JOptionPane 运行不工作

Question

我正在开发一个程序，但我不明白该程序有什么问题，我试图让它工作，但每次我运行它并输入答案时，它都会在回答。帮助。

import javax.swing.JOptionPane;

public class Furniture
{
   public static void main(String args[]) 
   {
       String response_1 = JOptionPane.showInputDialog(null, "Type of Table - 1)Pine Wood, 2)Oak, 3)Mahogany");
       int type_of_wood = Integer.parseInt(response_1);
      String response_2 = JOptionPane.showInputDialog(null, "Size of table - 4)Small, or 5)Large");
      int size = Integer.parseInt(response_2);
      int price_of_wood = 0;
      int price_of_table = 0;
       switch(type_of_wood)
      {

       case 1:
          price_of_wood = 100;
          break;

       case 2:
          price_of_wood = 225;
          break;

       case 3:
          price_of_wood = 310;
          break;

      case 4:
         price_of_table = 0;
         break;

      case 5:
         price_of_table = 35;
         break;

       default:
          JOptionPane.showMessageDialog(null, "Unknown Number entered.");
    }
    JOptionPane.showMessageDialog(null, "The price is " + price_of_wood + price_of_table + " dollars");
    }
}

Answer 1

当您在println() 中使用int、float 等变量和String 来显示输出时，它们会被连接而不是添加或您尝试执行的任何操作。因此，首先评估要输出的表达式。试试这个，

 int price = price_of_wood + price_of_table;
 JOptionPane.showMessageDialog(null, "The price is " + price + " dollars");