Java Handling Exceptions Summary

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title: "Java Handling Exceptions Summary" date: "2024-08-06" excerpt: "Core exception-handling notes covering constructors, checked vs unchecked exceptions, and try-with-resources behavior."

tags: "java,exceptions,error-handling" source: "https://shrikant-havale.in/2024/08/06/java-exception-handling/"

A concise summary of Java exception handling fundamentals.

Exception Constructors

Exception supports multiple constructor signatures including:

• no-arg
• message-only
• cause-only
• message + cause
• advanced constructor with suppression and writable stack trace flags

AutoCloseable

• AutoCloseable defines close().
• Overridden close() may throw narrower/no exceptions.
• In try-with-resources, resources close in reverse declaration order.
• If both try block and close throw exceptions, close exceptions are suppressed.

Try-with-Resources

• Supports multiple resources.
• Variables in resource list must be final or effectively final.

Checked vs Unchecked

• RuntimeException and subclasses are unchecked.
• IOException is checked.
• Custom exceptions extending Exception are checked unless extending RuntimeException.

Catching Broad Types

• Catching Throwable or Error is generally discouraged in application code.

Source

Original post: https://shrikant-havale.in/2024/08/06/java-exception-handling/