package trader.gui;import org.apache.log4j.AppenderSkeleton;import org.apache.log4j.spi.LoggingEvent;import trader.*;public class GuiLogHandler extends AppenderSkeleton{ /** Creates a new instance of SwingLoghandler */ String logMessage=new String(""); GuiLogService logDisplay; java.text.DateFormat df= java.text.DateFormat.getDateTimeInstance(); @Override protected void append(LoggingEvent logEvent) { // **1 Format the log record and publish it using the GuiLogService object // ** logDisplay java.util.Date date = new java.util.Date(); String dateString=df.format(date); logMessage=dateString+" "+logEvent.getLevel()+" "+logEvent.getMessage()+"\n"; logDisplay.setLog(logMessage); } public void setServiceCallback(GuiLogService logDisplay) { this.logDisplay = logDisplay; } public void flush(){ } public void close(){ logMessage=null; } @Override public boolean requiresLayout() { // TODO Auto-generated method stub return false; }}