What are common Java exception types?

QuestionsQuestions8 SkillsProJava Exception HandlingNov, 13 2025
0107

Common Java exception types include:

  1. NullPointerException: Thrown when an application attempts to use null where an object is required.

  2. ArrayIndexOutOfBoundsException: Occurs when trying to access an array with an illegal index (either negative or greater than the array size).

  3. ClassCastException: Thrown when an object is cast to a subclass of which it is not an instance.

  4. ArithmeticException: Occurs when an exceptional arithmetic condition has occurred, such as division by zero.

  5. IOException: A general exception that signals that an I/O operation has failed or been interrupted.

  6. FileNotFoundException: A subclass of IOException, thrown when an attempt to open a file denoted by a specified pathname has failed.

  7. NumberFormatException: Thrown when an attempt to convert a string to a numeric type fails.

  8. IllegalArgumentException: Indicates that a method has been passed an illegal or inappropriate argument.

  9. IndexOutOfBoundsException: Thrown to indicate that an index is out of range for a collection or array.

  10. UnsupportedOperationException: Indicates that the requested operation is not supported.

These exceptions help developers identify and handle specific error conditions in their applications.

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