public final void clear ( ) throws IOException { if ( ( bufferSize == 0 ) && ( out != null ) ) // clear() is illegal after any unbuffered output (JSP.5.5) throw new IllegalStateException ( getLocalizeMessage ( "jsp.error.ise_on_clear" ) ) ; if ( flushed ) throw new IOException ( getLocalizeMessage ( "jsp.error.attempt_to_clear_flushed_buffer" ) ) ; ensureOpen ( ) ; if ( buf != null ) buf . pos = buf . offset ; }
Discard the output buffer .