code: public void println(boolean b) throws IOException
      {    
          if(this._listener!= null &&  !checkIfCalledFromWLonError()){
              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled())    
                  Tr.debug(tc, "non blocking println boolean , WriteListener enabled: " + this._listener);          
  
              _outHelper.println_NonBlocking(Boolean.toString(b));
          }
          else {
              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled())    
                  Tr.debug(tc, "println boolean");
              String value = Boolean.toString(b);
              synchronized(this) {
                      this.write(value.getBytes(), 0, value.length());
                      this.write(CRLF, 0, 2);
              }
          }
      }
docs: /*
  @see javax.servlet.ServletOutputStream#println(boolean)