Exception handling -checked exception and unchecked exception

Abnormal Root Class is Throwable, Throwable derive the Error and Exception.

Java 8 API Doc in the description of the checked exception and unchecked exception of:

1. checked exception :( described Exception class)

The class Exception and any subclasses that are not also subclasses of RuntimeException are checked exceptions. 

 

2. unchecked exception：

(Description of the Error class)

 Error and its subclasses are regarded as unchecked exceptions for the purposes of compile-time checking of exceptions

(Described RuntimeException class)

RuntimeException and its subclasses are unchecked exceptions. 

 

3. checked exception: Compiler their required display captured or throw, e.g., IOException, SQLException;

unchecked exception: generally occurs at runtime, the compiler is not required to be captured or displayed thrown, e.g. NullPointerException, ClassCastException;

 

RuntimeException and its subclasses are unchecked exceptions.