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am new to the java world and am having troubles in remembering the function names in various imports. So is there a way to open an import file and see all functions within it ?
basically what I need is the syntax.
The Java documentation is probably what you're looking for.
The frame on the left lists all the classes, and when you select one the main frame will list all of the functions, their parameters, and return values.
As #DanielGibbs stated, the Javadoc should be bookmarked so you can have it handy when you have a question.
But also if you use an IDE like IntelliJIDEA or Eclipse, you should also be able to find the Javadoc through some means like hovering over a class/method or with a Control-Click.
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This may sound really silly but there is a whole documentation of the libraries and classes in java and I am trying to learn how to use this to write programs since I don't want to refer to someone else code but I was completlely lost when I look at the documentation online: http://docs.oracle.com/javase/7/docs/api/
Can someone please help me understand how i can use this?
I think you need to go up one level and look at tutorials first: http://docs.oracle.com/javase/tutorial/. Once you understand the basics of Java, then you can use the API reference to find the classes and methods you need.
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I would like to know how to use java agent and how to install java agent.
I handle for the first time java agent.
So they are not familiar.
So please explain in detail.
Presuming that you actually mean agents as in instrumentation, check this tutorial:
http://www.javabeat.net/introduction-to-java-agents/
it will give you a quick start in writing your first agents and set up everything you need to get started.
Just on a side note: if you want specific, detailed answers, ask specific, detailed questions.
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Basically, I'm looking to find out how to apply Java patch files using Java. So, to sum that up, I need Java code to apply a patch file to a java source file.
Cheers!
There are many ways to extend functionality of the already developed Java application.
You can for example use external non-runnable *.jar files with some extra classes. To do so, you have to first implement proper "uploading" functions in your app, e.g. by using custom ClassPath objects, which is nicely described here, or you can try to use multi URLClassLoaders, which is described here.
There is also another approach, which allows you to call external methods in form of a String, but I haven't tested it yet, altough you can read about it here.
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I made a simple Java program using a JFrame. I want to know how is it called or what type it is. Maybe is it an API? Maybe a form?
If a ask something about my simple Java program
in a forum, I would like to do it properly! I used Eclipse.
Your wording is unclear, so I'm not exactly sure what you're asking. But it seems like that would just be called a Java desktop application.
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I am trying to figure out how they created all of the methods in java, because w/o these objects we wouldn't be able to do much. If there is any website you could link me, it would be much appreciated. & sorry if i am off topic.
http://grepcode.com/snapshot/repository.grepcode.com/java/root/jdk/openjdk/7-b147/
Here you can see the source code for all the standard library. For example, the String class:
http://grepcode.com/file_/repository.grepcode.com/java/root/jdk/openjdk/7-b147/java/lang/String.java/?v=source
I think the entire source for the standard lib also comes with the JDK, in some folder somewhere, but I don't remember.
Of course the standard library is not all that makes java, because you also have the JVM. But since you're talking about objects, I guess that's what you want.