# Class Error

java.lang.Object
java.lang.Throwable
java.lang.Error

All Implemented Interfaces:
  `Serializable`

Direct Known Subclasses:
  `AnnotationFormatError`, `AssertionError`, `AWTError`, `CoderMalfunctionError`, `FactoryConfigurationError`, `FactoryConfigurationError`, `IOError`, `LinkageError`, `SchemaFactoryConfigurationError`, `ServiceConfigurationError`, `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.

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.

See Java Language Specification:
  11.2 Compile-Time Checking of Exceptions
Since:
  1.0
See Also:
  - Serialized Form

- ## Constructor Summary

  Constructors
  Modifier
  Constructor
  Description
  ``
  `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.
  `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.
  ``
  `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`).

- ## Method Summary

  ### Methods declared in class java.lang.Throwable

  `addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString`

  ### Methods declared in class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- ## Constructor Details

  - ### 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

  - ### 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` - 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