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## java.lang
Class Error

    java.lang.Object
      |
      +--java.lang.Throwable
            |
            +--java.lang.Error

All Implemented Interfaces:
  Serializable

Direct Known Subclasses:
  AssertionError, AWTError, CoderMalfunctionError, FactoryConfigurationError, LinkageError, ThreadDeath, TransformerFactoryConfigurationError, VirtualMachineError

public class Error
extends Throwable

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.

Since:
  JDK1.0
See Also:
  `ThreadDeath`, Serialized Form

Constructor Summary
`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`).

Methods inherited from class java.lang.Throwable
`fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### 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(java.lang.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(java.lang.Throwable)`.

Parameters:
  `message` - 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` - 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:
  1.4

### 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` - 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

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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.