- What is Exception chaining in Java?
One of the important exception handling concept in Java when a different exception is thrown in response to an actual exception. This in turn will create a chain of exceptions. This is commonly used to wrap a checked exception to unchecked exception under various scenarios and such coding prevails when actually writing a framework in which case a known checked exception is thrown as an unchecked framework exception. Even though new exception is thrown, as a best practise always include the root cause (exception) in the newly created exception class.
- With regards to JDK7 there is a new feature with regards to Exception handling. Can you detail this?
There are numerous small and medium new features on JDK7 which are very useful. Some of them with regards to error and exception handling is as detailed below:-
- Multiple exception handling in one catch block
Reduces code cluttering and are more readable.
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public static void main(String args[]) { //...Code try { //..Code } catch (NumberFormatException | IllegalArgumentException e) { e.printStackTrace(); } } |
- ARM (Automatic Resource Management) blocks
As the name suggests it is capable of automatically handling resources on behalf of you, also known popularly as try with resource. Takes lot of botheration away from developers. Below is the example from oracle java docs:
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static String readFirstLineFromFile(String path) throws IOException { try (BufferedReader br = new BufferedReader(new FileReader(path))) { return br.readLine(); } } |
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Tomcy John
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post with 200 interview questions on Java.
http://www.buggybread.com/2013/07/java-interview-questions-and-answers.html
excellent
Thanks for sharing this important java interview questions and answers on Exception Handling.