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What platform does `&&` not work on? It works fine in Windows `cmd`, which is the typical shell to worry about portability with.

cmd's `&&` is the equivalent of bash's `;`. bash's `&&` has no equivalent in cmd.

Edit: Never mind, I'm apparently wrong.

On Windows 7; note the lack of version information from Java:

> rm test.txt && java -version

rm: cannot unlink entry "test.txt": The system cannot find the file specified.