Basic HTML version of Foils prepared Sept 21 1998

Foil 45 Java Language -- Handling Runtime Errors Using Exceptions

From Java Tutorial 98- 2: Java Language and Object Oriented Techniques NAVO Tutorial -- Sept 23 1998. by Geoffrey C. Fox, Nancy McCracken
1 The language itself supports concept of an exception
2 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
3 Note exceptions that can occur in a method must either be caught (i.e. handled inside method) or thrown (i.e. returned to callee)
4 Thrown exceptions are like returned arguments and are for instance part of interface to a method
5 Exceptions are all (at some level in hierarchy) subclasses of Throwable class
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