Zake

At first make sure that you have imported this as a java project and not as a general project. Then go to eclipse and
1) Window -> preferences -> Java -> Installed JREs -> Add -> select path -> Apply and Close
2) Right click on your project -> Java build path -> Libraries -> double click on JRE System library -> alternate JRE -> select your desired java version (which will be 11 on your case).
3) Right click on your project again -> properties ->Java compiler -> Tick "Enable project specific settings if it's not -> then select your desired "Comiler compliance level" (11 on your case too).
4) Single left click on your project -> Source (top left of eclipse window) -> Clean up -> next  -> next bla bla -> finish
5) Right click on build.xml -> Run as -> External Tools Configurations -> JRE -> Separate JRE -> JDK 11 -> apply -> run
 
After all this procedure a single step would be fine in order to compile your project which will be "right click on build.xml -> run as -> 1 ant build

All you have to do is to create a voiced command which will search for your partner in game and teleport to him under circumstances

Make sure that you use "exc_multisell" instead of "multisell" as bypass

<table name="#mAtk"> 1.05 1.10 1.15 1.20 1.25 1.30 1.35 1.40 1.45 1.50 </table>  
Each one represents the value that will be multiplied/added to the stat you chose according to the skill level. 1.05 is for level 1, 1.10 is for level 2 and so on

Requestexenchantskill i think is the class. depending on the value you read from the client you should reward player with skill of level 130 or 170

Most of the times, when it comes to sql side npcs it's better to port them manually. In this occasion where custom_npc table is missing, try executing this in npc.sql instead. Although it would help a lot if you provide more information such as client/pack (consider doing this in any related topic) and a possible stacktrace. 

Siege#startSiege -> delete spawnSiegeGuard(); line

try to debug this one, see if returns false and why. If this is a static false then just remove it

Αν στο backup δεν έχει spawnlist και δεν έχει φάκελο με τα sql τότε πρέπει να χρησιμοποιήσεις άλλο pack, κατά προτίμηση κάποιο με source

Πολύ πιθανό να έχει γίνει save το παλιό pass σου στο navicat. Πήγαινε στο connection και βάλε σαν pass αυτό που έβαλες στο τελευταίο mysql installation

If switching the config value does not make any difference then find the config declaration in config.java. Right click -> open call hierarchy. This way you will find any call of this field inside your project

Topzone needs some kind of manual whitelisting proccess.

You can always override the method with a scaling algorithm or a static rate per level. I kinda don't suggest both but it would be less pain

That is not a bad number if you are fighting as duelist vs sps.You shouldn't worry about this since Duelist is useful only in small skirmishes. Sps on the other hand lacks in 1v1 situation but his teamfight value is by far higher. 

#rate is a table that you didn't post, although yes if you change #rate to 2 it will replace effects with stack order 1

Control+h -> search for this config -> find the declaration -> open call hierarchy

This is an intellij/eclipse feature, not a java 14 one. If you are using eclipse check at windows-> preferences-> Java-> Editor-> Save Actions, (depends on the eclipse version, path might be similar)

Locked

Πρέπει να είναι implemented για να λειτουργεί, ψάξε στα admin commands για παρόμοιο command

there might be a client edit for this