This chapter examines Java’s exception-handling mechanism. An exception is an abnormal condition that arises in a code sequence at run time. In other words, an exception is a run-time error. In computer languages that do not support exception handling, errors must be checked and handled manually—typically through the use of error codes, and so on. This approach is as cumbersome as it is troublesome. Java’s exception handling avoids these problems and, in the process, brings run-time error management into the object-oriented world.
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