switch 后面小括号中表达式的值必须是整型或字符型

public class HelloWorld {
    public static void main(String[] args) {
  char today='日';
  switch(today){
       
        case '一':
            case '三':
                case  '五':
                    System.out.println("早餐吃包子");break;
                    case '二':
                        case '四':
                            case '六':
                                System.out.println("早餐吃油条");break;
                                case '日':
                                    System.out.println("吃主席套餐");
                                    break;
                                    default :
                                    System.out.println("啥都不吃");
       

String Str="名次"

switch(Str){

    case一：

        System.out.println("奖励为...");

        break;

    case二:

        System.out.println("奖励为...");

}