How to Create a Derived Class in Java

See Java: Tips and Tricks for similar articles.

A derived class is a Java class that inherits properties from its super class. For example, an Employee class might be derived from a Person class. Therefore the Employee class could inherit first name and last name properties from Person, its super class. The following eight steps show how to write a derived class in Java.

  1. Open your text editor and type in the following Java statements:Java Source for Super ClassThe program defines one property: fullName. This property will contain first name and last name. Notice that the program follows the Javabean specification for defining a property, i.e., a private variable with getter and setter methods.
  2. Save your file as
  3. Open a command prompt and navigate to the directory containing your Java program. Then type in the command to compile the source and hit Enter.Compile Source for Super Class
  4. Create a new file in your text editor. Type in the following Java statements:Java Source for Derived ClassThe Employee class defines one property: empId. This property will contain the employee ID. Notice that the constructor calls the constructor in the super class (Person). The full name parameter is passed to the constructor.
  5. Save your file as
  6. Return to the command prompt, then type in the command to compile the source and hit Enter.Compile Source for Derived Class
  7. Create an application to test your derived class. Create a new file in your text editor and type in the following Java statements:Java Source for Tester ClassThe program instantiates an Employee object and then calls the getFullName method. This method is located in the Person class. The method can be called from the Employee object, verifying that derived classes inherit super class methods.
  8. You will now test your program. Type in the command to run the Java runtime launcher and hit Enter. Notice the output of the program verifies that a method in the super class can be called using the derived class.Run Tester for Derived Class

Related Articles

  1. How to Check Object Type in Java
  2. How to Create a Jar File in Java
  3. How to Compile Packages in Java
  4. How to Throw an Exception in Java
  5. How to Create an Exception Class in Java
  6. How to Use the super Keyword to Call a Base Class Constructor in Java
  7. How to Use the Comparator.comparing Method in Java 8
  8. How to Use in Java
  9. How to Call an Interface Method in Java
  10. How to Add a Time Zone in the Java 8 Date/Time API
  11. How to Rethrow an Exception in Java
  12. How to Use the instanceof Operator with a Generic Class in Java
  13. How to Instantiate an Object in Java
  14. How to Filter Distinct Elements from a Collection in Java 8
  15. How to Create a Derived Class in Java (this article)
  16. How to Skip Elements with the Skip Method in Java 8
  17. How to Create a Java Bean
  18. How to Implement an Interface in Java
  19. How to Compare Two Objects with the equals Method in Java
  20. How to Set PATH from JAVA_HOME
  21. How to Prevent Race Conditions in Java 8
  22. How to Write a Block of Code in Java
  23. How to Display the Contents of a Directory in Java
  24. How to Group and Partition Collectors in Java 8
  25. How to Create a Reference to an Object in Java
  26. How to Reduce the Size of the Stream with the Limit Method in Java 8
  27. How to Write an Arithmetic Expression in Java
  28. How to Format Date and Time in the Java 8 Date/Time API
  29. How to Use Comparable and Comparator in Java
  30. How to Break a Loop in Java
  31. How to Use the this Keyword to Call Another Constructor in Java
  32. How to Write a Unit Test in Java
  33. How to Declare Variables in Java
  34. How to Override Base Class Methods with Derived Class Methods in Java
  35. How to Use Serialized Objects in Java
  36. How to Write Comments in Java
  37. How to Implement Functional Interfaces in Java 8
  38. How to Write Type Parameters with Multiple Bounds in Java
  39. How to Add Type and Repeating Annotations to Code in Java 8
  40. How to Use Basic Generics Syntax in Java
  41. How to Map Elements Using the Map Method in Java 8
  42. How to Work with Properties in Java
  43. How to Write while and do while Loops in Java
  44. How to Use the finally Block in Java
  45. How to Write for-each Loops in Java
  46. How to Create a Method in Java
  47. How to Continue a Loop in Java
  48. How to Handle Java Files with Streams
  49. How to Create an Interface Definition in Java
  50. How Default Base Class Constructors Are Used with Inheritance