Develop Reference

Java class can't read the jar file

i'm using eclipse noen and i've created a jar file contains only one java file. but when I added to the application library it still can't be seen.

Can you post the strutcture or an example of the contents of the JAR file?
JAR files should contain compiled java classes, not ".java" files.
If you are using Eclipse, create the JAR file by exporting the project.
Reference: https://help.eclipse.org/mars/index.jsp?topic=%2Forg.eclipse.jdt.doc.user%2Ftasks%2Ftasks-33.htm

Create jar file online convert show me error

i have following code of java, how to create jar file because when i create jar file its show me error please help me , jarfile name and folder same as i enter in zip please convert only zip to jar. i was convert zip to jar but my jar file does not run. thats why i am here
Zip File Link convert to jar file

If you are using netbeans IDE then right click on the project name go to properties->build->packaging.
check build jar after compiling option and ok. then click on clean and build project.
You will find your jar file in the dist folder.
EDIT: if you are using Eclipse IDE check this post. how to create jar file using eclipse

How to make jar from a spagoBi source edited java file?

I have edited LDAPConnector.java file from the spagobi source code. How can I build jar for the same and replace it with origin?

Jar linking issue in Scala

What i do:
1.I am running a scala project,When i added the java source code(java file) in to the project it run
2.I need to add the jar file the project instead of the java source file
3.So i created jar file for the java source file in eclipse and added the jar file in the scala project instead of the java source file
4.But it shows error,when calling the method in the jar file
5.When i added the jar which i created in the java project,it works
Things i need to know:
1.Is there any different ways to add jar(created in java) in the scala project?
2.Whether i need to create jar in any other way?

What is a sources JAR?

I was recently trying to import a library to use for something I am working on.
https://sites.google.com/site/piotrwendykier/software/jtransforms
I was having some difficulty because the JAR that I added to the build path was the "JTransforms-3.0-sources.jar" and not the "JTransforms-3.0.jar".
Now I am sort of scratching my head and just wondering what that first sources.jar was if it didn't have any of the classes that I wanted to use in it.
What is it and what is it for?

That sources jar is a jar that contains only the source code (the .java files) corresponding to the compiled artifact. It is useful to add it as a source attachment in your IDE, to publish the sources, etc.
As it only contains sources, not compiled classes (.class files), it is of no use as a library dependency.

What is it: Source JARs are the JAR file which contains only source code files i.e. .java files, and no compiled .class files. For example, you can download OpenJDK™ Source files from http://download.java.net/openjdk/jdk8/
What is it for: It is useful for other developers so that they can 'attach source' and debug into their project source code.