JAVA PROGRAM • LEVEL 12 — EXCEPTION HANDLING
Create a Custom Exception in Java
Learn create a custom exception in java with a complete, compiler-ready Java 17 example.
PROBLEM UNDERSTANDING
Input and expected output
No input required
Attendance below 75%
COMPLETE JAVA 17 PROGRAM
Complete Java 17 implementation
class AttendanceException extends Exception { AttendanceException(String message){super(message);} }
class Main { static void check(int attendance)throws AttendanceException{if(attendance<75)throw new AttendanceException("Attendance below 75%");} public static void main(String[] args){try{check(60);}catch(AttendanceException error){System.out.println(error.getMessage());}} }CURRENT STEP
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SELECTED LINE
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EXPECTED OUTPUT FOR THE SAMPLE
Attendance below 75%
PROGRAM EXPLANATION
Algorithm and explanation
- Initialize the deterministic sample values used for create a custom exception in java.
- Create the required object and apply Custom exception and Exception inheritance to its state or behavior.
- Print the final result and compare it with the documented sample output.
This Java 17 example demonstrates Custom exception and Exception inheritance 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.