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Import of excuting jar doesn't work in eclipse

I deleted my project permanently and I want to import my old executing .jar into eclipse.
Eclipse import function does not find anything it the jar file.
Can someone give me a tip or recover the file?
Here is a screenshot of eclipse
Thank you
Click here for the file to recover

You cannot recover the project. You did not set to export source files while exporting, there are only .class files.
For future reference select Export Java source file and resources while exporting the project.
Reference: http://www.albany.edu/faculty/jmower/geog/gog692/ImportExportJARFiles.htm

I am curious to know if it's jar why do you want to import as a project?
You can import external jar as a "APP Client Jar File" which is under Java EE.
I tried this with your attached jar and I am able to import it and able to see the content in it.

You are mixing a few things. If you deleted your project source you won't be able to recover it unless you decompile it, and it will be obfuscated even though.
What you have is the compiled project, resulting from taking your source (.java) and compiling it to .class files.
The Import option in Eclipse is made for importing .project files, that hold your project's information. Also you could create a new project from your existing code but as far as I know you just can't create/recover a project from it's compiled jar.

Import library into eclipse non gradle project

I am very new to Android development. I am not using gradle. I want to use the following library
Can you please let me know how to include in my project.
When I clone your project to eclipse(Mars) it is showing the following structure-
My project structure is given below.
Now shall I copy the "lib" folder (lib\src\main...) to my "src" folder?
Normally I add the library like the following way-

Just import the lib folder of the library instead of the whole library in Eclipse. And add it as a library to your project.

How would I import a library to a java selenium project?

I would like to use the java library Faker, which generates fake data.
http://dius.github.io/java-faker/
Since I can't import it, how can I add the files from the zip into my project.
This is my current project structure
Project
src
default package
FirstProgram.java
JRE System Library
Referenced Libraries
Any help is greatly appreciated!!

Extract the Zip.
Right Click on Referenced Library -> Build Path-> Configure Build Path
Import the extracted zip in your library

Importing JParsec in Eclipse

I downloaded both the .jar file and the "source and documentation" zip archive from the JParsec download section. Somehow I failed to import the JParsec source code using the Eclipse IDE (and also to find any documentation). Can someone please explain how to import it?
Thanks a lot!

You need to create a Java project and add the appropriate .jar file into the build path. You can also link the source file to the .jar file using the "Build Path" choice.

The codehaus project is no longer active, jparsec is now hosted on github. If you clone the source code from there, you can import the project using the maven plugin for Eclipse, or alternatively do mvm eclipse:eclipse inside the project source tree and then open the project in Eclipse.

Questions on how to import google-api-translate-java.jar

I am now going to use the .jar file on http://code.google.com/p/google-api-translate-java/. However, after I download it, I tried to import it in my current project folder (in Eclipse)
the two import statements
import com.google.api.translate.Language;
import com.google.api.translate.Translate;
always get complained by the compiler saying couln't find such class
Could any one help on how to correctly import this .jar file into a project in Eclipse?

You need to add it to your build path. Right-click on the project in Project View, select Build Path->Configure Build Path, then Libraries tab. Now, use one of available options there to add a JAR.
Use "Add JAR" if you copied the jar to your project folder or "Add External JARs" to add it by poiting to a path in filesystem. (Anyway, it is better to copy the jar to the project folder, in which you want to use the jar).
HTH

see How to import class into existing Java project, with Eclipse

Copy the google-api-translate-java-0.92.jar file to your project /WEB-INF/lib/ folder and refresh your project (right click on project and select "refresh").

Google Translate API v1 is deprectaed and will shutdown soon.
You can use Google Translate API v2 Java. It has a core module that you can call from your Java code and also a command line interface module.

Hy I have faced the same issue and fixed it
Step1: download google-translate-api jar file
step2: paste into your app library file
step3: Goto project structure > app > select dependencies -> then add path of your jar file...
Enjoy now you can acess google api services