exception java

The IllegalArgumentException class is derived from the RuntimeException class, and is therefore

An unchecked exception class

System error = error thrown by

JVM

____ is an abstract class that all the other character stream-reading classes are derived from.

Reader

unchecked exception

Runtime exceptions and error

Exception classes is three main categories

System errors, excpetions, rt exception

Every method must state the type of checked exceptions it might throw

T

If a method does not handle a possible exception, what must the method have?

A throws clause in its header

Detecting of an error is in .... and handling of an error is done in..

Called method, calling method

Throws to.. and throw to..

Declare an exception,throw an excpetion

A(n) ____ is an object that is generated in memory as the result of an error or an unexpected event.

Exception

All of the exceptions that you will handle are instances of classes that are derived from

Exception

Exception is an instance of

Exception class java.lang.ArithmeticException ex

A(n) ____ is a section of code that gracefully responds to exceptions when they are thrown.

Exception handler

True/False A catch clause that uses a parameter variable of the Exception type is capable of catching any exception that is derived from the Error class.

F

True/False The throws clause causes an exception to be thrown.

False,

Classes that are derived from the Error class are

For exceptions that are thrown when a critical error occurs, and the application program should not try to handle them

The following catch statement can catch (Exception e) {...}

Handle all exceptions by using polymorphic reference as a parameter in the catch clause

If, within one try statement you want to have catch clauses of the following types, in which order should they appear in your program:

IllegalArgumentException/RuntimeException/Exception/Throwable

When an exception is thrown,

It must be handled by the program or by the default exception handler

System.out.println(e.getMessage());

It prints the default error message for an exception

True/False The call stack is an internal list of all the methods that are currently executing.

T

True/False When the code in a try block may throw more than one type of exception, you need to write a catch clause for each type of exception that could potentially be thrown.

T

Unchecked exceptions are those that inherit from

The Error class or the RuntimeException class

checked exception

The compiler forces the programmer to check and deal with them in try-catch

If the program does not handle an exception,

The program is halted and the default exception handler handles the exception

In a try/catch construct, after the catch statement is executed

The program resumes at the statement that immediately follows the try/catch construct

True/False When an exception is thrown by a method that is executing under several layers of method calls, a stack trace indicates the method executing when an exception occurred and all of the methods that were called in order go execute that method.

True

If the code in a method can potentially throw a checked exception, then that method must

handle the exception/has a throw clause in header of the method

The root class for excpetions

java.lang.Throwable