Here are the steps to follow to install JADE:

1. Download JADE-all-3.6.zip file from the following address: http:https://jade.tilab.com/download.php
2. Unzip the file
3. Create a project called Agent Project
4. After creating a project, now you are building a JADE path. In the Package Explorer, Right Click on Project Click on BuildPath and then click on Libararies.
5. In Java BuildPath Click on AddExternal jar
6. Choose the path where you saved "...\JADE\bin\lib\jade.jar"