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Foil 3 Java Language -- Handling Runtime Errors Using Exceptions

From Jan 29 Delivered Lecture for Course CPS616 -- Java Lecture 3 -- Exceptions Through Events CPS616 spring 1997 -- Jan 29 1997. by Nancy McCracken * See also color IMAGE
Secs 50.4
The language itself supports concept of an exception
Java supports a hierarchical model of exceptions which allow and indeed require user to supply suitable handlers for any exception that can occur in a Java program
Note exceptions that can occur in a method must either be caught (i.e. handled inside method) or thrown (i.e. returned to callee)
Thrown exceptions are like returned arguments and are for instance part of interface to a method
Exceptions are all (at some level in hierarchy) subclasses of Throwable class
Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

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