Class RuntimeException
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.
Since: 1.0 See Also:
-
Constructor Summary
ConstructorsModifierConstructorDescriptionConstructs a new runtime exception with null as its detail message.RuntimeException(String message)Constructs a new runtime exception with the specified detail message.Constructs a new runtime exception with the specified detail message and cause.protectedRuntimeException(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.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). -
Method Summary
Methods declared in class Throwable
addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toStringModifier and TypeMethodDescriptionfinal voidaddSuppressed(Throwable exception)Appends the specified exception to the exceptions that were suppressed in order to deliver this exception.Fills in the execution stack trace.getCause()Returns the cause of this throwable or null if the cause is nonexistent or unknown.Creates a localized description of this throwable.Returns the detail message string of this throwable.Provides programmatic access to the stack trace information printed by Throwable.printStackTrace().final Throwable[]Returns an array containing all of the exceptions that were suppressed, typically by the try-with-resources statement, in order to deliver this exception.Initializes the cause of this throwable to the specified value.voidPrints this throwable and its backtrace to the standard error stream.voidPrints this throwable and its backtrace to the specified print stream.voidPrints this throwable and its backtrace to the specified print writer.voidsetStackTrace(StackTraceElement[] stackTrace)Sets the stack trace elements that will be returned by Throwable.getStackTrace() and printed by Throwable.printStackTrace() and related methods.toString()Returns a short description of this throwable.Methods declared in class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, waitModifier and TypeMethodDescriptionprotected Objectclone()Creates and returns a copy of this object.booleanIndicates whether some other object is "equal to" this one.protected voidfinalize()Deprecated, for removal: This API element is subject to removal in a future version.Finalization is deprecated and subject to removal in a future release.final Class<?>getClass()Returns the runtime class of this Object.inthashCode()Returns a hash code value for this object.final voidnotify()Wakes up a single thread that is waiting on this object's monitor.final voidWakes up all threads that are waiting on this object's monitor.final voidwait()Causes the current thread to wait until it is awakened, typically by being notified or interrupted.final voidwait(long timeoutMillis)Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.final voidwait(long timeoutMillis, int nanos)Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
-
Constructor Details
-
RuntimeException
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). -
RuntimeException
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. -
RuntimeException
Constructs a new runtime exception with the specified detail message and cause.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.) Since: 1.4Note that the detail message associated with cause is not automatically incorporated in this runtime exception's detail message.
-
RuntimeException
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.) Since: 1.4 -
RuntimeException
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 Since: 1.7
-
Report a bug or suggest an enhancement
For further API reference and developer documentation see the Java SE Documentation, which contains more detailed, developer-targeted descriptions with conceptual overviews, definitions of terms, workarounds, and working code examples. Other versions.
Java is a trademark or registered trademark of Oracle and/or its affiliates in the US and other countries.
Copyright © 1993, 2026, Oracle and/or its affiliates, 500 Oracle Parkway, Redwood Shores, CA 94065 USA.
All rights reserved. Use is subject to license terms and the documentation redistribution policy.