java swith小程序。。

Question

刚写的JAVA小程序出错了
哪为高手给看看。。万分感谢import java.io.*; 
public class MyDate
{
  public static void main(String args[])
   {
 int day=1;
 int month=1;
 int year=2008;
InputStreamReader reader = new InputStreamReader(System.in); 
BufferedReader input=new BufferedReader(reader); 
     try
{
            System.out.println("请输入年：(year>=1700 && year<=2010)"); 
           year=Integer.parseInt(input.readLine()); 
            System.out.println("你输入月：month>=1 && month<=12"); 
           month=Integer.parseInt(input.readLine()); 
            System.out.println("请输入日：day>=1 && day<=31"); 
           day=Integer.parseInt(input.readLine()); 
         if(year>=1700 && year<=2010)
           {  
      if((year%4==0&&year%100!=0)||(year%400==0))
       {
                 System.out.println("闰年");
   swith(month)
                     { 
case 1,3,5,7,8,10,12:
                           if(day>=1 && day<=31)
                           System.out.println("您输入的日期："+year+"-"+month+"-"+day);
 break;
                       case 2:
                          if(day>=1 && day<=29)
                               System.out.println("您输入的日期："+year+"-"+month+"-"+day);
 break;
case 4,6,9,11:
  if(day>=1 && day<=30)
                             System.out.println("您输入的日期："+year+"-"+month+"-"+day);
 break;
default:
                          System.out.println("信息错误");
                         break;
     }
               }
               else
               {
                 System.out.println("非闰年");
 swith(month)
                     { 
case 1,3,5,7,8,10,12:
                           if(day>=1 && day<=31)
                                System.out.println("您输入的日期："+year+"-"+month+"-"+day);
                         break;
                       case 2:
                          if(day>=1 && day<=28) 
                                System.out.println("您输入的日期："+year+"-"+month+"-"+day);
   break;
case 4,6,9,11:
  if(day>=1 && day<=30)
                               System.out.println("您输入的日期："+year+"-"+month+"-"+day);
 break;
default:
                          System.out.println("信息错误");
         break;
     }

        } 
             }
            else {System.out.println("信息错误");}
          }       catch(IOException e)
           { 
      System.err.println("Error is "+e.getMessage());
           } 
     }
}

Answer 1

switch全都写错了，case的用法完全乱搞，改了一下import java.io.*;public class MyDate { public static void main(String args[]) {
int day = 1;
int month = 1;
int year = 2008;
InputStreamReader reader = new InputStreamReader(System.in);
BufferedReader input = new BufferedReader(reader);
try {
System.out.println("请输入年：(year>=1700 && year <=2010)");
year = Integer.parseInt(input.readLine());
System.out.println("你输入月：month>=1 && month <=12");
month = Integer.parseInt(input.readLine());
System.out.println("请输入日：day>=1 && day <=31");
day = Integer.parseInt(input.readLine());
if (year >= 1700 && year <= 2010) {
if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {
System.out.println("闰年");
switch (month) {
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
if (day >= 1 && day <= 31)
System.out.println("您输入的日期：" + year + "-" + month
+ "-" + day);
break;
case 2:
if (day >= 1 && day <= 29)
System.out.println("您输入的日期：" + year + "-" + month
+ "-" + day);
break;
case 4:
case 6:
case 9:
case 11:
if (day >= 1 && day <= 30)
System.out.println("您输入的日期：" + year + "-" + month
+ "-" + day);
break;
default:
System.out.println("信息错误");
break;
}
} else {
System.out.println("非闰年");
switch (month) {
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
if (day >= 1 && day <= 31)
System.out.println("您输入的日期：" + year + "-" + month
+ "-" + day);
break;
case 2:
if (day >= 1 && day <= 28)
System.out.println("您输入的日期：" + year + "-" + month
+ "-" + day);
break;
case 4:
case 6:
case 9:
case 11:
if (day >= 1 && day <= 30)
System.out.println("您输入的日期：" + year + "-" + month
+ "-" + day);
break;
default:
System.out.println("信息错误");
break;
}
}
} else {
System.out.println("信息错误");
}
} catch (IOException e) {
System.err.println("Error is " + e.getMessage());
}
}
}

Answer 2

switch写错了。还有case语句有问题。
import java.io.*;
public class MyDate 
{ 
  public static void main(String args[]) 
  { 
int day=1; 
int month=1; 
int year=2008; 
InputStreamReader reader = new InputStreamReader(System.in); 
BufferedReader input=new BufferedReader(reader); 
    try 
{ 
            System.out.println("请输入年：(year>=1700 && year <=2010)"); 
          year=Integer.parseInt(input.readLine()); 
            System.out.println("你输入月：month>=1 && month <=12"); 
          month=Integer.parseInt(input.readLine()); 
            System.out.println("请输入日：day>=1 && day <=31"); 
          day=Integer.parseInt(input.readLine()); 
        if(year>=1700 && year <=2010) {  
      
         if((year%4==0&&year%100!=0)||(year%400==0)) { 
                System.out.println("闰年"); 
                 switch(month){ 
case 1:
case 3:

case 5:
case 7:
case 8:
case 10:
case 12:
                          if(day>=1 && day <=31) 
                          System.out.println("您输入的日期："+year+"-"+month+"-"+day); 
                           break; 
                    case 2: 
                          if(day>=1 && day <=29) 
                              System.out.println("您输入的日期："+year+"-"+month+"-"+day); 
break; 
case 4: 
case 6:
case 9:
case 11:
if(day>=1 && day <=30) 
                            System.out.println("您输入的日期："+year+"-"+month+"-"+day); break;
         
default: 
                          System.out.println("信息错误");  break; 
                    } 
              } 
              else 
              { 
                System.out.println("非闰年"); 
                 switch(month) { 
                    case 1: 
                    case 3:
                    case 5:
                    case 7:
                    case 8:
                    case 10:
                    case 12:
                             
                          if(day>=1 && day <=31) 
                                System.out.println("您输入的日期："+year+"-"+month+"-"+day); 
                        break; 
                      case 2: 
                          if(day>=1 && day <=28) 
                                System.out.println("您输入的日期："+year+"-"+month+"-"+day); 
                           break; 
                      case 4: 
                      case 6:
                      case 9:
                      case 11:
  if(day>=1 && day <=30) 
                              System.out.println("您输入的日期："+year+"-"+month+"-"+day); 
break; 
default: 
                          System.out.println("信息错误"); 
break; 
                    }         } 
            } 
            else {System.out.println("信息错误");} 
          }       catch(IOException e) 
          { 
      System.err.println("Error is "+e.getMessage()); 
          } 
    } 
}