Analyze lib usage within a packet - java

I have a problem regarding the usage of libs in Eclipse. I want to know which lib is used in which package.
I tried the search functionality but this did not really solve my issue.
I do not try to figure out which libs are used in general but which are used e.g. in the test package only.
Thank you in advance!

A simple method is to temporarily remove the library and see where you get errors.

Related

Using Libraries In Netbeans Java With Ant

This is my first StackOverflow question, and I'm also a Grade 12 student, so apologies if it is a stupid one - feel free to let me know if it is, however, after numerous hours searching the internet, I can't find an answer to this.
this is not homework help.
Background
I am currently writing a program in Netbeans that will deal with large COVID datasets, and I'm looking to use some external libraries to make operations easier. The ones I've looked at are
https://github.com/jtablesaw/tablesaw and https://github.com/nRo/DataFrame.
However, I have only ever used "Java with Ant", and both of these GitHub's only mention using the library through Maven dependencies in the pom.xml file. I have never used Maven, and I am very unfamiliar with Build Tools in general. As when I was introduced to Java, my teacher instructed me to use Java with Ant. That being the case, any time I have used an external library before I have simply added the .jar files into my library folder and used
import foo.bar; or import foo.*; to use the libraries.
My question
Is there a way for me to use either of these libraries without switching build tools? For example, download the source and make the .jar's in a way that isn't overly tedious, so that I can use the libraries the same way I am used to? Or, perhaps something I'm missing that allows me to download them in that format? If not, seeing as almost every Github library I find instructs me to use it through Maven dependency, should I stop using Java with Ant altogether and start learning how to write programs using Maven?
Any insight is greatly appreciated. If this has already been answered, feel free to link the answer and sorry for cluttering up the forum. Thanks.
From one of the Maven websites you can download the libraries and use them as normal. First find the artifact page, for example using mvnrepository.com as shown below, or you could use the https://search.maven.org/:
Find the relevant page by searching for the artifact, then once there you can choose the version:
Then click on "View all" to see the artifact jar files:
Then lastly right-click the file you need and choose save:

Is there a way to use external libraries in IntelliJ without downloading their .jars?

I am trying to write a standalone Java application in IntelliJ using edu.stanford.nlp.trees.GrammaticalStructure. Therefore, I have imported the module:
import edu.stanford.nlp.trees.GrammaticalStructure;
Currently, Intellij doesn't recognize this and many others of the imported external libraries (cannot resolve the symbols) and is also not able to automatically download/import them.
Is there a way to use the GrammaticalStructure class without having to download the entire Stanford CoreNLP .jar and adding it to the project as a library? This question applies to other dependencies as well, since I want to use other external libraries but avoid including their .jar files as much as possible (to minimize the size of the final application, given that it will be standalone). Unfortunately, all the solutions I have found proposed exactly that.
Apologies if I have overlooked some basic setting or setup steps, it has been a while since I have worked with Java.
Any help is greatly appreciated.
If you want to use it means you want to execute the code in them. How is the runtime supposed to execute code that is does not have? How is the compiler supposed to know how the code is defined (e.g. what the classes look like)? This is simply impossible. If you want to use the code you have to provide it to the compiler as well as the runtime.
If you just dont want to include all of that code into your application, you need either access to the sources and just pick the class you need or you need some kind of JAR minimizer as #CrazyCoder suggested.

May I add this package to my existing Java project?

I am beginning at Java GUI, so I ask you professional coders to be understading towards to my humble question.
So, I have been coding this small Java project. I came across a problem, which is to query a Json file. During my quest over the internet looking for an answer, I stumbled upon this project on github:
https://github.com/json-path/JsonPath
Which proved to be the solution for my problem. Everything I need to be able to search for specific nodes on a json file is there, hard coded.
My beginner question: Is that possible to include this 'JsonPath' in my existing project? The IDE is Apache Netbeans 10.0 and the project is a Java SE application.
Thanks in advance!
I tried searching Services->Maven repository->Find...
I happened to find this package but I have no clue how to add the package. Also, I am not sure if its possible to add it to my project.
At first I thought doing something like "com.jayway.jsonpath" to my main class would solve my problem - But obvisouly it didn't, that's why I'm asking you guys for some guidance.
You're going to want to use a dependency management tool like Gradle or Maven first. This gives you a place to put all of the third-party dependencies like this one in your project. (Note: how to use or install either of those tools is outside of the scope of this question.)
Then, you just need the Maven coordinates. Luckily the project has those coordinates available.

How to download Packages for Android Studio?

I just started Android Development yesterday and just finished with my first Activity. On running it, I'm getting errors like
**Error:(4, 37) error: package android.support.design.widget does not exist**
As I never post without it, I've already done plenty of searching on this. Basically, what I've understood is that it couldn't find that Widget Package on my PC. So, do I have to download it? If yes, then how?
People on internet had similar problem with Packages and almost every post has different answer to this. Some say change your Gradle File others say Update your Studio (have done it).
Any kind of explanation or bit of knowledge with the solution would be highly appreciated. I'm a kind of geek who want to get concepts and basics clear. So, it would be great if you include the reason and technicality behind this too with your answer. Thanks. :)
It's a design library for Android apps development and as #Dominique pointed have a look at that page and copy paste that compile 'com.android.support:design:22.2.0' line in your project gradle file and press the sync button. Your project will sync in a few moments and the design library will be downloaded. Now you can use this library and there won't be any errors.
No, in Java "package" is not a "library" or a "piece of software" (like it is in some other languages). Package is what classes belong to - you might think of packages as directories containing Java files (it is a simplification, but it works). In Java libraries are packaged into (usually) "jars" (those jars usually contain classes divided into packages), so what you need to download is "jar".
So, first thing you need to check is: what library contains the package, and configure your IDE accordingly. The package in question belongs, I think to the so called android support library, which you can install using the SDK tool.

Not able to find sun.awt.image.codec package

I searched a good lot but all in vain.
I want to get the source for sun.awt.image.codec.* java package.
Any help will be very appreciated..
Thanks
EDIT
Actually I have to use that package only, its required for my work. Its necessary for me since I am doing a performance eval [i can't change the code].
Update: This code is proprietary and the sources aren't available.
Try to use a decompiler or write black box performance tests.
Maybe you use OpenJDK? Install oracle jdk and try then.

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