JAVA PROGRAM • LEVEL 10 — INHERITANCE & POLYMORPHISM
Access a Protected Member in Java
Learn access a protected member in java with a complete, compiler-ready Java 17 example.
PROBLEM UNDERSTANDING
Input and expected output
No input required
1100
COMPLETE JAVA 17 PROGRAM
Complete Java 17 implementation
class Account { protected int balance=1000; } class Savings extends Account { void addInterest(){balance+=100;} }
class Main { public static void main(String[] args){Savings savings=new Savings();savings.addInterest();System.out.println(savings.balance);} }CURRENT STEP
Select Start to walk through the important lines.
SELECTED LINE
No line selected
EXPECTED OUTPUT FOR THE SAMPLE
1100
PROGRAM EXPLANATION
Algorithm and explanation
- Initialize the deterministic sample values used for access a protected member in java.
- Create the required object and apply protected and Subclass access to its state or behavior.
- Print the final result and compare it with the documented sample output.
This Java 17 example demonstrates protected and Subclass access through a complete, executable program. The values are intentionally small so students can trace each statement, verify the output, and then modify the example safely in the online compiler.
EFFICIENCY
Time and space complexity
O(1)
O(1)
DEBUGGING CHECKLIST
Common mistakes
Keep the class name Main and the entry method signature public static void main(String[] args) when using the online compiler.
Create an object before accessing instance members; static members can be accessed through the class name.
Java is case-sensitive, and every statement that requires a semicolon must end with one.