Java unreported exception

by

What you’re referring to are checked exceptions, meaning they must be declared or handled. The standard construct for dealing with files in Java looks something like this:

InputStream in = null;
try {
  in = new InputStream(...);
  // do stuff
} catch (IOException e) {
  // do whatever
} finally {
  if (in != null) {
    try {
      in.close();
    } catch (Exception e) {
    }
  }
}

Is it ugly? Sure. Is it verbose? Sure. Java 7 will make it a little better with ARM blocks but until then you’re stuck with the above.

You can also let the caller handle exceptions:

public void doStuff() throws IOException {
  InputStream in = new InputStream(...);
  // do stuff
  in.close();
}

although even then the close() should probably be wrapped in a finally block.

But the above function declaration says that this method can throw an IOException. Since that’s a checked exception the caller of this function will need to catch it (or declare it so its caller can deal with it and so on).

More Related Contents:

  1. When to catch java.lang.Error?
  2. Why is the Catch(Exception) almost always a bad Idea?
  3. How do you implement a re-try-catch?
  4. Java: Global Exception Handler
  5. Differences between Runtime/Checked/Unchecked/Error/Exception
  6. Throws or try-catch
  7. What is a suppressed exception?
  8. Java uncaught global exception handler
  9. What are reasons for Exceptions not to be compatible with throws clauses?
  10. Guidelines on Exception propagation (in Java)
  11. Who is calling the Java Thread interrupt() method if I’m not?
  12. Why do Java people frequently consume exceptions silently?
  13. In Java how can I validate a thrown exception with JUnit?
  14. Why am I getting “must be caught or declared to be thrown” on my program?
  15. Why exception occurs in this program?
  16. How can I solve “java.lang.NoClassDefFoundError”?
  17. What are the effects of exceptions on performance in Java?
  18. ClassNotFoundException com.mysql.jdbc.Driver [duplicate]
  19. How to create custom exceptions in Java? [closed]
  20. Given final block not properly padded
  21. Null check chain vs catching NullPointerException
  22. Why is exception.printStackTrace() considered bad practice?
  23. Why does division by zero with floating point (or double precision) numbers not throw java.lang.ArithmeticException: / by zero in Java
  24. try with resources introduce unreachable bytecode
  25. In a Java 7 multicatch block what is the type of the caught exception?
  26. Android exception handling best practice?
  27. What is meant by abstract=”true” in spring?
  28. Should java try blocks be scoped as tightly as possible?
  29. Illegal operation on empty result set [duplicate]
  30. Uncatchable ChuckNorrisException

Leave a Comment