number.java

很多的小代码哦 自己写的还可以哦有不知道的可以留言给我哦

import java.util.*;
public class Number
{
  public static void main(String[] args)
{
   int number=0,d5,d4,d3,d2,d1;
   Scanner reader=new Scanner(System.in);
   System.out.println("从键盘输入一个1至99999之间数: ");
    while(reader.hasNextInt())
   {
//  System.out.println(" ");  
   number=reader.nextInt();
   if(number>=1&&number<=99999)
     {
        d5=number%100000/10000;
        d4=number%10000/1000;
        d3=number%1000/100;
        d2=number%100/10;
        d1=number%10;
        if(number>=10000)
         {
            System.out.println(+number+"是5位数");
	if(d5==d1&&d4==d2)
 	  System.out.println(+number+"是回文数");
	else
	   System.out.println(+number+"不是回文数");	
           }
         else if(number>=1000)
         {
             System.out.println(+number+"是4位数");
                if(d4==d1&&d3==d2)
	System.out.println(+number+"是回文数");
	else
	System.out.println(+number+"不是回文数");	
           }
         else if(number>=100)
          {
             System.out.println(+number+"是3位数");
               if(d3==d1)
	System.out.println(+number+"是回文数");
               else
	System.out.println(+number+"不是回文数");	
            }
          else if(d2!=0)
          {
              System.out.println(+number+"是2位数");
	if(d1==d2)
	System.out.println(+number+"是回文数");
	else
	System.out.println(+number+"不是回文数");	
              }
         else if(d1!=0)
            {
	System.out.println(+number+"是1位数");
	System.out.println(+number+"是回文数");
              }
   }
  else
   System.out.println(+number+"不在1至99999之间");
   System.out.println("  ");
   System.out.println("你可以继续输入整数,或输入非整数结束程序："); 
 }
   System.out.println(" ");
   System.out.println("你输入的数据不是整数，程序已经推出！");
   System.out.println(" ");
}
}