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Discussion on: Why won't Eclipse run my program? (Possibly the unresolved error from before).

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Replies for: Tried it. It doesn't work. The visibility of the class doesn't (and shouldn't) matter. It's the visibility of the entry point (Main.main). But tha...

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Thorsten Hirsch • • Edited

In such a case I try to run things from the command line. And it works:

$ javac -cp . RuntDeale/code/Main.java
$ java RuntDeale.code.Main
$ tree
.
└── RuntDeale
    └── code
        ├── Main.class
        └── Main.java
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So the problem is probably some wrong setting in Eclipse or a different directory structure than what Eclipse expects. My directory structure in the shell snippet is plain java with a directory for each part of the package name (separated by a dot). Java's classpath needs to be set to the current directory, so that it can find the Main class (-cp .). But your Eclipse project has at least an additional src directory as entry point. When I start new java projects I use maven or gradle and follow their directory structure, which also have your srcdirectory, but additionally a main and a java directory. Then I can use any Java IDE, because they all support maven's directory structure.

P.S.: Actually you don't need -cp, yet, as long as you've got a single .java file only.