月: 2025年4月

Using the super Keyword

The super keyword can be used by classes that are extended from virtual or abstract classes. By using super, you can override constructors and methods from the parent class.

parent class:

public virtual class SuperClass {
    public String mySalutation;
    public String myFirstName;
    public String myLastName;

    public SuperClass() {

        mySalutation = 'Mr.';
        myFirstName = 'Carl';
        myLastName = 'Vonderburg';
    }

    public SuperClass(String salutation, String firstName, String lastName) {

        mySalutation = salutation;
        myFirstName = firstName;
        myLastName = lastName;
    }

    public virtual void printName() {

        System.debug('My name is ' + mySalutation + myLastName);
    }

   public virtual String getFirstName() {
       return myFirstName;
   }
}

extended class :

public class Subclass extends Superclass {
  public override void printName() {
        super.printName();
        System.debug('But you can call me ' + super.getFirstName());
    }
}

extended result:

The expected output when calling Subclass.printName is My name is Mr. Vonderburg. But you can call me Carl.