public void jButton9_actionPerformed(ActionEvent e) { java.util.List OutList = new LinkedList(); if (rtc != null) { OutList = rtc.GetTerminalOnLineStatus(TerminalInfoList); } else { System.out.println("no object,create it first"); } if (OutList != null) { for (int i = 0; i < OutList.size(); i++) { TerminalOnLineStatus to = (TerminalOnLineStatus) OutList.get(i); memo1.append(to.TerminalAddress + " OnLineStatus is " + to.OnLineStatus + "\r\n"); } } }