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Build Path vs. CLASSPATH [message #1219494]

Wed, 04 December 2013 09:08

Ratna Lein

Messages: 1
Registered: December 2013

Junior Member

Hallo everyone,

it is actually a very simple issue.

I have spent hours to understand the concept of build path and classpath under Eclipse.

We can configure the compile build path via Project --> Build Path --> Configure Build Path --> ...

We can configure the run time classpath via

I am looking for an example, where the build path and classpath are defined DIFFERENTLY.

Has someone any example or explanation in which cases it is wise to have the build path and classpath defined DIFFERENTLY?

Thank you for your help.

Regards,

Ratna Razz

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Re: Build Path vs. CLASSPATH [message #1219551 is a reply to message #1219494]

Wed, 04 December 2013 15:33

David Wegener

Messages: 1445
Registered: July 2009

Senior Member

The build path only needs to include elements (classes, jars, etc) needed to build your project. The classpath used when launching your application may need to contain other elements in order to properly run. For example, you may have resource files that need to be loaded but aren't required at build time. You may also use frameworks that are accessed by interface and have different implementations. When building your project, your code only refers to interface classes. At runtime the framework may then load classes based on configuration files or other class path lookup techniques. In this case you might need to add additional entries to the classpath. The build path will likely be a subset of the classpath.

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