- An exception is an event, which occurs during the execution of a program, which disrupts the normal flow of the program's instructions.
- Exceptions are represented by instances of the class java.lang.Exception and its subclasses.
- An exception indicates an unusual condition or an error condition.
- Program control becomes unconditionally transferred or "thrown" to a specially designated section of code where it's caught and handled.
- The list of methods called is known as the call stack.
- After a method throws an exception, the runtime system attempts to find something to handle it.
What Is Unchecked exception?
- Since these exceptions are generally none-recoverable - they cannot usually be handled by the program.
- error : exceptional conditions that are external to the application.
- runtime exception : exceptional conditions that are internal to the application.
- These exceptions do not have to be included in a methodâ€™s throws list or caught.
- The compiler does not check to see if the methods handles this type of error.
What Is Checked exception?
- These are exceptional conditions that a well-written application should anticipate and recover from.
- Checked exceptions are subject to the Catch or Specify Requirement.
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