2回答

• 

  慕侠6074426

  2017-12-28 11:15:31

  private static final long serialVersionUID = 1L;这是什么意思？

  
  

  1 0

  qq_慕UI...

  定义了一个私有的静态long整形常量serialVersionUID，并赋值为1.

  2018-12-27 23:41:29

  共 1 条回复 >

• 

  C_Justin

  2017-12-28 01:42:00

  import java.util.Scanner;

  public class GLmethod {
   
     public static void main(String[] args) {
        //连续输入n个数
        System.out.println("请输入需从键盘键入的数字个数：");
        Scanner scanner = new Scanner(System.in);
     int n = scanner.nextInt();
     double sum = 0;
     double average = 0;
     int m = 0;
     //try...catch
     try {
      //从键盘键入多个数值
      for(int i = 1; i < n + 1 ; i ++) {
       System.out.println("请输入第" + i + "个数字：");
       Scanner inPut = new Scanner(System.in);
       int j = inPut.nextInt();
       gl(j);
        sum += j ;
        m ++ ;
      }
     } catch (defException e) {
      System.out.println("这是一个非法的成绩数据");
     }  finally {
       if(m != 0) {
       average = sum / m;
       System.out.println("输入的数和为：" + sum + "\n平均值为：" + average);
       }
        }
        }

   
       public static int gl(int j) {
        if(j >= 100 || j <=0) { 
        throw new defException ("程序终止");
       } 
    return 1 ;
       }
  }
  

  
  

  public class defException extends RuntimeException {

  
   private static final long serialVersionUID = 1L;
     
   public defException() {}
   
   public defException(String message) {
    super(message);
   }
  }

  
  

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