Java reading notes (1)-Exception handling

2015-12-31

A . Exception handling

2. Exception Overview (exception/error)

3. Exception handling mechanism

   2. Catching exceptions using try{}catch ()

   4. Inheritance system for exception classes ( Small exceptions are handled first , and large exceptions are handled )

   6. Multiple exception captures provided by Java7

   8. Access exception information

   10. Use finally to reclaim resources ( explicitly reclaim physical resources garbage-collected heap memory return System.exit (1))

   12. Nesting of exception handling

   14. java7 Auto-close resource try statement with parentheses )

5. checked exception and runtime exception system

   1. throws declaration throws exception ( method signature )

6. Throw an exception with throw

   2. Throw exception ( business logic decision )

   4. custom exception class ( no parameter constructor single parameter string Constructor single parameter throwable constructors super)

   6. catch and throw are used simultaneously ( layered )

   8. Java7 Enhanced throw statement

   10. Exception chain ( exception translation responsibility chain pattern encapsulates the original exception )

8. Java exception-tracking stack

10. Exception handling mechanism

    1. Do not over-use exceptions ( efficiency )

    2. Do not use an overly large try block

    3. Avoid using catch all statements

    4. Do not ignore the caught exception

Java reading notes (1)-Exception handling