RuntimeException

public class RuntimeException extends Exception

Known Direct Subclasses AnnotationTypeMismatchException, ArithmeticException, ArrayStoreException, BufferOverflowException, BufferUnderflowException, ClassCastException, CompletionException, ConcurrentModificationException, DOMException, DateTimeException, EmptyStackException, EnumConstantNotPresentException, FileSystemAlreadyExistsException, FileSystemNotFoundException, IllegalArgumentException, and 19 others. AnnotationTypeMismatchException Thrown to indicate that a program has attempted to access an element of an annotation whose type has changed after the annotation was compiled (or serialized).  ArithmeticException Thrown when an exceptional arithmetic condition has occurred.  ArrayStoreException Thrown to indicate that an attempt has been made to store the wrong type of object into an array of objects.  BufferOverflowException Unchecked exception thrown when a relative put operation reaches the target buffer's limit.  BufferUnderflowException Unchecked exception thrown when a relative get operation reaches the source buffer's limit.  ClassCastException Thrown to indicate that the code has attempted to cast an object to a subclass of which it is not an instance.  CompletionException Exception thrown when an error or other exception is encountered in the course of completing a result or task.  ConcurrentModificationException This exception may be thrown by methods that have detected concurrent modification of an object when such modification is not permissible.  DOMException DOM operations only raise exceptions in "exceptional" circumstances, i.e., when an operation is impossible to perform (either for logical reasons, because data is lost, or because the implementation has become unstable).  DateTimeException Exception used to indicate a problem while calculating a date-time.  EmptyStackException Thrown by methods in the Stack class to indicate that the stack is empty.  EnumConstantNotPresentException Thrown when an application tries to access an enum constant by name and the enum type contains no constant with the specified name.  FileSystemAlreadyExistsException Runtime exception thrown when an attempt is made to create a file system that already exists.  FileSystemNotFoundException Runtime exception thrown when a file system cannot be found.  IllegalArgumentException Thrown to indicate that a method has been passed an illegal or inappropriate argument.  IllegalMonitorStateException Thrown to indicate that a thread has attempted to wait on an object's monitor or to notify other threads waiting on an object's monitor without owning the specified monitor.  IllegalStateException Signals that a method has been invoked at an illegal or inappropriate time.  IllformedLocaleException Thrown by methods in Locale and Locale.Builder to indicate that an argument is not a well-formed BCP 47 tag.  IncompleteAnnotationException Thrown to indicate that a program has attempted to access an element of an annotation type that was added to the annotation type definition after the annotation was compiled (or serialized).  IndexOutOfBoundsException Thrown to indicate that an index of some sort (such as to an array, to a string, or to a vector) is out of range.  LSException Parser or write operations may throw an LSException if the processing is stopped.  MalformedParameterizedTypeException Thrown when a semantically malformed parameterized type is encountered by a reflective method that needs to instantiate it.  MissingResourceException Signals that a resource is missing.  NegativeArraySizeException Thrown if an application tries to create an array with negative size.  NoSuchElementException Thrown by various accessor methods to indicate that the element being requested does not exist.  NullPointerException Thrown when an application attempts to use null in a case where an object is required.  ProviderException A runtime exception for Provider exceptions (such as misconfiguration errors or unrecoverable internal errors), which may be subclassed by Providers to throw specialized, provider-specific runtime errors.  ProviderNotFoundException Runtime exception thrown when a provider of the required type cannot be found.  RejectedExecutionException Exception thrown by an Executor when a task cannot be accepted for execution.  SecurityException Thrown by the security manager to indicate a security violation.  TypeNotPresentException Thrown when an application tries to access a type using a string representing the type's name, but no definition for the type with the specified name can be found.  UncheckedIOException Wraps an IOException with an unchecked exception.  UndeclaredThrowableException Thrown by a method invocation on a proxy instance if its invocation handler's invoke method throws a checked exception (a Throwable that is not assignable to RuntimeException or Error) that is not assignable to any of the exception types declared in the throws clause of the method that was invoked on the proxy instance and dispatched to the invocation handler.  UnsupportedOperationException Thrown to indicate that the requested operation is not supported.

