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We recently had an issue with an Eclipse project for one of our team members. Tomcat was not deploying JARs of the application.
We eventually noticed the .classpath Eclipse file was not the same as for the team members where the project was OK. We replaced the .classpath file with one from a project that was OK and the Tomcat deploy was complete.
Just out of curiosity and to know at what to look in the future if something is wrong, what is inside the .classpath and .project files. What can I add in there, what does it all mean?
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classpath maintains the project's source and target references for Java compilation and compressed file or project dependencies. This configuration is maintained through the Java Build Path page in the project's properties.
In Eclipse, go to Window > Preferences > Java > Build Path > Classpath Variables.
Basically, . project files store project-settings, such as builder and project nature settings, while . classpath files define the classpath to use during running.
File created by Eclipse when creating a new project; saved in an XML format and contains the project name, build specifications, and dependencies; used for saving and loading projects into the Eclipse IDE; uses the filename .
What are classpath of projects in Java eclipse projects? You can include Jar files to which you need to set the classpath in the eclipse project using build path Step 1 − Right click on the project Select Build Path → Configure Build Path. Step 2 − Select libraries select Add External JARs … button.
Virtually everything you see in Eclipse is the result of plugins installed on Eclipse, rather than Eclipse itself. The .project file is maintained by the core Eclipse platform, and its goal is to describe the project from a generic, plugin-independent Eclipse view. What's the project's name? what other projects in the workspace does it refer to?
Basically, .project files store project-settings, such as builder and project nature settings, while .classpath files define the classpath to use during running.
If the file is deleted, eclipse can't recognize the project as a normal java project, just as a normal folder, which leads to the failure of normal operation. 3. Classpath content The. classpath file is also a content file in xml format.
Eclipse is a runtime environment for plugins. Virtually everything you see in Eclipse is the result of plugins installed on Eclipse, rather than Eclipse itself.
The .project file is maintained by the core Eclipse platform, and its goal is to describe the project from a generic, plugin-independent Eclipse view. What's the project's name? what other projects in the workspace does it refer to? What are the builders that are used in order to build the project? (remember, the concept of "build" doesn't pertain specifically to Java projects, but also to other types of projects)
The .classpath file is maintained by Eclipse's JDT feature (feature = set of plugins). JDT holds multiple such "meta" files in the project (see the .settings directory inside the project); the .classpath file is just one of them. Specifically, the .classpath file contains information that the JDT feature needs in order to properly compile the project: the project's source folders (that is, what to compile); the output folders (where to compile to); and classpath entries (such as other projects in the workspace, arbitrary JAR files on the file system, and so forth).
Blindly copying such files from one machine to another may be risky. For example, if arbitrary JAR files are placed on the classpath (that is, JAR files that are located outside the workspace and are referred-to by absolute path naming), the .classpath file is rendered non-portable and must be modified in order to be portable. There are certain best practices that can be followed to guarantee .classpath file portability.
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