Java多行输入，行数未知

华为2019.9.18笔试第一题：

判断数据是否合理，给了三种合理的情况，一个是两位数与一位数交替出现，一个是两头是两位数，中间全是一位数，最后一种情况是两头是一位数，中间全是两位数。

 

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import java.util.ArrayList; import java.util.List; import java.util.Scanner;   public class Main9 {       public static void main(String[] args) {         // TODO Auto-generated method stub         Scanner scanner = new Scanner(System.in);         List<String> list = new ArrayList<String>();         String s;         while(true){             if((s = scanner.nextLine()).equals("")){                 break;             }             list.add(s);         }         for(int i = 0; i < list.size(); i++){             String string = list.get(i);             String temp[] = string.split(" ");             int res[] = new int[temp.length];             for(int j = 0; j < temp.length; j++){                 res[j] = Integer.parseInt(temp[j]);             }             System.out.print(isequ(res) + " ");         }     }           public static boolean isequ(int a[]) {                   if(a[0] >= 10 && a[a.length - 1] >= 10){             for(int i = 1; i < a.length - 1; i++){                 if(a[i] >= 10){                     return false;                 }             }         }else if (a[0] < 10 && a[a.length - 1] < 10) {             for(int i = 1; i < a.length - 1; i++){                 if(a[i] < 10){                     return false;                 }             }         }else {             for(int i = 0; i < a.length; i++){                 if(i % 2 == 0 && a[i] >= 10){                     return false;                 }else if(i % 2 == 1 && a[i] < 10){                     return false;                 }             }         }         return true;     } }