Lesson: 10 | Inner Classes

In Apex, you can define top-level classes (also called outer classes) as well as inner classes, that is, a class defined within another class. You can only have inner classes one level deep.

Apex Class

public class myOuterClass{
    public  class myInnerClass{
        public void show() {
            System.debug('Hello');
        }
    }
    
}

ApexCode

To call a method of your inner class, use the following code:

myOuterClass.myInnerClass innObj = new myOuterClass.myInnerClass();
innObj.show();

Consideration

Access modifiers:
- You must use one of the access modifiers (such as public or global) in the declaration of a top-level class.
- You do not have to use an access modifier in the declaration of an inner class.
Optional definition modifiers (such as virtual, abstract, and so on)
Required: The keyword class followed by the name of the class
Optional extensions and/or implementations

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A. Apex DML Operations (8 lessons)

B. Apex Classes (17 lessons)

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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)

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Lesson: 10 | Inner Classes

Apex Class

Apex Intermediate