How to install Tween Engine in Libgdx (Eclipse project)

Question

I am a newbie in Libgdx. I just started up Libgdx but I got struck up with TWEEN ENGINE ..!! I need the image to fade in and out. So I have added jar file as per this link Tween Engine but I am getting this error

Exception in thread "main" java.lang.NoSuchFieldError: isWindows
at com.badlogic.gdx.backends.lwjgl.LwjglNativesLoader.load(LwjglNativesLoader.java:44)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication.<init>(LwjglApplication.java:73)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication.<init>(LwjglApplication.java:61)
at com.myfirstgame.game.desktop.DesktopLauncher.main(DesktopLauncher.java:10)

I have added jar in libs folder under android project then I have also added as an external jar file under properties->Libraries but nothing worked out.I really don't know how to resolve it. Please help.Thanks in advance !!

Answer 1

I resolved the error.I have downloaded jar from this link TweenEngine extracted in a folder and added jar to my project.

I added jar by, Project->Properties->Libraries->and added both of the extracted files one by one.Then again,

Project->Properties->order and export->and click both of the jar files added click ok and Clean your project Its done :)