Known Indirect Subclasses AcceptPendingException, AccessControlException, AlreadyBoundException, AlreadyConnectedException, ArrayIndexOutOfBoundsException, CancellationException, CancelledKeyException, ClosedDirectoryStreamException, ClosedFileSystemException, ClosedSelectorException, ClosedWatchServiceException, ConnectionPendingException, DateTimeParseException, DirectoryIteratorException, DuplicateFormatFlagsException, and 41 others. AcceptPendingException Unchecked exception thrown when an attempt is made to initiate an accept operation on a channel and a previous accept operation has not completed.  AccessControlException This exception is thrown by the AccessController to indicate that a requested access (to a critical system resource such as the file system or the network) is denied.  AlreadyBoundException Unchecked exception thrown when an attempt is made to bind the socket a network oriented channel that is already bound.  AlreadyConnectedException Unchecked exception thrown when an attempt is made to connect a SocketChannel that is already connected.  ArrayIndexOutOfBoundsException Thrown to indicate that an array has been accessed with an illegal index.  CancellationException Exception indicating that the result of a value-producing task, such as a FutureTask, cannot be retrieved because the task was cancelled.  CancelledKeyException Unchecked exception thrown when an attempt is made to use a selection key that is no longer valid.  ClosedDirectoryStreamException Unchecked exception thrown when an attempt is made to invoke an operation on a directory stream that is closed.  ClosedFileSystemException Unchecked exception thrown when an attempt is made to invoke an operation on a file and the file system is closed.  ClosedSelectorException Unchecked exception thrown when an attempt is made to invoke an I/O operation upon a closed selector.  ClosedWatchServiceException Unchecked exception thrown when an attempt is made to invoke an operation on a watch service that is closed.  ConnectionPendingException Unchecked exception thrown when an attempt is made to connect a SocketChannel for which a non-blocking connection operation is already in progress.  DateTimeParseException An exception thrown when an error occurs during parsing.  DirectoryIteratorException Runtime exception thrown if an I/O error is encountered when iterating over the entries in a directory.  DuplicateFormatFlagsException Unchecked exception thrown when duplicate flags are provided in the format specifier.  FormatFlagsConversionMismatchException Unchecked exception thrown when a conversion and flag are incompatible.  FormatterClosedException Unchecked exception thrown when the formatter has been closed.  IllegalBlockingModeException Unchecked exception thrown when a blocking-mode-specific operation is invoked upon a channel in the incorrect blocking mode.  IllegalChannelGroupException Unchecked exception thrown when an attempt is made to open a channel in a group that was not created by the same provider.  IllegalCharsetNameException Unchecked exception thrown when a string that is not a legal charset name is used as such.  IllegalFormatCodePointException Unchecked exception thrown when a character with an invalid Unicode code point as defined by Character.isValidCodePoint(int) is passed to the Formatter.  IllegalFormatConversionException Unchecked exception thrown when the argument corresponding to the format specifier is of an incompatible type.  IllegalFormatException Unchecked exception thrown when a format string contains an illegal syntax or a format specifier that is incompatible with the given arguments.  IllegalFormatFlagsException Unchecked exception thrown when an illegal combination flags is given.  IllegalFormatPrecisionException Unchecked exception thrown when the precision is a negative value other than -1, the conversion does not support a precision, or the value is otherwise unsupported.  IllegalFormatWidthException Unchecked exception thrown when the format width is a negative value other than -1 or is otherwise unsupported.  IllegalSelectorException Unchecked exception thrown when an attempt is made to register a channel with a selector that was not created by the provider that created the channel.  IllegalThreadStateException Thrown to indicate that a thread is not in an appropriate state for the requested operation.  InputMismatchException Thrown by a Scanner to indicate that the token retrieved does not match the pattern for the expected type, or that the token is out of range for the expected type.  InvalidMarkException Unchecked exception thrown when an attempt is made to reset a buffer when its mark is not defined.  InvalidParameterException This exception, designed for use by the JCA/JCE engine classes, is thrown when an invalid parameter is passed to a method.  InvalidPathException Unchecked exception thrown when path string cannot be converted into a Path because the path string contains invalid characters, or the path string is invalid for other file system specific reasons.  MissingFormatArgumentException Unchecked exception thrown when there is a format specifier which does not have a corresponding argument or if an argument index refers to an argument that does not exist.  MissingFormatWidthException Unchecked exception thrown when the format width is required.  NoConnectionPendingException Unchecked exception thrown when the finishConnect method of a SocketChannel is invoked without first successfully invoking its connect method.  NonReadableChannelException Unchecked exception thrown when an attempt is made to read from a channel that was not originally opened for reading.  NonWritableChannelException Unchecked exception thrown when an attempt is made to write to a channel that was not originally opened for writing.  NotYetBoundException Unchecked exception thrown when an attempt is made to invoke an I/O operation upon a server socket channel that is not yet bound.  NotYetConnectedException Unchecked exception thrown when an attempt is made to invoke an I/O operation upon a socket channel that is not yet connected.  NumberFormatException 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.  OverlappingFileLockException Unchecked exception thrown when an attempt is made to acquire a lock on a region of a file that overlaps a region already locked by the same Java virtual machine, or when another thread is already waiting to lock an overlapping region of the same file.  PatternSyntaxException Unchecked exception thrown to indicate a syntax error in a regular-expression pattern.  ProviderMismatchException Unchecked exception thrown when an attempt is made to invoke a method on an object created by one file system provider with a parameter created by a different file system provider.  ReadOnlyBufferException Unchecked exception thrown when a content-mutation method such as put or compact is invoked upon a read-only buffer.  ReadOnlyFileSystemException Unchecked exception thrown when an attempt is made to update an object associated with a read-only FileSystem.  ReadPendingException Unchecked exception thrown when an attempt is made to read from an asynchronous socket channel and a previous read has not completed.  ShutdownChannelGroupException Unchecked exception thrown when an attempt is made to construct a channel in a group that is shutdown or the completion handler for an I/O operation cannot be invoked because the channel group has terminated.  StringIndexOutOfBoundsException Thrown by String methods to indicate that an index is either negative or greater than the size of the string.  UnknownFormatConversionException Unchecked exception thrown when an unknown conversion is given.  UnknownFormatFlagsException Unchecked exception thrown when an unknown flag is given.  UnresolvedAddressException Unchecked exception thrown when an attempt is made to invoke a network operation upon an unresolved socket address.  UnsupportedAddressTypeException Unchecked exception thrown when an attempt is made to bind or connect to a socket address of a type that is not supported.  UnsupportedCharsetException Unchecked exception thrown when no support is available for a requested charset.  UnsupportedTemporalTypeException UnsupportedTemporalTypeException indicates that a ChronoField or ChronoUnit is not supported for a Temporal class.  WritePendingException Unchecked exception thrown when an attempt is made to write to an asynchronous socket channel and a previous write has not completed.  ZoneRulesException Thrown to indicate a problem with time-zone configuration.

