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Author

CHecked Exception

Sandy Lee
Greenhorn

Joined: Jan 18, 2001
Posts: 18
In very simple terms, checked exception are a subset of the exceptions that are checked by the compiler and flagged(code will not compile) if they are not handled by the method
1. either in a try catch block or
2. not propogated by that method by declaring the method as throws SomeChecked excpetion.
Of the Exception class, there is the RunTimeException subclass and its sub classes and there are other subclasses.The RuntimeException and its subclasses are not checked exceptions.

The other exceptions include IOException and its subclasses for e.g.
A simpler way to remember is that all Exception other than
1. Exception class.
2. RuntimeException and its subclasses
are checked exception.
Trust this helps.
Jeff Sky
Greenhorn

Joined: Feb 15, 2001
Posts: 9

Except for RuntimeException, Error and their subclass, all exceptions are called checked exceptions.
the compiler ensures that if a a method can throw a checked exception , derectly or indirectly, the the method must explicitly deal with it.
the method must either cathch the cxeption and take the appropriate acton, or pass on the exception to its caller.
------------------
Jeff


Jeff
Swati Jambhale
Greenhorn

Joined: Jan 26, 2001
Posts: 22
hello
I wanted to know, if we are calling a finalize() method ,why we have to catch the Throwable exception or we have to mention that it throws this exception
i.e
public static void main(String s[]) throws Throwable
{
new Object().finalize();
}
why we have to include a throws clause or we have to catch this exception.
Is Throwable/Exception is consider as a Checked Exceptions ?

public void fun()
{
// code not throwing any IOExceptions
}
catch(IOException e)
{}
this code will cause an compile time error. as IOException is checked exception.
public void fun()
{
//code not throwing any kind of exception
}
catch(Exception e)
{}
This is compile and run perfectly
Is there is some rule which i am missing

 
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