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I am studying to use an open source library. But when I right click some example java files, some file gives me an option like “run as application”, which make senses to me. But some others just give me an option like “run configuration” without other options. While some others just give me an option like “run on server” without other options. What do “run configuration” and “run on server” mean? I am using Eclipse IDE.
Eclipse is doing its best to figure out what type of file you have and how you can execute it based on contextual clues.
“Run on server” lets you test web applications on an application server you have configured in your servers view. This generally appears if your active file is part of a web application.
“Run as application” tries to execute a Java class directly by calling its
mainmethod.“Run configurations” are definitions for how Eclipse should execute a particular file, including things like VM arguments, command line arguments, etc.
There are other “Run as …” that will appear for other file types, such as “Run as JUnit Test”, etc.