How do I use exceptions in Apex?

How do I use exceptions in Apex?

You can’t throw built-in Apex exceptions. You can only catch them. But with custom exceptions, you can throw and catch them in your methods. Custom exceptions enable you to specify detailed error messages and have more custom error handling in your catch blocks.

What is Apex try?

In apex, exceptions are used to note errors and other events that have disrupted the normal flow of code execution. The try statement identifies the block of code that an exception may occur in. The catch statement identifies a block of code that can handle a particular type of exception.

How do I log exception in Apex?

Use that exception class in your code.

1. Create Custom Object : Let us create new custom object in our salesforce application. Custom object name and fields details are as below image.
2. Create Apex class for Exception. We have to create apex class which will extend Exception class.
3. Use that exception class in your code.

What is exception handling in Salesforce?

Exception Handling is a mechanism in salesforce to handle unwanted exceptions or errors in our code without the exception breaking the flow of the code. This is a practice which allows the developers to handle any exceptions in their code, which allows them to account for any errors in the system.

How is exception handling done in Salesforce apex?

Exception handling is done in apex by using the try and catch mechanism, basically any code which can throw an exception is enclosed in a try block and each try block is followed by a catch block which is entered if the try block throws an exception. Exception occurs during the run time / execution of a program.

What is an example of an apex error?

In our example, we will have an employee relocation screen by department where we will use the APEX_ERROR package in a system-defined and another user-defined exception. The system-defined exception, which is defined and maintained implicitly by the Oracle Database and which we will cover in our example, is the NO_DATA_FOUND.

When to call the finally block in apex?

Apex also supports the finally block which is always called regardless of whether an exception has occurred. Finally is usually used to do some cleanup of resources. system.debug (‘Uh oh an error occurred!’); Never just catch Exception, instead catch the specific type of exceptions.

What is the catch block in Salesforce apex?

Catch: Each catch block is an exception handler that handles the type of exception indicated by its argument. The argument type, ExceptionType , declares the type of exception that the handler can handle and must be the name of a class that inherits from the Throwable class. The handler can refer to the exception with name.