Package org.eclipse.swt

Class SWTError

  • All Implemented Interfaces:
    Serializable
    public class SWTError
extends Error
    This error is thrown whenever an unrecoverable error occurs internally in SWT. The message text and error code provide a further description of the problem. The exception has a throwable field which holds the underlying throwable that caused the problem (if this information is available (i.e. it may be null)).

    SWTErrors are thrown when something fails internally which either leaves SWT in an unknown state (eg. the o/s call to remove an item from a list returns an error code) or when SWT is left in a known-to-be-unrecoverable state (eg. it runs out of callback resources). SWTErrors should not occur in typical programs, although "high reliability" applications should still catch them.

    This class also provides support methods used by SWT to match error codes to the appropriate exception class (SWTError, SWTException, or IllegalArgumentException) and to provide human readable strings for SWT error codes.

    See Also:
    SWTException, SWT.error(int), Sample code and further information, Serialized Form

    • Field Detail

      • code

        public int code
        The SWT error code, one of SWT.ERROR_*.

      • throwable

        public Throwable throwable
        The underlying throwable that caused the problem, or null if this information is not available.

    • Constructor Detail

      • SWTError

        public SWTError()
        Constructs a new instance of this class with its stack trace filled in. The error code is set to an unspecified value.

      • SWTError

        public SWTError​(String message)
        Constructs a new instance of this class with its stack trace and message filled in. The error code is set to an unspecified value. Specifying null as the message is equivalent to specifying an empty string.
        Parameters:
        message - the detail message for the exception

      • SWTError

        public SWTError​(int code)
        Constructs a new instance of this class with its stack trace and error code filled in.
        Parameters:
        code - the SWT error code

      • SWTError

        public SWTError​(int code,
                String message)
        Constructs a new instance of this class with its stack trace, error code and message filled in. Specifying null as the message is equivalent to specifying an empty string.
        Parameters:
        code - the SWT error code
        message - the detail message for the exception

    • Method Detail

      • getCause

        public Throwable getCause()
        Returns the underlying throwable that caused the problem, or null if this information is not available.

        NOTE: This method overrides Throwable.getCause() that was added to JDK1.4. It is necessary to override this method in order for inherited printStackTrace() methods to work.

        Overrides:
        getCause in class Throwable
        Returns:
        the underlying throwable
        Since:
        3.1

      • getMessage

        public String getMessage()
        Returns the string describing this SWTError object.

        It is combined with the message string of the Throwable which caused this SWTError (if this information is available).

        Overrides:
        getMessage in class Throwable
        Returns:
        the error message string of this SWTError object

      • printStackTrace

        public void printStackTrace()
        Outputs a printable representation of this error's stack trace on the standard error stream.

        Note: printStackTrace(PrintStream) and printStackTrace(PrintWriter) are not provided in order to maintain compatibility with CLDC.

        Overrides:
        printStackTrace in class Throwable