RuntimeException is the superclass of those exceptions that can be thrown during the normal operation of the Java Virtual Machine.

RuntimeException and its subclasses are unchecked exceptions. Unchecked exceptions do not need to be declared in a method or constructor's throws clause if they can be thrown by the execution of the method or constructor and propagate outside the method or constructor boundary.

Public Constructor Summary

	RuntimeException() Constructs a new runtime exception with null as its detail message.
	RuntimeException(String message) Constructs a new runtime exception with the specified detail message.
	RuntimeException(String message, Throwable cause) Constructs a new runtime exception with the specified detail message and cause.
	RuntimeException(Throwable cause) Constructs a new runtime exception with the specified cause and a detail message of (cause==null ? null : cause.toString()) (which typically contains the class and detail message of cause).

Protected Constructor Summary

RuntimeException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) Constructs a new runtime exception with the specified detail message, cause, suppression enabled or disabled, and writable stack trace enabled or disabled.

Inherited Method Summary

From class java.lang.Throwable

synchronized final void	addSuppressed(Throwable exception) Appends the specified exception to the exceptions that were suppressed in order to deliver this exception.
synchronized Throwable	fillInStackTrace() Fills in the execution stack trace.
synchronized Throwable	getCause() Returns the cause of this throwable or null if the cause is nonexistent or unknown.
String	getLocalizedMessage() Creates a localized description of this throwable.
String	getMessage() Returns the detail message string of this throwable.
StackTraceElement[]	getStackTrace() Provides programmatic access to the stack trace information printed by printStackTrace().
synchronized final Throwable[]	getSuppressed() Returns an array containing all of the exceptions that were suppressed, typically by the try-with-resources statement, in order to deliver this exception.
synchronized Throwable	initCause(Throwable cause) Initializes the cause of this throwable to the specified value.
void	printStackTrace() Prints this throwable and its backtrace to the standard error stream.
void	printStackTrace(PrintWriter s) Prints this throwable and its backtrace to the specified print writer.
void	printStackTrace(PrintStream s) Prints this throwable and its backtrace to the specified print stream.
void	setStackTrace(StackTraceElement[] stackTrace) Sets the stack trace elements that will be returned by getStackTrace() and printed by printStackTrace() and related methods.
String	toString() Returns a short description of this throwable.

From class java.lang.Object

Object	clone() Creates and returns a copy of this Object.
boolean	equals(Object obj) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of Class that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait(long timeout, int nanos) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait(long timeout) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait() Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.

Public Constructors

public RuntimeException ()

Constructs a new runtime exception with null as its detail message. The cause is not initialized, and may subsequently be initialized by a call to Throwable.initCause(Throwable).

public RuntimeException (String message)

Constructs a new runtime exception with the specified detail message. The cause is not initialized, and may subsequently be initialized by a call to Throwable.initCause(Throwable).

Parameters

message	the detail message. The detail message is saved for later retrieval by the Throwable.getMessage() method.

public RuntimeException (String message, Throwable cause)

Constructs a new runtime exception with the specified detail message and cause.

Note that the detail message associated with cause is not automatically incorporated in this runtime exception's detail message.

Parameters

message	the detail message (which is saved for later retrieval by the Throwable.getMessage() method).
cause	the cause (which is saved for later retrieval by the Throwable.getCause() method). (A null value is permitted, and indicates that the cause is nonexistent or unknown.)

public RuntimeException (Throwable cause)

Constructs a new runtime exception with the specified cause and a detail message of (cause==null ? null : cause.toString()) (which typically contains the class and detail message of cause). This constructor is useful for runtime exceptions that are little more than wrappers for other throwables.

Parameters

cause	the cause (which is saved for later retrieval by the Throwable.getCause() method). (A null value is permitted, and indicates that the cause is nonexistent or unknown.)

Protected Constructors

protected RuntimeException (String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace)

Constructs a new runtime exception with the specified detail message, cause, suppression enabled or disabled, and writable stack trace enabled or disabled.

Parameters

message	the detail message.
cause	the cause. (A null value is permitted, and indicates that the cause is nonexistent or unknown.)
enableSuppression	whether or not suppression is enabled or disabled
writableStackTrace	whether or not the stack trace should be writable