Develop Reference

Google OR-Tools: Using in an IDE

I have the Problem that i want to add OR-Tools into my project via eclipse IDE. I want to use the Linear Solver. I added the two jars form the downloaded Zip file. Now i want to run the SimpleLpExample from the OR-Tools site. I've got the Error that no jniortools in java.library.path. I see that at other posts they say you have to run make third_party and make java, but i don't know where i have to run these commands.
When somebody added it successfully into an IDE it would be glade when this person can explain how he does it. Thanks for help.

No. You need to add the path to the jniortools shared library I'm eclipse.
All dynamic libraries are located in the lib/ directory of the extracted archive.
To add the correct path, please follow these instructions:

File Not found, is my package setup correctly

I should first mention that I'm still an undergraduate, so excuse "beginner" mistakes, I'm also using the intellij IDE.
It's entirely possible that I'm missing something rather obvious but why is this .txt file not found when it's in a source root. My package hierarchy looks to be fine.
Would appreciate if anyone could point me in the right direction, thanks in advance.
As you can see fileNotFoundException

Seems like your project is not on build path . On Intellij you can configure it as mentioned in this post:
How to add a project to build path in IntelliJ Idea
And then you can access it using absolute path :
getClass().getResourceAsStream("/com/path/to/file.txt");
Or relative CLASSPATH path (when the class you are writing is in the same Java package as the resource file itself):
getClass().getResourceAsStream("file.txt");
I would also suggest you to read here:
https://www.mkyong.com/java/java-read-a-file-from-resources-folder/

cannot paste clipboard contents into selected elements Eclipse

I'm trying to create a simple login form using servlets connected to database. But I got this error:
No JDBC driver found
I had added mysql-connector as external JAR file. After searching for solution on stackoverlow, it was suggested instead of adding it as external JAR file, copy paste it into WEB-INF/LIB folder. But whenever I try that, it gives me error:
Cannot paste clipboard contents into selected elements
How can I resolve this?
EDIT 1: Eclipse not allowing me to drag-drop either

To fix it in that case, extract the file(s) from the archive first(.rar,.tar,.zip), then c-and-paste the file into Eclipse. Works for me under Package Explorer, too.
OR Go for
project->clean
just go through that
Eclipse & JAR Hell
May be that Help you out !!

Instead of copy paste try to drag file and place it in web-inf/lib folder

please Be sure that the file is not from a zip folder.
If it is from zip folder extract it , then copy paste the file.

download winrar-x64 /winrar-x32
install winrar
now unzip ur files
copy paste in eclipse

Best Solution:
Yes i try to start learning JDBC and had to face this issue.
I read the stackoverflow posts but nothing seems to be solving my issue.
Then i did one thing
1.Right click the project
2.Go to properties
3.java Build path
4.libraries
5.Add external Jars
6.Add the jar file
7.hit ok to save
8.Then copy and paste same jar file into the project that you have done before
9.Success!you won't see any error prompt
I am happy now and i hope that you too when you follow this procedure 😊

Included jtds---.jar file into the libraries of my Java Project on NetBeans, but still having a ClassNotFoundException error

This is my first question here, and, for some reason, when trying to upload a screenshot of my problem, I got an error message which read
Failed to upload image; couldn't reach imgur
Anyway, I have uploaded it onto Google Photos, so I will send the link after explaining a little what it is.
I am new to developping Apps in Java, specially when it is about connecting to JDBC. So, as the target database is a SyBase one, I downloaded JTDS JDBC Driver from its official website on sourceforge
Afterwards I did what was suggested here so as to set up the class path.
Include jtds1.3.1 into the library and my project, so it was supposed to work, and... voilà!
A fantastic ClassNotFoundException when executing the Class.forName() method to load the driver.
Here is the screenshot, being lines 35 and 37 the ones of interest.
I would be so grateful should someone help me a little, however stupid may be the error I may be doing to have this problem - which sure it is.
Thanks.

Looking at that screenshot, the problem is that you added the distribution zip (jtds-1.3.1-dist.zip) to your buildpath, instead of the jtds-1.3.1.jar included in that zip. So unzip, remove the zip from the build-path and add the jar-file.

You have to put the full path to the jarfile in the classpath (including the filename):
.;C:\j2sdk1.4.2_16\jre\lib;
C:\Program Files\mysql-connector-java-3.1.144\mysql-connector-java-3.1.14-bin.jar
after change path once restart your cmd

How can I access the javadoc from a .jar file in netbeans

I recently downloaded the microba datepicker and it comes with three JAR files: the source code, the compiled coled and one JAR for javadoc.
I use netbeans and tried everything within my limited abilities to get access to that documentation, but just couldnt make it ... can you help me please to solve that problem?

To read the javadoc from a .jar-file one first has to unpack it. To do so, open your console, navigate to the folder where the jar file is located an unpack it using the following command:
jar xf yourFileNameHere.jar
Then you can access the documentation.

First you need to unzip the zip-file to your preferred location, go to your netbeans and on your project you search for Libraries and you right click on >>>Libraries and select >>>Add JAR/Folder located your extracted file and then click on open.

Try this method, Right click plusztester(prototyp) project and select >> Resolve Project Problems select the missing files and resolve them by locating the right files.