package com.xingzhuang;

import java.util.Scanner;
public class test1{
?? ?public static void main(String[]args){
?? ??? ?char weekSecond;
?? ??? ?Scanner input=new Scanner(System.in);
??????? System.out.println("請(qǐng)輸入第一個(gè)字母");
??????? String letter=input.next();

??????? if(letter.length()==1){
?????? ??? ?
?????? ??? ?char weekFirst=letter.charAt(0);
?????? ??? ?switch(weekFirst){
?????? ??? ?case'm':

??????? case'M':

?????? ??? ?System.out.println("星期一");

?????? ??? ?break;


??????? case't':


??????? case'T':


?????? ??? ?System.out.println("由于星期二和星期四都是T開頭，請(qǐng)繼續(xù)輸入第二個(gè)字母");

?
?????? ??? ?letter=input.next();


?????? ??? ?if(letter.length()==1){


?????? ??? ??? ?weekSecond=letter.charAt(0);


?????? ??? ??? ?if(weekSecond=='U'||weekSecond=='u'){

?? ?
?????? ??? ??? ??? ?System.out.println("星期二");

?????? ??? ??? ??? ?break;


?????? ??? ??? ?}else if(weekSecond=='H'||weekSecond=='h'){
?? ?
?????? ??? ??? ??? ?System.out.println("星期四");
?? ?
?????? ??? ??? ??? ?break;


?????? ??? ??? ?}else{??????????????????????????????????????????????? //這里的else有錯(cuò)，不懂


?????? ??? ??? ??? ?System.out.println("輸入第二個(gè)錯(cuò)誤，請(qǐng)重新輸入");


?????? ??? ??? ??? ?break;
?????? ??? ??? ??? ?}


?????? ??? ?} else{??????????????????????????????????????????? //這里的else有錯(cuò)，不懂


?????? ??? ??? ?System.out.println("輸入超過一個(gè)字母，請(qǐng)重新輸入");


?????? ??? ??? ?break;


?????? ??? ?}




??????? case'w':


??????? case'W':


?????? ??? ?System.out.println("星期三");


?????? ??? ?break;


??????? case'f':


??????? case'F':


?????? ??? ?System.out.println("星期五");


?????? ??? ?break;


??????? case's':


??????? case'S':


?????? ??? ?System.out.println("星期六和星期天都是s開頭，需要輸入第二個(gè)字母");


?????? ??? ?letter=input.next();


?????? ??? ?if(letter.length()==1){
?????? ??? ??? ?weekSecond=letter.charAt(0);


?????? ??? ??? ?if(weekSecond=='A'||weekSecond=='a'){


?????? ??? ??? ??? ?System.out.println("星期六");


?????? ??? ??? ??? ?break;


?????? ??? ??? ?}


?????? ??? ??? ?else if(weekSecond=='U'||weekSecond=='u'){


?????? ??? ??? ??? ?System.out.println("星期天");


?????? ??? ??? ??? ?break;


?????? ??? ??? ?}else{


?????? ??? ??? ??? ?System.out.println("輸入錯(cuò)誤，請(qǐng)重新輸入");


?????? ??? ??? ?}


?????? ??? ?}else{??????????????????????????????????????????????? //這里的else有錯(cuò)，不懂


?????? ??? ??? ??? ?System.out.println("輸入超過一個(gè)字母，請(qǐng)重新輸入");


?????? ??? ??? ??? ?break;


?????? ??? ??? ?}

??????? default:


?????? ??? ?System.out.println("默認(rèn)輸出，無法識(shí)別，請(qǐng)重新輸入");


?????? ??? ?break;
?????? ??? ?}


?????? ?

?????? ?
?????? ??? ?}else{


?????? ??? ??? ?System.out.println("最后輸入錯(cuò)誤，只能輸入一個(gè)字母，請(qǐng)重新輸入");


?????? ??? ?}


?? ?}
?? ?

}

第一處if(weekSecond=='U'||weekSecond=='u'){} 去掉 ;??? 第二次else 前面加{?

一個(gè)if 對(duì)應(yīng)一個(gè)else? 你上面已經(jīng)有else了