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Java

774The Throwable Class: Root of All Exceptions and Errors
775Error vs Exception: Two Branches of Throwable
776When to Catch Error: Almost Never
777Exception as the Base for Application Problems
778Throwable Methods: getMessage, printStackTrace, and getCause
779Chained Exceptions and initCause
780getStackTrace and Stack Trace Elements
781Suppressed Exceptions in Throwable
782VirtualMachineError and LinkageError: System-Level Errors
783The Two Categories: Checked and Unchecked Exceptions
784What Makes an Exception Checked?
785What Makes an Exception Unchecked?
786The throws Clause: Declaring Checked Exceptions
787Compile-Time Enforcement of Checked Exceptions
788Why Unchecked Exceptions Don't Require Declaration
789When to Use Checked Exceptions: Recoverable Conditions
790When to Use Unchecked Exceptions: Programming Errors
791The Controversy: Checked Exceptions Debate
792Overriding Methods and Exception Compatibility
793Understanding RuntimeException and Unchecked Exceptions
794NullPointerException: The Most Common Runtime Error
795ArrayIndexOutOfBoundsException and Bounds Checking
796IndexOutOfBoundsException in Collections
797IllegalArgumentException: Validating Method Parameters
798IllegalStateException: Detecting Invalid Object States
799ClassCastException and Type Safety
800NumberFormatException: String to Number Conversion Failures
801ArithmeticException: Division by Zero and Integer Overflow
802UnsupportedOperationException in Collections
803When to Use RuntimeException vs Checked Exceptions
804Introduction to Checked Exceptions
805IOException: File and Stream Operations
806SQLException: Database Access Errors
807ClassNotFoundException and NoClassDefFoundError
808InterruptedException: Thread Interruption
809ParseException: Data Parsing Failures
810CloneNotSupportedException: Cloning Restrictions
811ReflectiveOperationException Hierarchy
812Choosing Between Checked and Unchecked
813When to Create Custom Exceptions
814Extending Exception for Checked Exceptions
815Extending RuntimeException for Unchecked Exceptions
816Constructors: Message, Cause, and Both
817Adding Custom Fields and Methods
818Exception Naming Conventions
819Exception Hierarchies for Related Errors
820Overriding getMessage for Custom Formatting
821Best Practices: Avoiding Exception Overuse

Java

774The Throwable Class: Root of All Exceptions and Errors
775Error vs Exception: Two Branches of Throwable
776When to Catch Error: Almost Never
777Exception as the Base for Application Problems
778Throwable Methods: getMessage, printStackTrace, and getCause
779Chained Exceptions and initCause
780getStackTrace and Stack Trace Elements
781Suppressed Exceptions in Throwable
782VirtualMachineError and LinkageError: System-Level Errors
783The Two Categories: Checked and Unchecked Exceptions
784What Makes an Exception Checked?
785What Makes an Exception Unchecked?
786The throws Clause: Declaring Checked Exceptions
787Compile-Time Enforcement of Checked Exceptions
788Why Unchecked Exceptions Don't Require Declaration
789When to Use Checked Exceptions: Recoverable Conditions
790When to Use Unchecked Exceptions: Programming Errors
791The Controversy: Checked Exceptions Debate
792Overriding Methods and Exception Compatibility
793Understanding RuntimeException and Unchecked Exceptions
794NullPointerException: The Most Common Runtime Error
795ArrayIndexOutOfBoundsException and Bounds Checking
796IndexOutOfBoundsException in Collections
797IllegalArgumentException: Validating Method Parameters
798IllegalStateException: Detecting Invalid Object States
799ClassCastException and Type Safety
800NumberFormatException: String to Number Conversion Failures
801ArithmeticException: Division by Zero and Integer Overflow
802UnsupportedOperationException in Collections
803When to Use RuntimeException vs Checked Exceptions
804Introduction to Checked Exceptions
805IOException: File and Stream Operations
806SQLException: Database Access Errors
807ClassNotFoundException and NoClassDefFoundError
808InterruptedException: Thread Interruption
809ParseException: Data Parsing Failures
810CloneNotSupportedException: Cloning Restrictions
811ReflectiveOperationException Hierarchy
812Choosing Between Checked and Unchecked
813When to Create Custom Exceptions
814Extending Exception for Checked Exceptions
815Extending RuntimeException for Unchecked Exceptions
816Constructors: Message, Cause, and Both
817Adding Custom Fields and Methods
818Exception Naming Conventions
819Exception Hierarchies for Related Errors
820Overriding getMessage for Custom Formatting
821Best Practices: Avoiding Exception Overuse

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Lesson 798 of 2,870·19. Exception Hierarchy and Custom ExceptionsPro lesson

IllegalStateException: Detecting Invalid Object States

Understand when objects are in invalid states and how IllegalStateException signals this.

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