I am looking for a design pattern to handle Exception instances received as method arguments. To put some context into the question, I am using GWT and have various asynchronous handlers that usually come in a form similar to: So, the onFailure method receives a Throwable instance that I need to handle. Now, …
Tag: exception
Code in “catch” block not executing
please help me understand why:) My program reach the “try” line, but seems to skip the “catch”, Although its printing the stacktrace… I’m using JOptionPane in my catch, but also System.out.println() not working. Code: Exception: Answer There is an NullPointerException inter…
How do I put something on an FX thread?
I’m new to JavaFX (trying to move from Swing), and am trying to make a very basic window first. However, I keep getting the following runtime exception: However, looking at the JFXPanel source code, the constructor calls its initFX() method, which initializes the FX application thread. Why, then, am I g…
Difference between e.getMessage() and e.getLocalizedMessage()
What is the difference between the getMessage and getLocalizedMessage methods on Java exceptions? I am using these both methods to get the message thrown by the catch block while performing error handling. Both of them get me the message from the error handling, but how exactly do these two differ? I did some…
What is an AssertionError? In which case should I throw it from my own code?
In Item 2 of the “Effective Java, 2nd edition” book, there is this snippet of code, in which the author wants to forbid the empty initialization of an object. The type of exception thrown, is what confuses me here. I don’t understand if the AssertionError is thrown just because of an absence…
Throw exception vs Logging
Is the following way to code good practice? Moreover, should I.. use only the logger? throw only the exception? do both? I understand that with throw I can catch the exception in another part of the callstack, but maybe additional logging has some hidden benefits and is useful as well. Answer I use both in so…
Is it a known good practice to use a big try-catch per method in java? [closed]
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 9 years ago. Improve this question I’ve been interviewed recently and the interviewer wanted me to…
java, OutOfMemoryError: Java heap space
This class is designed to determine the language of a text; the user has to enter 4 text in english, danish, italian and latin, and then the text whose language he wants to determine. The console says I use eclipse, in Run Configurations – Arguments I wrote -Xms2g-Xmx3g. I don’t understand where i…
Should the Exception.Message property be shown directly to users? [closed]
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 8 years ago. Improve this question That may sound like a silly question but I’d like to gather som…
Java catch block, caught exception is not final
I am checking out the new features of Java SE7 and I am currently at this point: http://docs.oracle.com/javase/7/docs/technotes/guides/language/catch-multiple.html regarding the catch multiple feature, when I came across this statement: Note: If a catch block handles more than one exception type, then the cat…