I have a program on eclipse and exported it as a runnable JAR file, how do I run it on a double click?

Question

import java.util.Scanner;

public class NumberAverager {

/**
 * Averages Inputted Numbers
 */
public static void main(String[] args) {

    int num1;
    int total = 0;
    int count = 0;
    //int[] numArray = new int[count];
    String input;
    Scanner keyboard = new Scanner(System.in);

    do
    {   
        if (count == 0)
        {
            System.out.println("Please enter the first number you wish to average.");
            input = keyboard.nextLine();
        }

        count++;

        System.out.println("Please enter your next number or 'calculate' to find the average.");
        input = keyboard.nextLine();

            try 
            {
                num1 = Integer.parseInt(input);
                total = total + num1;
                //numArray[count]=num1;  
            }

                catch (NumberFormatException e)
                {
                        System.out.println("You entered " + count + " numbers.");
                        System.out.println("The average is " + (float)total/count);
                        //System.out.println(numArray[count]);
                        input = "calculate";
                }


    } while (input!= "calculate");

    keyboard.close();
}
}

There's my program if that helps,

The manifest says the following:

Manifest-Version: 1.0
Main-Class: NumberAverager

It's just a short program to try to do this, but I don't know what else I have to do to make it work, I'm not sure how to run it from the command line to try it that way, and upon double clicking it the mouse loads for a second and nothing happens

thanks

I'm very new to java, only a beginning semester under my belt, so I need very detailed explanations on how to do this, thanks again

Answer 1

You need a UI for it to display something when you double click. Otherwise it will run the code but its not gonna display anything.

Here is a tutorial on making a GUI

Answer 2

使用java -jar在命令提示符下执行jar文件。

java -jar C:/path/to/jar/your_jar_file.jar 

Answer 3

java -jar <PATH_TO_YOUR_JAR_FILE>

并确保$ PATH中有java