Exception handling syntax: Difference between revisions

Revision as of 05:41, 20 January 2025

Revision as of 06:10, 20 January 2025

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}

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If multiple resources are acquired, the correct way to deal with them is with nested try blocks.<ref>Bloch, Joshua (2018). ''Effective Java, Third Edition''. Addison-Wesley. Item 9, p. 54. {{ISBN|978-0-13-468599-1}}</ref> For this reason and others, ''try-with-resources'' was added to the language to almost entirely replace finally clauses. Resources acquired in a parentheses after the try keyword will be cleaned up automatically. Classes used in these statements must implement an interface called AutoCloseable.<ref>https://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html</ref>

A try statement may be followed with statements in a parenthesis. Resources acquired in these statements will be cleaned up automatically instead of in a finally block. Classes used in these statements must implement an interface called AutoCloseable.<ref>https://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html</ref>

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try (FileReader fr = new FileReader(path);

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} catch (IOException ioe) {

// Deal with exception.

} // File and stream in the try statement are automatically closed afterwards.

finally {

// A finally block can be included here as well, and will run after the resources in the try statements are closed.

}

// File and stream in the try statement are automatically closed afterwards.

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