Stay organized with collections Save and categorize content based on your preferences.
Error
public class Error
extends Throwable
Known direct subclasses AnnotationFormatError, AssertionError, AssertionFailedError, CoderMalfunctionError, FactoryConfigurationError, IOError, LinkageError, ServiceConfigurationError, ThreadDeath, TransformerFactoryConfigurationError, VirtualMachineError |
Known indirect subclasses AbstractMethodError, BootstrapMethodError, ClassCircularityError, ClassFormatError, ComparisonFailure, ExceptionInInitializerError, GenericSignatureFormatError, IllegalAccessError, IncompatibleClassChangeError, InstantiationError, InternalError, NoClassDefFoundError, NoSuchFieldError, NoSuchMethodError, OutOfMemoryError, and 6 others. AbstractMethodError | Thrown when an application tries to call an abstract method. | BootstrapMethodError | Thrown to indicate that an invokedynamic instruction or a dynamic constant failed to resolve its bootstrap method and arguments, or for invokedynamic instruction the bootstrap method has failed to provide a call site with a target of the correct method type, or for a dynamic constant the bootstrap method has failed to provide a constant value of the required type. | ClassCircularityError | Thrown when the Java Virtual Machine detects a circularity in the superclass hierarchy of a class being loaded. | ClassFormatError | Thrown when the Java Virtual Machine attempts to read a class file and determines that the file is malformed or otherwise cannot be interpreted as a class file. | ComparisonFailure | This class was deprecated in API level 16. use org.junit.ComparisonFailure | ExceptionInInitializerError | Signals that an unexpected exception has occurred in a static initializer. | GenericSignatureFormatError | Thrown when a syntactically malformed signature attribute is encountered by a reflective method that needs to interpret the generic signature information for a type, method or constructor. | IllegalAccessError | Thrown if an application attempts to access or modify a field, or to call a method that it does not have access to. | IncompatibleClassChangeError | Thrown when an incompatible class change has occurred to some class definition. | InstantiationError | Thrown when an application tries to use the Java new construct to instantiate an abstract class or an interface. | InternalError | Thrown to indicate some unexpected internal error has occurred in the Java Virtual Machine. | NoClassDefFoundError | 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. | NoSuchFieldError | Thrown if an application tries to access or modify a specified field of an object, and that object no longer has that field. | NoSuchMethodError | Thrown if an application tries to call a specified method of a class (either static or instance), and that class no longer has a definition of that method. | OutOfMemoryError | Thrown when the Java Virtual Machine cannot allocate an object because it is out of memory, and no more memory could be made available by the garbage collector. | StackOverflowError | Thrown when a stack overflow occurs because an application recurses too deeply. | UnknownError | Thrown when an unknown but serious exception has occurred in the Java Virtual Machine. | UnsatisfiedLinkError | Thrown if the Java Virtual Machine cannot find an appropriate native-language definition of a method declared native . | UnsupportedClassVersionError | Thrown when the Java Virtual Machine attempts to read a class file and determines that the major and minor version numbers in the file are not supported. | VerifyError | Thrown when the "verifier" detects that a class file, though well formed, contains some sort of internal inconsistency or security problem. | ZipError | Signals that an unrecoverable error has occurred. | |
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. That is, Error
and its subclasses are regarded as unchecked exceptions for the purposes of compile-time checking of exceptions.
Summary
Public constructors |
Error() Constructs a new error with null as its detail message. |
Error(String message) Constructs a new error with the specified detail message. |
Error(String message, Throwable cause) Constructs a new error with the specified detail message and cause. |
Error(Throwable cause) Constructs a new error 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 constructors |
Error(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) Constructs a new error with the specified detail message, cause, suppression enabled or disabled, and writable stack trace enabled or disabled. |
Inherited methods |
|
From class java.lang.Object Object | clone() Creates and returns a copy of this object. | boolean | equals(Object obj) Indicates whether some other object is "equal to" this one. | void | finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. | final Class<?> | getClass() Returns the runtime class of this Object . | int | hashCode() Returns a hash code value for the object. | final void | notify() Wakes up a single thread that is waiting on this object's monitor. | final void | notifyAll() Wakes up all threads that are waiting on this object's monitor. | String | toString() Returns a string representation of the object. | final void | wait(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. | final void | wait(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 void | wait() Causes the current thread to wait until it is awakened, typically by being notified or interrupted. | |
Public constructors
Error
public Error ()
Constructs a new error with null
as its detail message. The cause is not initialized, and may subsequently be initialized by a call to Throwable.initCause(Throwable)
.
Error
public Error (String message)
Constructs a new error with the specified detail message. The cause is not initialized, and may subsequently be initialized by a call to Throwable.initCause(Throwable)
.
Parameters |
message | String : the detail message. The detail message is saved for later retrieval by the Throwable.getMessage() method. |
Error
public Error (String message, Throwable cause)
Constructs a new error with the specified detail message and cause.
Note that the detail message associated with cause
is not automatically incorporated in this error's detail message.
Parameters |
message | String : the detail message (which is saved for later retrieval by the Throwable.getMessage() method). |
cause | Throwable : 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.) |
Error
public Error (Throwable cause)
Constructs a new error 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 errors that are little more than wrappers for other throwables.
Parameters |
cause | Throwable : 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
Error
protected Error (String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace)
Constructs a new error with the specified detail message, cause, suppression enabled or disabled, and writable stack trace enabled or disabled.
Parameters |
message | String : the detail message. |
cause | Throwable : the cause. (A null value is permitted, and indicates that the cause is nonexistent or unknown.) |
enableSuppression | boolean : whether or not suppression is enabled or disabled |
writableStackTrace | boolean : whether or not the stack trace should be writable |
Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
Last updated 2025-02-10 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-02-10 UTC."],[],[]]