Java万年历源码,   TextField tfYear = new TextField("2004", 5); //显示年份的文本域   Choice monthChoice = new Choice(); //月份选择下拉框   Button btUpdate = new Button("更新"); //更新按钮   GregorianCalendar calendar=new GregorianCalendar(); //日历对象   Font smallFont = new Font("TimesRoman", Font.PLAIN, 15); //显示小字体