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.
SWTException, SWT#error(int), Sample code and further information
| Modifier and Type | Field and Description |
|---|---|
| public int | code
The SWT error code, one of SWT.ERROR_*. |
| pack-priv static final long | |
| public Throwable | throwable
The underlying throwable that caused the problem, or null if this information is not available. |
| Access | Constructor and Description |
|---|---|
| public | SWTError()
Constructs a new instance of this class with its stack trace filled in. The error code is set to an unspecified value. |
| public | |
| public | SWTError(int
the SWT error code code)Constructs a new instance of this class with its stack trace and error code filled in. |
| public |
| Modifier and Type | Method and Description |
|---|---|
| public Throwable | Returns: the underlying throwableOverrides java. |
| public String | Returns: the error message string of this SWTError objectOverrides java. |
| public void | printStackTrace()
Overrides java. |
| code | back to summary |
|---|---|
| public int code The SWT error code, one of SWT.ERROR_*. | |
| serialVersionUID | back to summary |
|---|---|
| pack-priv static final long serialVersionUID | |
| throwable | back to summary |
|---|---|
| public Throwable throwable The underlying throwable that caused the problem, or null if this information is not available. | |
| SWTError | back to summary |
|---|---|
| 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 | back to summary |
|---|---|
| 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
| |
| SWTError | back to summary |
|---|---|
| public SWTError(int code) Constructs a new instance of this class with its stack trace and error code filled in.
| |
| SWTError | back to summary |
|---|---|
| public SWTError(int code, String message) Constructs a new instance of this class with its
stack trace, error code and message filled in.
Specifying
| |
| getCause | back to summary |
|---|---|
| public Throwable getCause() Overrides java. 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. | |
| getMessage | back to summary |
|---|---|
| public String getMessage() Overrides java. 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). | |
| printStackTrace | back to summary |
|---|---|
| public void printStackTrace() Overrides java. 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.
| |