@Override
    public synchronized void flush() {
        if (trouble) {
            return;
        }

        if (isDestinationActivated()) {
            try {
                getOut().flush();
            }
            catch (IOException e) {
                handleIOException(e);
            }
        }
    }
@ Override public synchronized void flush ( ) { if ( trouble ) { return ; } if ( isDestinationActivated ( ) ) { try { getOut ( ) . flush ( ) ; } catch ( IOException e ) { handleIOException ( e ) ; } } }
Flush the stream.

@see #checkError()