO = 17;
    public static final int REST = 18;
    public static final int RNFR = 19;
    public static final int RNTO = 20;
    public static final int ABOR = 21;
    public static final int DELE = 22;
    public static final int RMD = 23;
    public static final int MKD = 24;
    public static final int PWD = 25;
    public static final int LIST = 26;
    public static final int NLST = 27;
    public static final int SITE = 28;
    public static final int SYST = 29;
    public static final int STAT = 30;
    public static final int HELP = 31;
    public static final int NOOP = 32;
    /** @since 2.0 */
    public static final int MDTM = 33;
    /** @since 2.2 */
    public static final int FEAT = 34;
    /** @since 2.2 */
    public static final int MFMT = 35;
    /** @since 2.2 */
    public static final int EPSV = 36;
    /** @since 2.2 */
    public static final int EPRT = 37;

    /**
     *  Machine parseable list for a directory
     * @since 3.0
     */
    public static final int MLSD = 38;

    /**
     * Machine parseable list for a single file
     * @since 3.0
     */
    public static final int MLST = 39;

    // Must agree with final entry above; used to check array size
    private static final int LAST = MLST;

    public static final int USERNAME = USER;
    public static final int PASSWORD = PASS;
    public static final int ACCOUNT = ACCT;
    public static final int CHANGE_WORKING_DIRECTORY = CWD;
    public static final int CHANGE_TO_PARENT_DIRECTORY = CDUP;
    public static final int STRUCTURE_MOUNT = SMNT;
    public static final int REINITIALIZE = REIN;
    public static final int LOGOUT = QUIT;
    public static final int DATA_PORT = PORT;
    public static final int PASSIVE = PASV;
    public static final int REPRESENTATION_TYPE = TYPE;
    public static final int FILE_STRUCTURE = STRU;
    public static final int TRANSFER_MODE = MODE;
    public static final int RETRIEVE = RETR;
    public static final int STORE = STOR;
    public static final int STORE_UNIQUE = STOU;
    public static final int APPEND = APPE;
    public static final int ALLOCATE = ALLO;
    public static final int RESTART = REST;
    public static final int RENAME_FROM = RNFR;
    public static final int RENAME_TO = RNTO;
    public static final int ABORT = ABOR;
    public static final int DELETE = DELE;
    public static final int REMOVE_DIRECTORY = RMD;
    public static final int MAKE_DIRECTORY = MKD;
    public static final int PRINT_WORKING_DIRECTORY = PWD;
    //  public static final int LIST = LIST;
    public static final int NAME_LIST = NLST;
    public static final int SITE_PARAMETERS = SITE;
    public static final int SYSTEM = SYST;
    public static final int STATUS = STAT;
    //public static final int HELP = HELP;
    //public static final int NOOP = NOOP;

    /** @since 2.0 */
    public static final int MOD_TIME = MDTM;

    /** @since 2.2 */
    public static final int FEATURES = FEAT;
    /** @since 2.2 */
    public static final int GET_MOD_TIME = MDTM;
    /** @since 2.2 */
    public static final int SET_MOD_TIME = MFMT;

    // Cannot be instantiated
    private FTPCommand()
    {}

    private static final String[] _commands = {
                                          "USER", "PASS", "ACCT", "CWD", "CDUP", "SMNT", "REIN", "QUIT", "PORT",
                                          "PASV", "TYPE", "STRU", "MODE", "RETR", "STOR", "STOU", "APPE", "ALLO",
                                          "REST", "RNFR", "RNTO", "ABOR", "DELE", "RMD", "MKD", "PWD", "LIST",
                                          "NLST", "SITE", "SYST", "STAT", "HELP", "NOOP", "MDTM", "FEAT", "MFMT",
                                          "EPSV", "EPRT", "MLSD", "MLST" };



    // default access needed for Unit test
    static void checkArray(){
        final int expectedLength = LAST+1;
        if (_commands.length != expectedLength) {
            throw new RuntimeException("Incorrect _commands array. Should have length "
                    +expectedLength+" found "+_commands.length);
        }
    }

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

⏎ org/apache/commons/net/ftp/FTPCommand.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
Download 

⇒ Download and Install commons-net.jar Binary Package

⇐ What Is commons-net.jar

⇑ Downloading and Reviewing commons-net.jar

⇑⇑ FAQ for Apache commons-net.jar