Checked, UnChecked Exception

Checked Exception

Definition

These are exceptions that are checked at compile-time by the Java compiler.
The programmer is required to handle these exceptions explicitly, either by using a try-catch block or by declaring them in the method signature with the throws keyword.

컴파일러에 의해 컴파일시점에 확인되며, 프로그램 내에서 예외처리를 필요로함

예시)

• IOException
• SQLException
• FileNotFoundException

usecase

Checked exceptions are typically used for situations where the program can recover, such as when dealing with file handling, database access, or network operations.

프로그램내 어떤프로세스에서 원복이 가능할 때 고려

UnChecked Exception

Definition

These are exHandling these exceptions is optional. The programmer may or may not catch them. Handling these exceptions is optional. The programmer may or may not catch them.

컴파일시점이 아닌, 런타임시점에 확인가능한 예외
예외처리는 필수가 아닌 선택사항
예시)

• NullPointerException
• ArrayIndexOutOfBoundsException
• ArithmeticException