public class HelloWorld {? ? public static void main(String[] args) { char today='日'; switch(today){ ? ?case '一': ? ?case '三': ? ?case '五': System.out.println("吃包子"); break; ? ?case '二': ? ?case '四': ? ?case '六': System.out.println("吃油條"); break; ? ?case '七': System.out.println("吃主席套餐"); } }}