求大神解释一下，哪里错了
public class HelloWorld {
public static void main(String[] args) {
String today="日";
if (today.equals("一")){
System.out.println("吃包子");
}else if(today.equals("三")){
System.out.println("吃包子");
}else if(today.equals("五")){
System.out.println("吃包子");
}else if(today.equals("日")){
System.out.println("吃主席套餐");
}else {System.out.println("吃油条");
