0
What else can I help you with?
Which of these class is related to all the exceptions that can be caught by using catch?
You can catch all exceptions by catching the superclass Exception.try {// Do some wacky stuff} catch (Exception e) {System.out.println("I've gone nuts");e.printStackTrace();}
Describe the JAVA throwable class hierarchy and types of exceptions?
In Java there are two main types of Exceptions. * Checked Exceptions - The ones that can be checked & handled in our code. Ex: I/O Exception, SQL Exception etc. In most cases, the compiler itself forces us to catch & handle these exceptions * Un-checked Exceptions - The ones that we cannot & should not handle in our code. Ex. Null Pointer Exception The java.lang.Throwable is the super class of all errors and exceptions in Java. Only objects of this class can be thrown & caught and handled by try-catch blocks. Ex: try { ..... ..... } catch (Exception e){ ... } finally { ... }
What is defferred exceptional handling?
Deferred exception handling refers to a programming design pattern where individual class level methods do not handle exceptions using try catch blocks. They just cascade the exceptions to the calling methods using the "throw" keyword and all exceptions are handled centrally in one place. This is called deferred exception handling where the exceptions are deferred in the place where they occur and propagated to a parent class which handles it.
What is the implication of catching all the exceptions with the type Exception?
though catching exceptions is a good practice inside java code, catching all exceptions of the type exception is not the best way to go. Specific exceptions need to be caught instead of the generic Exception being caught. Also, different types of exceptions need to be handled separately.
Checked and unchecked exceptions?
Unchecked exceptions : * represent defects in the program (bugs) - often invalid arguments passed to a non-private method. To quote from The Java Programming Language, by Gosling, Arnold, and Holmes : "Unchecked runtime exceptions represent conditions that, generally speaking, reflect errors in your program's logic and cannot be reasonably recovered from at run time." * are subclasses of RuntimeException, and are usually implemented using IllegalArgumentException, NullPointerException, or IllegalStateException * a method is not obliged to establish a policy for the unchecked exceptions thrown by its implementation (and they almost always do not do so) Checked exceptions : * represent invalid conditions in areas outside the immediate control of the program (invalid user input, database problems, network outages, absent files) * are subclasses of Exception * a method is obliged to establish a policy for all checked exceptions thrown by its implementation (either pass the checked exception further up the stack, or handle it somehow) It is somewhat confusing, but note as well that RuntimeException (unchecked) is itself a subclass of Exception (checked).
Which of these class is related to all the exceptions that can be caught by using catch?
You can catch all exceptions by catching the superclass Exception.try {// Do some wacky stuff} catch (Exception e) {System.out.println("I've gone nuts");e.printStackTrace();}
Describe the JAVA throwable class hierarchy and types of exceptions?
In Java there are two main types of Exceptions. * Checked Exceptions - The ones that can be checked & handled in our code. Ex: I/O Exception, SQL Exception etc. In most cases, the compiler itself forces us to catch & handle these exceptions * Un-checked Exceptions - The ones that we cannot & should not handle in our code. Ex. Null Pointer Exception The java.lang.Throwable is the super class of all errors and exceptions in Java. Only objects of this class can be thrown & caught and handled by try-catch blocks. Ex: try { ..... ..... } catch (Exception e){ ... } finally { ... }
What is meant by error handling support in dot net?
The idiomatic way to express error conditions in .NET framework is by throwing exceptions. In C#, we can handle them using the try-catch-finally statement:try {// code which can throw exceptions}catch{// code executed only if exception was thrown}finally{// code executed whether an exception was thrown or not}Whenever an exception is thrown inside the try block, the execution continues in the catch block. The finallyblock executes after the try block has successfully completed. It also executes when exiting the catch block, either successfully or with an exception.In the catch block, we usually need information about the exception we are handling. To grab it, we use the following syntax:catch (Exception e) {// code can access exception details in variable e}The type used (Exception in our case), specifies which exceptions will be caught by the catch block (all in our case, as Exception is the base type of all exceptions).Any exceptions that are not of the given type or its descendants, will fall through.We can even add multiple catch blocks to a single try block. In this case, the exception will be caught by the first catch block with matching exception type:catch (FileNotFoundException e) {// code will only handle FileNotFoundException}catch (Exception e){// code will handle all the other exceptions}This allows us to handle different types of exceptions in different ways. We can recover from expected exceptions in a very specific way, for example:If a user selected a non-existing or invalid file, we can allow him to select a different file or cancel the action.If a network operation timed out, we can retry it or invite the user to check his network connectivity.For remaining unexpected exceptions, e.g. a NullReferenceExceptions caused by a bug in the code, we can show the user a generic error message, giving him an option to report the error, or log the error automatically without user intervention.
Difference between checked and unchecked exception?
Checked exceptions are exceptions which need to be handled explicitly. These are the ones which require a try-catchblock or a throws keyword.Unchecked exceptions are exceptions which have no obligation to be handled. A NullPointerException is one common example.
What does the word vindicate mean?
Vindicate = to justify To clear of all charges, accusations or blame.
What is defferred exceptional handling?
Deferred exception handling refers to a programming design pattern where individual class level methods do not handle exceptions using try catch blocks. They just cascade the exceptions to the calling methods using the "throw" keyword and all exceptions are handled centrally in one place. This is called deferred exception handling where the exceptions are deferred in the place where they occur and propagated to a parent class which handles it.
Can a try block have more than one catch block?
It can have as many as you want. It allows you to catch very specific exceptions. -- Ac352 Answer Having more than one catch statement is a bad idea. A better approach is to analyze the error and go from their. Here is an example. Try My.Computer.FileSystem.DeleteFile("C:\TEST.txt") Catch ex As Exception If ex.Message.Tostring="C:\TEST.txt Is An Invalid File Location" Then 'Do what you want to do. End If End Try That is the best way just keep adding ElseIf statements to cover all exceptions that you want to find.
Do finalities justify means?
Not in all situations.
Is a fly a vertebrate or invertebrate?
A fly is an invertebrate. All of them. No exceptions.
All Amendments to the US Constitution ARE NOT __ and ALL OF THEM HAVE exceptions?
your right
What is the implication of catching all the exceptions with the type Exception?
though catching exceptions is a good practice inside java code, catching all exceptions of the type exception is not the best way to go. Specific exceptions need to be caught instead of the generic Exception being caught. Also, different types of exceptions need to be handled separately.
Could all minerals be gemstones?
Not all minerals are gemstones; these are exceptions.
