Compile .java to .class, with all errors kept

**KamikadZee** · 10-24-2011, 02:28 PM

So what i need.
Is to compile .java file (witch ofcourse contains lot of errors but all those errors ar expected and needed, cuz that .java file is from really big package)
And for example like :
This imports not exists (in eclipse project or in same folder if i compile with cmd) so I need them kept anyway I don't really care if java compiler sees it as error, and fixes it for me...

Java Code:

 
import gnu.trove.TIntIntHashMap;
import gnu.trove.TIntObjectHashMap;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.List;
import java.util.Properties;
import java.util.StringTokenizer;
import java.util.logging.Logger;
import javolution.util.FastList;
import net.sf.l2j.gameserver.util.FloodProtectorConfig;
import net.sf.l2j.util.StringUtil;

This was the original import, and while i compile with "Eclipse" using java-builder,

It gives me sharpen/cut out/fixed/replaced/recreated - f*** code...

Java Code:

 import FastList;
import TIntIntHashMap;
import TIntObjectHashMap;
import java.io.File;
import java.util.List;
import java.util.Properties;
import java.util.logging.Logger;
import net.sf.l2j.gameserver.util.FloodProtectorConfig;

I really wanna use eclipse in future cuz it's like home for me now. But this all compiling situation frustrating me really badly.
And the worst part, i can't find answer anywhere around the internet,
And I tried to change preferences In whole eclipse, tried to change preferences in Project menu,
Well I just didn't find any solution.
I'm using : jdk1.7.0_01
Classic Eclipse SDK without any custom plugins,
So is there anyway configure java compiler to skip errors or it's about eclipse (But i think it javac(compiler))

I'm sorry for my (hopefully good enough to understand) English.

**KevinWorkman** · 10-24-2011, 02:35 PM

I'm not sure what you mean. Are you saying that the compiler is removing the unused imports from your .java file? That shouldn't happen, the compiler shouldn't modify the source code at all. What happens when you compile from the command prompt?

If I understand you correctly, I believe your problem has less to do with the compiler and more to do with an eclipse setting somewhere. I would google something like "eclipse remove unused imports"- if you find out how to turn it on, you should know how to turn it off.

**KamikadZee** · 10-24-2011, 02:42 PM

Yep i found that. the option in eclipse with unused imports. Eclipse set up fine i'm sure i've been playing around it now for few days with the same problem.

Compile via cmd gives me this :

Java Code:

 Config.java:3: error: package gnu.trove does not exist
import gnu.trove.TIntIntHashMap;
                ^
Config.java:4: error: package gnu.trove does not exist
import gnu.trove.TIntObjectHashMap;
                ^
Config.java:16: error: package javolution.util does not exist
import javolution.util.FastList;
                      ^
Config.java:17: error: package net.sf.l2j.gameserver.util does not exist
import net.sf.l2j.gameserver.util.FloodProtectorConfig;
                                 ^
Config.java:18: error: package net.sf.l2j.util does not exist
import net.sf.l2j.util.StringUtil;

and keep going, I know that package doesn't exist, I realize that and I need that.
Cuz when i get .class file, I'll just put it to .jar file, and everything will work.
So what i need is to make java compiler skip all errors and just make me .class identical to .java file, with all errors exceptions etc... (even if some not used variables)
So how to deal with that?

**KevinWorkman** · 10-24-2011, 02:47 PM

I'm not sure you can do what you're asking. An import simply tells the compiler which class you mean. For example, if you use a List, the compiler will look to your imports to see whether you mean java.util.List or java.awt.List. If it can't figure out an import, it doesn't know which classes it contains, so it can't go on with its job.

Why do you think you need to do this?

**KamikadZee** · 10-24-2011, 02:56 PM

Ok so here full story maybe u will understand me.
I have .jar files pack(and they connected with each other in .class files) its :

Java Code:

 
c3p0-0.9.1.2.jar
ecj-3.6.2.jar
java-engine.jar
javolution.jar
jython.jar
jython-engine.jar
l2jserver.jar
mmocore.jar
mysql-connector-java-5.1.14-bin.jar
trove-2.1.0.jar

I need to edit only l2jserver.jar
I decompiled it from .class , to .java with JD-gui, (But ofcorse alone it will have alot of errors, But i really don't care about it cuz i know what i'm editing and doing in that file. Errors will be like : Missing import "import gnu.trove.TIntIntHashMap;" I know that it will work when i put edited class file back to l2jserver.jar)
so next
Imported as a project to eclipse, edit it there ant everything looks fine
I just can't get the source code to .class exactly the same as in .java (Because compiler/builder removes Imports variables which don't exist atm cuz it's taken out of package)
So what I need, Is to compile .java to .class with exactly the same source skipping error fixes, or any kind of modifications from compiler, i just wanna file same as .java

I hope this was clear

**KevinWorkman** · 10-24-2011, 02:58 PM

Yeah sorry, I don't think there's a good way to do that. Maybe somebody smarter than me can come up with a hack for you, but I'd say your best bet is to just recompile everything you need and make a new Jar.

Also, why are you decompiling? Don't you have access to the source?

**KamikadZee** · 10-24-2011, 03:00 PM

I'm completely new to java, (I know just fundamentals of language which allows me to edit game server modifications etc...)
So decompiling is the easiest way for me for now.

**KevinWorkman** · 10-24-2011, 03:05 PM

Originally Posted by KamikadZee

I'm completely new to java, (I know just fundamentals of language which allows me to edit game server modifications etc...)
So decompiling is the easiest way for me for now.

Fair enough. But I think you're hitting one of the many downsides to that approach here. It's going to be a lot easier to work with actual code instead of going back and forth between a .java and .class file.

**KamikadZee** · 10-24-2011, 03:09 PM

So ok, one more question
I don't know alot but,
I can get source code example via SVN client right?
(Cuz i downloaded entire server files just from simple http, And if do that through SVN, i'll get source code? or I missed something?)

**KevinWorkman** · 10-24-2011, 03:18 PM

Originally Posted by KamikadZee

So ok, one more question
I don't know alot but,
I can get source code example via SVN client right?
(Cuz i downloaded entire server files just from simple http, And if do that through SVN, i'll get source code? or I missed something?)

It depends on what exactly you're talking about- many open source projects are on SVN, some aren't. But you might want to get a little more acquainted with the basics before you dive into tackling a big project.

**KamikadZee** · 10-24-2011, 03:32 PM

yeah like i sad i know just fundamentals of object programming so, I'll try to learn java, Just my opinion is solving problems getting big source codes Is the next steps after basics, So you have to think on your self not just listen what others saying, So that's why now i'm trying to edit end setup game server,
Thank you for your time :) Was nice meeting you. Off for now :)