Installing your plugin
Installing your new plugin is quite simple. You copy the .jar file from the directory that you chose earlier and paste it into your server's plugins folder. Then start your server as you normally would and you will notice the console output informing you that your plugin is loaded as shown in the following screenshot:
If you do not see the Hello World! message when your server initially starts, don't worry. This is a normal behavior, because at this point, there will never be players online for you to broadcast your message to. For now we are only concerned with the messages that were highlighted in the previous screenshot.
Each time that you make changes to your code, you will have to build a new jar file and install the new version. To install the newer version you can simply copy and paste it into the server's plugin folder and overwrite the old file. This can usually be done without even shutting down the server. However, if the server is running, you will need to...
