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How is a virtual class implemented in Apex?
To create virtual class, we need to use virtual definition modifier. You can extend a class to provide more sophisticated behaviour. Class that extends another class inherits all the methods and properties of the extended class. Methods declared as virtual can be override.
Can abstract class have virtual method in Apex?
The abstract methods can only be defined in an abstract class, whereas virtual methods can be defined in virtual as well as abstract class.
How many constructors can a class have?
Strictly speaking, the JVM classfile format limits the number of methods (including all constructors) for a class to less than 65536. And according to Tom Hawtin, the effective limit is 65527.
What happens when you extend a class in apex?
You can extend a class to provide more specialized behavior. A class that extends another class inherits all the methods and properties of the extended class. In addition, the extending class can override the existing virtual methods by using the override keyword in the method definition.
Which is an example of an exception in apex?
Example public virtual class MyException extends Exception { // Exception class member // variable public Double d; // Exception class constructor MyException(Double d) { this.d = d; } // Exception class method protected void doIt() { } } ❮ PreviousNext ❯ Privacy Policy Terms of Use
What do you need to know about apex programming?
Introduction to apex programming Apex Class – Simple Class to understand Apex Creating simple Apex trigger Apex coding basics for learners Asynchronous Apex public, private, protected & global keywords in Apex Programming static, final, this, super keywords in apex Class, Abstract, Implements, extends, interface keywords in Apex
Which is an example of extending a class?
This is referred to as polymorphism. A class extends another class using the extends keyword in the class definition. A class can only extend one other class, but it can implement more than one interface. This example shows how the YellowMarker class extends the Marker class.