Contents
What is an apex property?
An Apex property is similar to a variable; however, you can do additional things in your code to a property value before it is accessed or returned. The code in a set accessor executes when the property is assigned a new value. …
What are apex setters and getters?
Setter method : This will take the value from the visualforce page and stores to the Apex variable name. getter method : This method will return a value to a visualforce page whenever a name variable is called.
What is an apex transaction?
An Apex transaction represents a set of operations that are executed as a single unit. All DML operations in a transaction either complete successfully, or if an error occurs in one operation, the entire transaction is rolled back and no data is committed to the database.
What is encapsulation in Apex?
Wrapping (or Binding) method and data together into a single unit is known as encapsulation. An Apex class is the example of encapsulation. Apex bean is the fully encapsulated class because all the data members are private here.
What is a constructor apex?
Constructor in Apex Programming is a code that is called when an object is created from the class. Properties of Constructor. Method name should be the same as the Class name. Access specifiers should be defined as public. This method is called automatically when the objects are created.
Why is get set used?
Getters and setters are used to protect your data, particularly when creating classes. For each instance variable, a getter method returns its value while a setter method sets or updates its value. Getters and setters allow control over the values.
What is overloading and overriding in Salesforce?
Salesforce LWC polymorphism can achieve by two ways: Overloading and overriding. If a class have multiple methods by same name but different parameters, it is known as Method Overloading. If we have to perform only one operation, having same name of the methods increases the readability of the program.
What is abstract class in Apex?
An abstract class is something between inheritance and an interface. In inheritance, a child class extends a parent class, where both the classes have full implementations. The coinValue method is declared using the abstract keyword, which means that all child classes need to implement this.
Do you need to define properties in apex?
Properties cannot be defined on interface. Properties provide storage for values directly. You do not need to create supporting members for storing values. It is possible to create automatic properties in Apex. For more information, see Using Automatic Properties. Properties do not require additional code in their get or set accessor code blocks.
How are properties used to validate data in apex?
Properties can be used to validate data before a change is made, to prompt an action when data is changed (such as altering the value of other member variables), or to expose data that is retrieved from some other source (such as another class). The code in a get accessor executes when the property is read.
How does the get accessor work in apex?
The following code segment calls the BasicProperty class, exercising the get and set accessors: The body of the get accessor is similar to that of a method. It must return a value of the property type. Executing the get accessor is the same as reading the value of the variable. The get accessor must end in a return statement.
What are the access modifiers for apex properties?
The access modifiers that can be applied to properties include: public, private, global, and protected. In addition, these definition modifiers can be applied: static and transient. For more information on access modifiers, see Access Modifiers. return_type is the type of the property, such as Integer, Double, sObject, and so on.