The program receives multiple numbers from the command line and outputs the results after summing.

Design idea: Using the digital input function in the scanner class, the sum of the numbers is realized by the while loop, and the input of non-digital ending numbers is obtained by using the characteristics of while.

Program Flowchart:

：

SOURCE program code:

Package task;
Import java.util.*;
public class Num1 {
public static void Main (string[] args)
{

System.out.println ("Please enter the number of additions required");
System.out.print ("(last enter a non-digit to end the input):");
Scanner reader=new Scanner (system.in);
Double sum = 0;
int s=0;
while (Reader.hasnextdouble ())
{
Double q = reader.nextdouble ();
s = s + 1;
sum = sum + q;

}
System.out.print ("The number of these numbers and for:" +sum);

}
}

Results:

}

The program receives multiple numbers from the command line and outputs the results after summing.