| # Overview |
| Java interpreter for Apache Zeppelin |
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| # Architecture |
| Current interpreter implementation supports the static REPL. It compiles the code in memory, execute it and redirect the output to Zeppelin. |
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| ### Technical overview |
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| * Upon starting an interpreter, an instance of `JavaCompiler` is created. |
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| * When the user runs commands with java, the `JavaParser` go through the code to get a class that contains the main method. |
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| * Then it replaces the class name with random class name to avoid overriding while compilation. It creates new out & err stream to get the data in new stream instead of the console, to redirect output to Zeppelin. |
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| * If there is any error during compilation, it can catch and redirect to Zeppelin. |
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| * `JavaInterpreterUtils` contains useful methods to print out Java collections and leverage Zeppelin's built in visualization. |
