Android Development For Beginners > JAVA Programming Basics

JAVA Constructor

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When an object is created in Java, a function Object() { [native code] } is a particular method that is invoked. To put it another way, whenever you utilise the new term. A Java constructor's job is to initialise a newly formed object before it can be utilised. The function Object() { [native code] } of a Java class creates instances (objects) of that class.

  • Java constructors are used to initialize an object with the default values. There are several types of Java constructors, but the most common ones are default, parameterized, and copy. The default constructor is used to initialize an object with the default values. It doesn't have any parameters.
  • The parameterized constructor is used to initialize an object with a set of parameters. The parameters can be passed by calling the constructor or by assigning them in a class definition. The copy constructor is used to make a deep copy of an object by copying all its fields and properties.

The difference between static and non-static Java constructors is that the former is called before the object has been created whereas the latter is called after. Static constructors are used to initialize class members and perform other tasks that need to be completed before an object can be created. Non-static constructors are used to initialize instance variables and perform other tasks that need to be completed after an object has been created.

Java is a popular programming language that has been around for over two decades. It is used to develop Android apps, games, and websites. Java is an object-oriented programming language that uses the concept of objects and classes. Java also has a feature called “constructors” which are used to create instances of the class. Constructors are methods in java which are invoked when an object is created or instantiated. They are important because they help in creating instances of the class, they can be used for initialization purposes, and they can also be overridden by subclasses so as to provide customizations for different types of objects.

A JAVA constructor is a programmer who specializes in the Java programming language and the Java Virtual Machine. They are responsible for developing and implementing JAVA-based applications and software. An Android developer is a programmer who specializes in the Android operating system. They are responsible for developing, testing, and debugging Android apps.

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  1. Introduction to Android
    10m 40s
  2. Android Features and APP Categories
    18m 29s
  3. Android Studio Installation
    8m 57s
  4. Android Studio Environment Setup
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  5. Understanding Android Studio Interface
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  6. Importing and Creating Projects in Android - Part 1
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  7. Importing and Creating Projects in Android - Part 2
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  8. Android Architecture - Linux Kernel
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  9. Android Architecture - Android Libraries
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  10. Android Architecture - Android Runtime and Applications
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  11. Application Components in Android- Part 1
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  12. Application Components in Android - Part 2
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  13. Additional Components in Android
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  14. Assignment : Android Fundamentals
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  1. Introduction to JAVA for Android
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  2. Why JAVA is more Preferred for Android
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  3. JAVA OOPS Concepts - Encapsulation,Abstraction
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  4. JAVA OOPS Concepts - Inheritance, Polymorphism
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  5. JAVA Constructor
    18m 59s
  6. JAVA Classes
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  7. JAVA Object
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  8. JAVA Classes and Objects Demo Application
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  9. Assignment : JAVA Programming Basics
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  1. Creating First Project Demo Part-1
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  2. Android Life Cycle
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  3. Android Life Cycle Practical
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  4. Your First Project Demo Part -2
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  5. Android Resources
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  6. Android - Resources Directory
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  7. Demo Application in Android
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  8. Introduction to Android Service
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  9. Android Service Life Cycle
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  10. Service Demo Practical
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  11. Creating Broadcast Receivers in Android
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  12. Registering Broadcast Receivers in Android
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  13. Broadcast Receivers Practical in Android
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  15. Creating Content URI & Description in Android
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  16. Content Providers in Android - Part 1
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  17. Content Providers in Android - Part 2
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  18. Content Providers in Android - Part 3
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  19. Fragments Overview in Android
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  20. Fragments Life Cycle in Android
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  21. Fragments Method to Override in Android
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  22. Single Frame Fragment Demo in Android
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  24. Android Transaction Frame Fragment
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  25. Intents and Filters in Android
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  26. Intents Method and Objects in Android
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  27. Intents Category in Android
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  28. Types of Intents in Android
    27m 40s
  29. Intent Filters in Android
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  30. Intents and Intent Filters in Android Demo - 1
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  31. Intents and Intent Filters in Android Demo - 2
    31m 50s
  32. Intent Standard Actions in Android Part - 1
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  33. Intent Standard Actions in Android Part - 2
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  34. Intent Standard Action in Android Part - 3
    15m 34s
  35. Intent Standard Action in Android Part - 4
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  36. Intent Standard Action in Android Part - 5
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  37. Intent Standard Categories in Android Part - 1
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  38. Intent Standard Categories in Android Part - 2
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  39. Intent Standard Extra Data in Android Part - 1
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  40. Intent Standard Extra Data in Android Part - 2
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  41. Assignment : Android Application Components
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  1. Introduction to Android - User Interface Overview
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  2. User Interface Layout in Android Part - 1
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  3. User Interface Layout in Android Part - 2
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  5. UI Linear Layout in Android Demo
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  6. UI Relative Layout in Android Part - 1
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  7. UI Relative Layout in Android Part - 2
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  8. UI Relative Layout in Android Demo
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  10. UI Table Layout in Android Demo
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  12. UI Absolute Layout in Android Demo
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  14. UI Frame Layout in Android Demo
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  17. UI List View in Android Demo
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  18. UI Grid View in Android
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  19. UI Grid View in Android Demo
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  20. Assignment : Android UI and Widgets
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  1. UI TextView control in Android
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  2. UI Text View Control Attribute in Android Part - 1
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  3. UI Text View Control Attribute in Android Part - 2
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  4. UI TextView Control in Android Demo
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  5. UI EditText Control in Android
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  6. UI EditText Control in Android Demo
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  7. UI AutoComplete TextView Control in Android
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  8. UI AutoComplete TextView Control Practical in Android
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  9. UI Button Control in Android
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  10. UI Button Control in Android Demo
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  12. UI ImageButton Control in Android demo
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  13. UI CheckBox Control in Android
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  14. UI CheckBox Control in Android Demo Part - 1
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  15. UI CheckBox Control in Android Demo Part - 2
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  17. UI Toggle Button Control Practical in Android
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  18. UI Radio Button Control in Android
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  26. UI TimePicker Control Practical in Android
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  27. UI DatePicker Control in Android
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  28. UI DatePicker Contro Practical in Android
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  1. Course Summary
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  1. Interview Questions
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  1. Career Guideline
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