73. Polymorphism With Classes Example

This video shows an example of polymorphism or dynamic method dispatch in Java. We have a base class called Shape with several subclasses such as Square, Circle, Rectangle, Triangle and they all override the base method getArea() to define how each of their areas are calculated. The main program asks the user to enter the side lengths for a bunch of different shapes and then calculates the minimum, maximum and average area using polymorphism.

Course Cirriculum

Setup Java

• 1. Install Java On Windows 04:31
• 2. Install IntelliJ IDEA On Windows 06:24
• 3. Install Java JDK On Mac 03:05
• 4. Install IntelliJ IDEA On Mac 05:55
• 5. Memory Organization And Data Hierarchy Explained 06:41
• 6. Hello World Explained 02:49
• 7. Hello World Example 06:40
• 8. Steps To Run A Java Program 04:36

Data Types

• 9. Variables And Constants Explained 03:37
• 10. Variables And Constants Example 07:27
• 11. Typecasting Explained 02:09
• 12. Typecasting Example 06:47

Operators

• 13. Arithmetic Operators Explained 02:11
• 14. Arithmetic Operators Example 04:25
• 15. Relational Operators Explained 02:32
• 16. Relational Operators Example 06:11
• 17. Assignment Operators Explained 02:00
• 18. Assignment Operators Example 02:36
• 19. Increment Decrement And Logical Operators Explained 03:40
• 20. Increment Decrement And Logical Operators Example 04:52

Conditional Statements

• 21. If Else Explained 04:16
• 22. If Else Example 05:09
• 23. Ternary Operator Explained 01:01
• 24. Ternary Operator Example 01:31
• 25. Switch Statement Explained 02:05
• 26. Switch Statement Example 05:44

Loops

• 27. For Loop Explained 06:26
• 28. For Loop Example 08:45
• 29. While Loop Explained 04:29
• 30. While Loop Example 04:21
• 31. Do While Explained 02:53
• 32. Do While Example 02:14
• 33. Break Statement Explained 03:02
• 34. Break Statement Example 06:57
• 35. Continue Statement Explained 02:20
• 36. Continue Statement Example 02:44

Strings

• 37. String Explained 11:09
• 38. String Example I 08:10
• 39. String Example II 07:11
• 40. String Builder And String Conversions Explained 06:56
• 41. String Builder And String Conversions Example 06:08

Methods

• 42. Methods Explained 05:09
• 43. Types Of Methods 04:50
• 44. Methods Example 06:02
• 45. Method Overloading And Variable Scope Explained 05:54
• 46. Method Overloading And Variable Scope Example 08:43

Arrays

• 47. Arrays Explained 08:16
• 48. Arrays Example 12:49
• 49. Multidimensional Arrays Explained 03:36
• 50. Multidimensional Arrays Example 07:24

Object Oriented Programming

• 51. Classes And Objects Explained I 06:07
• 52. Classes And Objects Explained II 10:16
• 53. Classes And Objects Example 10:12
• 54. Take Input From User Explained 05:21
• 55. Take Input From User Example 12:36
• 56. ArrayList Explained 08:46
• 57. ArrayList Example 12:06
• 58. Call By Value Vs. Call By Reference Explained 07:19
• 59. Call By Value Vs. Call By Reference Example 02:28
• 60. Constructors And Overloading Explained 06:26
• 61. Constructors And Overloading Example 05:09

Inheritance

• 62. Static Keyword Explained 07:30
• 63. Static Keyword Example 09:47
• 64. Enumeration Explained 07:27
• 65. Enumeration Example 07:33
• 66. This Keyword And Variable Hiding Explained 08:23
• 67. This Keyword And Variable Hiding Example 07:05
• 68. Inheritance Explained 06:23
• 69. Inheritance Example 02:20
• 70. Super Keyword And Method Overriding Explained 08:24
• 71. Super Keyword And Method Overriding Example 11:02
• 72. Polymorphism With Classes Explained 05:05
• 73. Polymorphism With Classes Example 26:13