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javaexceptionnullpointerexceptionbufferedreader

Can BufferedReader be closed automatically in Java

I was getting an warning on resource leak (BufferedReader was not closed). I fixed that by putting a close statement before the Return statement and ran the program. But I got an NullPointerException. My question is can it be closed automatically (somehow) when file reading was done. This question looks similar though.

Solution

  • You can use try-with-resources Java 7 feature:

    try(BufferedReader rdr = new BufferedReader(...)) {
     ...
}

    it will be closed automatically when exiting block

    http://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html