Apex Intermediate Progress | ( Lessons)

Lesson: 141 | Constructor

Notes
Video

Notes

In Apex, a constructor is a special method within a class that is used for initializing the object's state. Constructors are called when an object of a class is created. They allow you to perform any necessary setup or initialization logic for the object.

Here are some key points about constructors in Apex:

Default Constructor: If you don't define a constructor, Apex provides a default constructor with no parameters and no logic.

public class MyClass {
    public String name;
    public MyClass() {
        name = 'John Smith';
        System.debug(name);
    }
}

Execute this code in Anonymous Window

MyClass objA = new MyClass();

Output: John Smith

Parameterized Constructor: You can create constructors with parameters to initialize the object with specific values.

public class MyClass {
    public String name;
    public MyClass(String n) {
        name = n;
        System.debug(name);
    }
}

Execute this code in Anonymous Window

MyClass objA = new MyClass('Emma Whatson');

Output: Emma Whatson

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Apex Intermediate

A. Apex DML Operations (8 lessons)

B. Apex Classes (17 lessons)

C. Apex Triggers (9 lessons)

D. Apex Exceptions (11 lessons)

E. Asynchronous Apex (6 lessons)

F. SOSL (10 lessons)

G. Testing Apex (9 lessons)

H. Apex Fast Recap (142 lessons)

I. Build Apex Coding Skills (64 lessons)

J. Miscellaneous (17 lessons)

You need to complete all the quizzes before certification.

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Lesson: 141 | Constructor

Notes

Apex Intermediate