SCJP : exception
An Error is a subclass of Throwable that indicates serious problems that a reasonable application should not try to catch. Most such errors are abnormal conditions. The ThreadDeath error, though a "normal" condition, is also a subclass of Error because most applications should not try to catch it.
A method is not required to declare in its throws clause any subclasses of Error that might be thrown during the execution of the method but not caught, since these errors are abnormal conditions that should never occur.
java.lang.Object java.lang.Throwable java.lang.Error
The class Exception and its subclasses are a form of Throwable that indicates conditions that a reasonable application might want to catch.
java.lang.Object java.lang.Throwable java.lang.Exception
RuntimeException is the superclass of those exceptions that can be thrown during the normal operation of the Java Virtual Machine.
A method is not required to declare in its throws clause any subclasses of RuntimeException that might be thrown during the execution of the method but not caught.
java.lang.Object java.lang.Throwable java.lang.Exception java.lang.RuntimeExceptionArrayIndexOutOfBoundsException
Thrown to indicate that an array has been accessed with an illegal index. The index is either negative or greater than or equal to the size of the array.
java.lang.Object java.lang.Throwable java.lang.Exception java.lang.RuntimeException java.lang.IndexOutOfBoundsException java.lang.ArrayIndexOutOfBoundsException
Thrown to indicate that the code has attempted to cast an object to a subclass of which it is not an instance. For example, the following code generates a ClassCastException:
Object x = new Integer(0); System.out.println((String)x);
java.lang.Object java.lang.Throwable java.lang.Exception java.lang.RuntimeException java.lang.ClassCastException
Thrown to indicate that a method has been passed an illegal or inappropriate argument.
java.lang.Object java.lang.Throwable java.lang.Exception java.lang.RuntimeException java.lang.IllegalArgumentException
Signals that a method has been invoked at an illegal or inappropriate time. In other words, the Java environment or Java application is not in an appropriate state for the requested operation.
java.lang.Object java.lang.Throwable java.lang.Exception java.lang.RuntimeException java.lang.IllegalStateException
Thrown when an application attempts to use null in a case where an object is required. These include:
java.lang.Object java.lang.Throwable java.lang.Exception java.lang.RuntimeException java.lang.NullPointerException
Thrown to indicate that the application has attempted to convert a string to one of the numeric types, but that the string does not have the appropriate format.
java.lang.Object java.lang.Throwable java.lang.Exception java.lang.RuntimeException java.lang.IllegalArgumentException java.lang.NumberFormatException
Thrown to indicate that an assertion has failed. The seven one-argument public constructors provided by this class ensure that the assertion error returned by the invocation:
java.lang.Object java.lang.Throwable java.lang.Error java.lang.AssertionError
Signals that an unexpected exception has occurred in a static initializer. An ExceptionInInitializerError is thrown to indicate that an exception occurred during evaluation of a static initializer or the initializer for a static variable.
As of release 1.4, this exception has been retrofitted to conform to the general purpose exception-chaining mechanism. The "saved throwable object" that may be provided at construction time and accessed via the getException() method is now known as the cause, and may be accessed via the Throwable.getCause() method, as well as the aforementioned "legacy method."
java.lang.Object java.lang.Throwable java.lang.Error java.lang.LinkageError java.lang.ExceptionInInitializerError
Thrown when a stack overflow occurs because an application recurses too deeply.
java.lang.Object java.lang.Throwable java.lang.Error java.lang.VirtualMachineError java.lang.StackOverflowError
Thrown if the Java Virtual Machine or a ClassLoader instance tries to load in the definition of a class (as part of a normal method call or as part of creating a new instance using the new expression) and no definition of the class could be found.
The searched-for class definition existed when the currently executing class was compiled, but the definition can no longer be found.
java.lang.Object java.lang.Throwable java.lang.Error java.lang.LinkageError java.lang.NoClassDefFoundError