What Is A Derived Trait Apex, A derived trait in Apex is a characteristic of a class that is inherited from another class. In, General, what-is-a-derived-trait-apex, JPOSE
A derived trait in Apex is a characteristic of a class that is inherited from another class. In object-oriented programming, inheritance is the concept of creating a new class from an existing class. The new class, called the derived class, inherits all the properties and methods of the existing class, called the base class.
When a derived class inherits a trait from a base class, it can modify the behavior of the trait or add new behavior to it. This allows developers to reuse code and avoid duplicating functionality in their programs.
For example, suppose we have a base class called Animal that has a trait called speak(). The speak() trait produces a sound that the animal makes, such as a bark for a dog or a meow for a cat.
Now suppose we create a derived class called Dog that inherits from Animal. The Dog class can use the speak() trait inherited from Animal, but it can also modify the behavior of the trait to produce a specific bark sound for a dog.
In Apex, inheritance is achieved using the extends keyword. The derived class specifies the base class that it inherits from using the extends keyword. For example, the Dog class would be defined as follows:
public class Dog extends Animal {
// additional code for the Dog class
}
In this example, the Dog class extends the Animal class, which means it inherits all the traits of the Animal class.
In conclusion, a derived trait is a characteristic of a class that is inherited from another class. It allows developers to reuse code and modify behavior in their programs. Apex supports inheritance using the extends keyword.