I am trying to access a java class via C# and I am not sure on how to pass the required parameters to instantiate it.
I need to pass an object of type [java.util.Properties] to the constructor and I need your inputs on which jar/java class files I need to convert to dll using IKVM..
From the java implementation, it looks like I need to include java.util.dll and java.lang.dll. Any help will be appreciated!
Kindly let me know if the above description is not clear!!
I had to reference IKVm.OpenJDK.Core.dll in my c# project to start using java.util.Properties.
If you want work with IKVM then you need ever IKVM.OpenJDK.Core.dll. See also in the wiki.
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I have three different classes written in python. They contain several methods which I want to use them inside my java program (creating objects from these python classes and use these objects to call the methods). Actually my level in java might be intermediate. However, i am absolutely new in python. I have read that it is possible to use Python class methods inside java but there is no clear way that is well explained. So, please help me with a script or a tutorial or any advice that can help understanding using python classes methods in java.
Jython is the way to go. If you have a couple of hours I would recommend you go over the tutorial for it.
If you are curious to see how jython can be used inside java skip to:
http://wiki.python.org/jython/LearningJython#integrating-jython-python-into-java
I'm working on a project that requires me to run this code in java, but for a brief part of the code I want to access a class that is written in Objective-C. I want to pass parameters through the class then retrieve the data back into my Java file.
So to try to explain it clearer. My Java code needs to be able to access an Objective C file and retrieve data that I can implement in Java. My current IDE is eclipse, because I need to do this for android. Is there any possible way to make this work?
You can use Rococoa, http://code.google.com/p/rococoa/, or you can use JNI
Here is a similar question with answer: Wrapping an existing application with JNI
Have a look at JIGS, the Java Interface to GNUStep. http://www.gnustep.it/jigs/
I was wondering if there is a Java method for injecting code into a process during runtime.
The key term; in Java. I have found alot of references to this (the most useful being at this website). The problem is that that all the references I've found do not use Java, and hence are unfavorable for my current situation.
Could anyone help me out, and perhaps point me in the right direction?
You can use Java Native Interface to bind CreateRemoteThread() API to Java.
The closest I know of is System.loadLibrary. That method will load a library by name in a system dependent way.
One way would be to load the non java library you found using Java Native Access. I don't really see a way you will be able to do this without calling native code so unless a some other java developer has already created a JNI or JNA wrapper you will probably have to do it yourself.
can someone guide me?
Is it possible to get information of .class file (in java) without the use of reflection? Information like class methods,constructors fields etc., and also can we invoke them without using Reflection in Java?
thanks in advance.
You can analyize the .class in terms of bytecode. Either manually or using a library like BCEL
See Java Virtual Machine Spec, Chapter 4 The class File Format.
Friends,
I'm working on a requirement where I need to call a Java API from Apex.
The solution I put forward was to create a Java class, store it the database and add a PL/SQL wrapper and then use it. Which is pretty much what is described here.
Whilst I am happy with this, I am interested to know if this is the only method? are there other options that I could explore?
Thanks in advance
From what I've seen, APEX doesn't have anything special for calling Java Stored Procedures.
So it's the same thing as calling a Java SP from within PL/SQL.
As can be seen here there is no other way of doing it beside the one you use now.
I would just add that what you actually call a wrapper is in fact the way a Java SP is published to the data dictionary(it makes it available to the SQL/PLSQL contexts). In your case you do it by defining a top-level call specification. Alternatively you can publish it by defining either a package or an object type call specification. For more details see this link.