Java ErrorsLesson 47Free preview

Java Multiple Exceptions

This lesson is part of Java · All levels

Summary

One try block may be accompanied by several catch blocks to handle different types of exceptions. Since Java 7, we can also capture several exceptions at once in a block with a separator. The key is to write catch blocks from the most specific to the most common.

Key points

One try can have many catch, each for a different type of exception.
Multi-catch: catch (IOException) SQLException e catches two types in one block
The catch sequence must be from a (specific) derivative class to a (common) parent class, otherwise the compiler rejects
The variable exception on multi-catch is final so it cannot be reassigned
The block catch exception at the end becomes a safety net for unexpected error

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