Exceptions

• idea

  • try some code, an error may be thrown, catch and handle
  • try {some code} catch (Exception e) {handle error}
  • allows (near) automatic error propagation, and
  • code not littered with error-handling cases

• control flow

  • execute try code
  • control goes from throw point directly to first matching catch on the caller stack
  • if no error, then catch is skipped
  • finally is always executed, if error happens or not, but always after error handling
  • VM catches all unhandled exceptions, and aborts

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