Java 19-10 Implementation and testing of custom exceptions

1 /*2 * Java cannot be considered for all exceptions, so in real development we may need to define our own exceptions. 3 * and our own arbitrary write a class, is not as an exception class, to think of your class is an exception class, you must inherit from exception or RuntimeException4  * 5 * Two types of methods:6 * A: Inherited exception compile-time exception7 * B: Inherited runtimeexception Run-time exception8  */9  Public classMyExceptionextendsException {Ten     //non-parametric construction One      Publicmyexception () { A     } -     //with parametric construction -      Publicmyexception (String message) { the         Super(message);//call the method of the parent class throwable so that the specific cause of the exception can be indicated when an exception occurs -     } - } -  + //Public class MyException extends RuntimeException { - // + // }

1  Public classTeacher {2      Public voidCheckintScore)throwsMyException {3         if(Score > | | Score < 0) {4             Throw NewMyException ("score must be between 0-100");5}Else {6System.out.println ("Score No Problem");7         }    8}

Test class:

1 ImportJava.util.Scanner;2 3 /*4 * Custom Exception test class5  */6  Public classStudentdemo {7      Public Static voidMain (string[] args) {8Scanner sc =NewScanner (system.in);9System.out.println ("Please enter student results:");Ten         intScore =sc.nextint (); One  ATeacher T =NewTeacher (); -         Try { - T.check (score); the}Catch(MyException e) { - e.printstacktrace (); -         } -     } +}

Java 19-10 Implementation and testing of custom exceptions