The 'this' Keyword in Apex and Visualforce Controllers

C.

The this keyword is used to represent the current instance of a class. It is a reference to the object on which a method or attribute is being called. In other words, this refers to the current object that is being worked with.

In object-oriented programming, a class is a blueprint for creating objects. When an object is created from a class, it is an instance of that class. Each instance has its own set of attributes and methods, which are defined by the class.

The this keyword is used inside a method or constructor of a class to refer to the current instance of the class. This allows you to access the attributes and methods of the current instance. For example, if you have a class Person with an attribute name, you can use this.name to refer to the name attribute of the current instance.

Here is an example of using the this keyword in Java:

vbnetCopy code
public class Person {   private String name;      public Person(String name) {     this.name = name; // using "this" to refer to the current instance's "name" attribute   }      public String getName() {     return this.name; // using "this" to refer to the current instance's "name" attribute   } } 

In the example above, the Person class has a constructor that takes a name parameter and sets the name attribute of the current instance using this.name = name;. The class also has a getName method that returns the name attribute of the current instance using return this.name;.

In summary, the this keyword is used to refer to the current instance of a class and allows you to access its attributes and methods.