import javax.swing.JOptionPane;
import java.util.Scanner;
public class ShippingCost
{
public static void main(String[] args)
{
Scanner input= new Scanner(System.in);
JOptionPane.showInputDialog("Please enter the length of your package: ");
double length=input.nextDouble();
JOptionPane.showInputDialog("Please enter the width of your package: ");
double width=input.nextDouble();
JOptionPane.showInputDialog("Please enter the height of your package: ");
double height=input.nextDouble();
double dimensions= length * width * height;
System.out.println("The total dimensions of your package is: " dimensions);
double charge=0;
double surcharge;
double additionalCharge;
double totalCost;
代碼編譯得很好，但是將它作為應用程式運行以測驗輸入是我遇到問題的地方。出現第一個輸入框，然后按回車后不會做任何其他事情。我是 Java 的新手，只停留在這一點上...
uj5u.com熱心網友回復：
您應該使用的回傳值JOptionPane.showInputDialog來獲取用戶的輸入，例如
double length = Double.valueOf(JOptionPane.showInputDialog("Please enter the length of your package: "));
等等。
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