Real Android App Dev in 15 Hours | KotlinDevX Certificate 2023
Learn Kotlin and develop android applications from 0 to Hero. Start your Android App Development career now and be Pro !
What you'll learn
- Mastering Kotlin
- Kotlin Fundamentals
- Android Studio UI Training
- Android SDK's
- Developing Android Apps
- Motion Layout
- MVVM Principles
- UI Design
- UX Design
- Android App Development
- Android Services
- Explicit Intents
- Android UI Widgets
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course Description :
- *Earn the Official Certificate after Completing the Course
- Even though Kotlin is a full-fledged functional programming language, it preserves most of the object-oriented nature of Java as an alternative programming style, which is very handy when converting existing Java code. Kotlin has classes with constructors, along with nested, inner, and anonymous inner classes, and it has interfaces like Java 8. Kotlin does not have a new keyword. To create a class instance, call the constructor just like a regular function. We saw that in the screenshot above.
- Kotlin has single inheritance from a named superclass, and all Kotlin classes have a default superclass Any, which is not the same as the Java base class java.lang.Object. Any contains only three predefined member functions: equals(), hashCode(), and toString().
- Kotlin classes have to be marked with the open keyword in order to allow other classes to inherit from them; Java classes are kind of the opposite, as they are inheritable unless marked with the final keyword. To override a superclass method, the method itself must be marked open, and the subclass method must be marked override. This is all of a piece with Kotlin’s philosophy of making things explicit rather than relying on defaults. In this particular case, I can see where Kotlin’s way of explicitly marking base class members as open for inheritance and derived class members as overrides avoids several kinds of common Java errors.