Structure and classification of common exceptions in Java

Throwable (parent Class)
Error awterror ioerror linkageerror threaddeatherror Exception ... (self-built exception) SQLException IOException runtimeexception indexoutofboundexception nullpointerexception

ClassCastException

Uncheked Exception: Exception that will be found after running, including RuntimeException and error

Chicked exception: Refers to the Java Virtual machine can be caught at compile-time exceptions, this exception, eclipse will be an error, except unchecked exceptions are in this category;

Exception Handling method:

Negative handling: Throws thrown, let Java virtual machine handle

Active handling: Use a try. Catch.. Finally. Capture and process