Java General Java Exception handling Tutorial

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Tutorial: Java General Java Exception handling Tutorial

Exceptions are Java objects; exception classes are derived from java.lang.Throwable.

Tutorial Details:

Java Exception handling

An exception is thrown to denote an abnormal occurrence like accessing an array index that exceeds the size of the array. Exceptions can be checked or unchecked. Subclasses of RuntimeException and Error are called unchecked exceptions. All other classes, which inherit from Exception, are checked exceptions.

Any method that might throw a checked exception must either declare the exception using the throws keyword (see Java keywords and identifiers for more information on keywords) or handle the exception using a try/catch block.

The code that might throw an exception is enclosed in the try block. One or more catch clauses can be provided to handle different exception types

The finally block can also be provided to perform any cleanup operation. If an exception is thrown, any matching catch clauses are executed, then control comes to the finally block, if one is provided.

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