Basics of method overriding in Java

Method Overriding in JAVA



  • The process of changing the body of the methods inherited from the parent class to the child class is called method override. For a method to be overridden, the class must be inherited. 



    

  • As we said earlier, in order to override, both the parent and child classes must have methods with the same name. When a class is inherited, the child class automatically inherits the contents of the parent class.
  • After that, two methods will be created in the child class with the same name(the inherited method and the overridden method).



  • When the method is overridden, usually only the method of the child class is executed. The method of the inherited class will never be run.
  • If we need to run parent class method in child class, we have another concept for it. Lets see about it in next blog.





Comments

Post a Comment

Popular posts from this blog

අද අපි කතා කරමු Data collections ගැන

Image
 අද අපි කතා කරමු Data collections ගැන. Data Collections ගැන කතා කරන්න කලින් අපි කතා කරමු Data Arrays ගැන. Data Array එකක් කියන්නෙ එකම වර්ගයේ Data අනුපිළිවෙලකට ගබඩා කරන්න පුලුවන් දාත්ත ව්‍යූහයක්(Data Structure). Array එකේ Type එක String නම් ඒකෙ තියෙන්න පුලුවන් String Data විතරයි. Array එකක් නිර්මාණය කරද්දි ඒකට අදාලව Fixed Size එකක් දෙන්න ඕනි. Array එකක් හැදුවට පස්සෙ අපට Array එක වෙනස් කරන්න බෑ. ex:-  int[] array = new int[5];         array[0] = 1;                 array[1] = 2;                 array[2] = 3;                 array[3] = 4;                 array[4] = 5; එතකොට මොනාද මේ Array වල තියෙන ප්‍රශ්න?      මම මුලින් කිව්වා වගේ Array එකක් හදනකොට අපි ඒකට Fixed Size එකක් දෙන්න ඕනි. දැන් ඔයාලා හිතන්නකො අපි Size එක 5ක් වෙන Array එකක් හදනවා integer වලින්. එතකොට අපිට ඒ Array එකට ඇඩ් කර...
Read more

Understanding and Mastering Coding Errors

Image
 Understanding and Mastering Coding Errors      Coding errors are an inevitable part of the software development journey. Whether you're a novice programmer or a seasoned developer, encountering errors is something you can count on. But rather than seeing them as roadblocks, errors can be powerful learning tools that help you write better code.      There are 3 main types of errors.                     1.Syntax Errors 2.Logical Errors 3.Runtime Errors 1.Syntax Errors:-      Syntax errors occur when the code violates the rules of the programming language. These errors are usually detected by the compiler during the initial stages of program execution. Common examples include missing semicolons, mismatched parentheses, or misspelled keywords.               Above code, semicolon is missed. That is a syntax error. If there any syntax er...
Read more

OOP key points

Image
Key Points Of Object Oriented Programming (OOP) Object Oriented Programming:- It is a computer programming model based on object. We can use it in various programming languages to develop a program.  Building Blocks of OOP Object:-             Object can be define as data field that has unique attributes and behaviors.              Objects can correspond to real-world objects or an abstract entity.      2.Class:-              Class  is a sketch used to implement an object at the programming level.               And also we an define class as "A template that can keep the things what we need".   3.Method:-                A method in OOP is a block of code that, when called, performs specific actions mentioned in it.    4.Variable:- ...
Read more