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. Getting Started
    13m 6s
  2. How to use LearnVern
    3m 20s

  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
    13m 50s
  5. Understanding Android Studio Interface
    12m 53s
  6. Importing and Creating Projects in Android - Part 1
    14m
  7. Importing and Creating Projects in Android - Part 2
    20m 47s
  8. Android Architecture - Linux Kernel
    15m 30s
  9. Android Architecture - Android Libraries
    17m 25s
  10. Android Architecture - Android Runtime and Applications
    14m 31s
  11. Application Components in Android- Part 1
    8m 15s
  12. Application Components in Android - Part 2
    16m 38s
  13. Additional Components in Android
    8m 56s
  14. Assignment : Android Fundamentals
    2m 30s

  1. Introduction to JAVA for Android
    6m 2s
  2. Why JAVA is more Preferred for Android
    23m 30s
  3. JAVA OOPS Concepts - Encapsulation,Abstraction
    20m 37s
  4. JAVA OOPS Concepts - Inheritance, Polymorphism
    14m 32s
  5. JAVA Constructor
    18m 59s
  6. JAVA Classes
    13m 55s
  7. JAVA Object
    8m 59s
  8. JAVA Classes and Objects Demo Application
    50m 29s
  9. Assignment : JAVA Programming Basics
    1m

  1. Creating First Project Demo Part-1
    14m 47s
  2. Android Life Cycle
    22m 37s
  3. Android Life Cycle Practical
    27m 4s
  4. Your First Project Demo Part -2
    29m 35s
  5. Android Resources
    16m 44s
  6. Android - Resources Directory
    14m 57s
  7. Demo Application in Android
    29m 17s
  8. Introduction to Android Service
    18m 22s
  9. Android Service Life Cycle
    17m 42s
  10. Service Demo Practical
    34m 48s
  11. Creating Broadcast Receivers in Android
    27m 9s
  12. Registering Broadcast Receivers in Android
    16m 20s
  13. Broadcast Receivers Practical in Android
    27m 9s
  14. Content Provider Implementation in Android
    15m 55s
  15. Creating Content URI & Description in Android
    12m 43s
  16. Content Providers in Android - Part 1
    12m 30s
  17. Content Providers in Android - Part 2
    12m 59s
  18. Content Providers in Android - Part 3
    38m 15s
  19. Fragments Overview in Android
    17m 10s
  20. Fragments Life Cycle in Android
    15m
  21. Fragments Method to Override in Android
    18m 1s
  22. Single Frame Fragment Demo in Android
    27m 59s
  23. Android List Frame Fragment Demo
    27m 14s
  24. Android Transaction Frame Fragment
    27m 33s
  25. Intents and Filters in Android
    24m 12s
  26. Intents Method and Objects in Android
    26m 6s
  27. Intents Category in Android
    16m 19s
  28. Types of Intents in Android
    27m 40s
  29. Intent Filters in Android
    25m 12s
  30. Intents and Intent Filters in Android Demo - 1
    35m 54s
  31. Intents and Intent Filters in Android Demo - 2
    31m 50s
  32. Intent Standard Actions in Android Part - 1
    19m 10s
  33. Intent Standard Actions in Android Part - 2
    7m 55s
  34. Intent Standard Action in Android Part - 3
    15m 34s
  35. Intent Standard Action in Android Part - 4
    13m
  36. Intent Standard Action in Android Part - 5
    12m 55s
  37. Intent Standard Categories in Android Part - 1
    18m 49s
  38. Intent Standard Categories in Android Part - 2
    19m 20s
  39. Intent Standard Extra Data in Android Part - 1
    17m 55s
  40. Intent Standard Extra Data in Android Part - 2
    7m 41s
  41. Assignment : Android Application Components
    1m 15s

  1. Introduction to Android - User Interface Overview
    12m 20s
  2. User Interface Layout in Android Part - 1
    12m 55s
  3. User Interface Layout in Android Part - 2
    20m 35s
  4. UI Linear Layout in Android
    11m 54s
  5. UI Linear Layout in Android Demo
    31m 36s
  6. UI Relative Layout in Android Part - 1
    22m 47s
  7. UI Relative Layout in Android Part - 2
    10m 44s
  8. UI Relative Layout in Android Demo
    31m 57s
  9. UI Table Layout in Android
    14m 30s
  10. UI Table Layout in Android Demo
    25m 55s
  11. UI Absolute Layout in Android
    18m 19s
  12. UI Absolute Layout in Android Demo
    27m 43s
  13. UI Frame Layout in Android
    10m 14s
  14. UI Frame Layout in Android Demo
    14m 22s
  15. UI List View using Adapter in Android
    21m 36s
  16. ListView Attributes and Array Adapter in Android
    8m 38s
  17. UI List View in Android Demo
    16m 17s
  18. UI Grid View in Android
    17m 36s
  19. UI Grid View in Android Demo
    30m 40s
  20. Assignment : Android UI and Widgets
    1m 14s

  1. UI TextView control in Android
    21m 27s
  2. UI Text View Control Attribute in Android Part - 1
    14m 39s
  3. UI Text View Control Attribute in Android Part - 2
    9m 31s
  4. UI TextView Control in Android Demo
    17m 45s
  5. UI EditText Control in Android
    9m 35s
  6. UI EditText Control in Android Demo
    12m 38s
  7. UI AutoComplete TextView Control in Android
    8m 41s
  8. UI AutoComplete TextView Control Practical in Android
    17m 26s
  9. UI Button Control in Android
    6m 41s
  10. UI Button Control in Android Demo
    15m 50s
  11. UI ImageButton Control in Android
    12m 25s
  12. UI ImageButton Control in Android demo
    19m 10s
  13. UI CheckBox Control in Android
    10m 36s
  14. UI CheckBox Control in Android Demo Part - 1
    14m
  15. UI CheckBox Control in Android Demo Part - 2
    38m 36s
  16. UI Toggle Button Control in Android
    5m 13s
  17. UI Toggle Button Control Practical in Android
    15m 12s
  18. UI Radio Button Control in Android
    5m 9s
  19. UI Radio Button Control Practical in Android
    21m 41s
  20. UI Radio Group Control in Android
    16m 46s
  21. UI Progress Bar Control in Android
    11m 57s
  22. UI Progress Bar Control Practical in Android
    26m 29s
  23. UI Spinner Control in Android
    3m 35s
  24. UI Spinner Control Practical in Android
    25m 23s
  25. UI TimePicker Control in Android
    8m 27s
  26. UI TimePicker Control Practical in Android
    19m 14s
  27. UI DatePicker Control in Android
    13m 28s
  28. UI DatePicker Contro Practical in Android
    21m 18s
  29. Assignment : Android UI control and Components
    1m 34s

  1. Basics of Event Handling, Event Listeners and Event Handlers in Android
    17m 29s
  2. Anrdoid Event Handler Methods
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  3. Event Listener Registration in Android
    7m 37s
  4. Styles and Themes in Android
    14m
  5. Assignment : Event Handling in Android
    58s

  1. Course Summary
    12m 18s

  1. Interview Questions
    20m 23s

  1. Career Guideline
    6m
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