Java 6 Illuminated: An Active Learning Approach, 2nd Edition

11.9 Chapter Summary 797

CHAPTER SUMMARY

11.9 Chapter Summary

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Java provides exception classes so that unexpected, illegal opera-

tions at run time can be trapped and handled. This provides the

programmer with a tool to keep the program running instead of

terminating.

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When calling a constructor or method that throws a checked

exception, you must use try and catch blocks; otherwise, the code

will not compile.

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For calls to a constructor or method that throws an unchecked

exception, try and catch blocks are optional. If try and catch blocks

are not used, the exception will be caught at run time by the Java

Virtual Machine.

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When a try block assigns a value ...