St Xaviers College Zipped Eclipse Solution Folder Project

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User Generated

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zvpunrynyyra

Subject

Computer Science

Description

Solution: EX-1 Create a user defined exception sub class that accepts an integer in its constructor.  Extend the Exception class  Have a private value that is initialized by the constructor  Override toString to display a custom message that uses the private value. In a main method:  Use two text files, file1 and file2, to invoke your exception (via file1) and a general exception (via file2).  Access the files using a method discussed in chapter 13 o Prompt the user to “Enter 1 or 2” for which file they want to use for a given run. o Or, run from the command prompt and take the file name in as the first parameter  Use a try with resources block to access the file selected and trigger the exception. o For a general exception, you can force it or simply throw it directly yourself.  Catch your exception and issue a message.  Catch a general (nonspecific) exception and issue a message, then rethrow a general exception.  Use a finally clause to issue a closing message. Submit the zipped Eclipse solution folder.

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CPSC-4148\6648 Assignment 1 Exception handling exercise: Solution: EX-1 Create a user defined exception sub class that accepts an integer in its constructor.  Extend the Exception class  Have a private value that is initialized by the constructor  Override toString to display a custom message that uses the private value. In a main method:  Use two text files, file1 and file2, to invoke your exception (via file1) and a general exception (via file2).  Access the files using a method discussed in chapter 13 o Prompt the user to “Enter 1 or 2” for which file they want to use for a given run. o Or, run from the command prompt and take the file name in as the first parameter  Use a try with resources block to access the file selected and trigger the exception. o For a general exception, you can force it or simply throw it directly yourself.  Catch your exception and issue a message.  Catch a general (nonspecific) exception and issue a message, then rethrow a general exception.  Use a finally clause to issue a closing message. Submit the zipped Eclipse solution folder. CPSC-4148\6648 Assignment 1 Class EX-1 { class MyException extends Exception { private var; MyException(value to initialize private var) { Init private var; } public String toString() { return "message that includes private var"; } } } public static void main(String[] args) { Prompt user for which file to use (file 1 or 2) or take it in as the first parameter passed to the program. Try with resources { Access the file to be used. Provoke or throw the exception } catch(MyException myex) { Print appropriate message } catch (general exception) { Print appropriate message Rethrow general exception } finally { Print closing message } Print “this is the end of the main method” } }
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