package osm.jp.gpx.matchtime.gui; import java.util.Observable; public class ParameterData extends Observable { String content = ""; String getContent() { return content; } void setContent(String content) { this.content = content; setChanged(); super.notifyObservers(content); clearChanged(); } @Override public void notifyObservers(Object arg) { setContent(arg.toString()); } }