How to get started with Moka7 on Raspbian?

[MWe]

I downloaded moka7-full-1.0.2.zip from https://sourceforge.net/projects/snap7/files/Moka7/1.0.2/ and unzipped it on my raspbian into my /opt directory.

root@rpi:/opt/moka7-full-1.0.2/Moka7-Eclipse/bin/Moka7Demo# java ClientDemo
Error: Could not find or load main class ClientDemo
root@rpi:/opt/moka7-full-1.0.2/Moka7-Eclipse/bin/Moka7Demo#

When I try to compile it myself I'm getting:

root@rpi:/opt/moka7-full-1.0.2/Moka7-Eclipse/src/Moka7Demo# javac -cp /opt/moka7-full-1.0.2/Moka7-Eclipse/bin/Moka7/ ClientDemo.java
ClientDemo.java:28: error: package Moka7 does not exist
import Moka7.*;
^
ClientDemo.java:41: error: cannot find symbol
    private static final S7Client Client = new S7Client();
                         ^
  symbol:   class S7Client
  location: class ClientDemo
ClientDemo.java:41: error: cannot find symbol
    private static final S7Client Client = new S7Client();
                                               ^
  symbol:   class S7Client
  location: class ClientDemo
ClientDemo.java:49: error: cannot find symbol
    private static int CurrentStatus = S7.S7CpuStatusUnknown;
                                       ^
  symbol:   variable S7
  location: class ClientDemo
ClientDemo.java:72: error: cannot find symbol
                System.out.println(S7.GetPrintableStringAt(Buffer, i-15, 16));
                                   ^
  symbol:   variable S7
  location: class ClientDemo
ClientDemo.java:83: error: cannot find symbol
            System.out.println(S7.GetPrintableStringAt(Buffer, Size-r, r));
                               ^
  symbol:   variable S7
  location: class ClientDemo
ClientDemo.java:112: error: cannot find symbol
        System.out.println(S7Client.ErrorText(Code));
                           ^
  symbol:   variable S7Client
  location: class ClientDemo
ClientDemo.java:117: error: cannot find symbol
        S7BlockInfo Block = new S7BlockInfo();
        ^
  symbol:   class S7BlockInfo
  location: class ClientDemo
ClientDemo.java:117: error: cannot find symbol
        S7BlockInfo Block = new S7BlockInfo();
                                ^
  symbol:   class S7BlockInfo
  location: class ClientDemo
ClientDemo.java:144: error: cannot find symbol
        IntByRef SizeRead = new IntByRef(0);
        ^
  symbol:   class IntByRef
  location: class ClientDemo
ClientDemo.java:144: error: cannot find symbol
        IntByRef SizeRead = new IntByRef(0);
                                ^
  symbol:   class IntByRef
  location: class ClientDemo
ClientDemo.java:161: error: cannot find symbol
        int Result = Client.ReadArea(S7.S7AreaDB, DBSample, 0, DataToMove, Buffer);
                                     ^
  symbol:   variable S7
  location: class ClientDemo
ClientDemo.java:172: error: cannot find symbol
        int Result = Client.WriteArea(S7.S7AreaDB, DBSample, 0, DataToMove, Buffer);
                                      ^
  symbol:   variable S7
  location: class ClientDemo
ClientDemo.java:204: error: cannot find symbol
        IntByRef PlcStatus = new IntByRef(S7.S7CpuStatusUnknown);
        ^
  symbol:   class IntByRef
  location: class ClientDemo
ClientDemo.java:204: error: cannot find symbol
        IntByRef PlcStatus = new IntByRef(S7.S7CpuStatusUnknown);
                                 ^
  symbol:   class IntByRef
  location: class ClientDemo
ClientDemo.java:204: error: cannot find symbol
        IntByRef PlcStatus = new IntByRef(S7.S7CpuStatusUnknown);
                                          ^
  symbol:   variable S7
  location: class ClientDemo
ClientDemo.java:210: error: illegal start of type
            switch (PlcStatus.Value)
                   ^
ClientDemo.java:212: error: cannot find symbol
                case S7.S7CpuStatusRun :
                     ^
  symbol:   variable S7
  location: class ClientDemo
ClientDemo.java:215: error: cannot find symbol
                case S7.S7CpuStatusStop :
                     ^
  symbol:   variable S7
  location: class ClientDemo
ClientDemo.java:248: error: cannot find symbol
                case S7.S7CpuStatusRun :
                     ^
  symbol:   variable S7
  location: class ClientDemo
ClientDemo.java:253: error: cannot find symbol
                case S7.S7CpuStatusStop :
                     ^
  symbol:   variable S7
  location: class ClientDemo
ClientDemo.java:264: error: cannot find symbol
        S7OrderCode OrderCode = new S7OrderCode();
        ^
  symbol:   class S7OrderCode
  location: class ClientDemo
ClientDemo.java:264: error: cannot find symbol
        S7OrderCode OrderCode = new S7OrderCode();
                                    ^
  symbol:   class S7OrderCode
  location: class ClientDemo
ClientDemo.java:274: error: cannot find symbol
        S7CpuInfo CpuInfo = new S7CpuInfo();
        ^
  symbol:   class S7CpuInfo
  location: class ClientDemo
ClientDemo.java:274: error: cannot find symbol
        S7CpuInfo CpuInfo = new S7CpuInfo();
                                ^
  symbol:   class S7CpuInfo
  location: class ClientDemo
ClientDemo.java:287: error: cannot find symbol
        S7CpInfo CpInfo = new S7CpInfo();
        ^
  symbol:   class S7CpInfo
  location: class ClientDemo
ClientDemo.java:287: error: cannot find symbol
        S7CpInfo CpInfo = new S7CpInfo();
                              ^
  symbol:   class S7CpInfo
  location: class ClientDemo
ClientDemo.java:318: error: cannot find symbol
        S7Szl SZL = new S7Szl(1024);
        ^
  symbol:   class S7Szl
  location: class ClientDemo
ClientDemo.java:318: error: cannot find symbol
        S7Szl SZL = new S7Szl(1024);
                        ^
  symbol:   class S7Szl
  location: class ClientDemo
ClientDemo.java:333: error: cannot find symbol
        S7Protection Protection = new S7Protection();
        ^
  symbol:   class S7Protection
  location: class ClientDemo
ClientDemo.java:333: error: cannot find symbol
        S7Protection Protection = new S7Protection();
                                      ^
  symbol:   class S7Protection
  location: class ClientDemo
ClientDemo.java:360: error: cannot find symbol
        Client.SetConnectionType(S7.OP);
                                 ^
  symbol:   variable S7
  location: class ClientDemo
ClientDemo.java:383: error: cannot find symbol
        BlockInfo(S7.Block_SFC,1); // Get SFC 1 info (always present in a CPU)
                  ^
  symbol:   variable S7
  location: class ClientDemo
33 errors
root@rpi:/opt/moka7-full-1.0.2/Moka7-Eclipse/src/Moka7Demo#

On Windows (importing project eclipse into IntelliJ) it runs fine. When I compile it on Windows and generating an artifact (.jar), I can run the artifact on linux just fine.
Am I doing something wrong?

When I'm executing the .jar file:

root@rpi:/opt# java -jar Moka7-Eclipse.jar
Usage
  client <IP> [Rack=0 Slot=2]
Example
  client 192.168.1.101 0 2
or
  client 192.168.1.101
root@rpi:/opt#

and I'm getting the Usage description, can I be sure the library will work? I don't have any PLC yet, but I wanna make sure everything runs fine as soon as the PLC arrives.

Best regards.