JDK核心API－－Java中配置信息的存取

  prefer.put(HOST_NAME,getHostName());
  prefer.putInt(PORT,getPort());
 }
 
 protected void loadConfig()
 {
  Preferences prefer = Preferences.userNodeForPackage(getClass());
  setHostName(prefer.get(HOST_NAME,""));
  setPort(prefer.getInt(PORT,9527));
 }

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