selectdiskmaker.java

《A first book of java》by Gary J.Bronson 北大出版社

import javax.swing.*;
import java.text.*;  // needed for formatting
public class SelectDiskMaker
{
  public static void main(String[] args)
  {
    String s1, outMessage;
    int code;
    s1 =JOptionPane.showInputDialog("Enter a number:");
    code = Integer.parseInt(s1);
    switch (code)
    {
      case 1:
        outMessage = "3M Corporation";
        break;
      case 2:
        outMessage = "Maxell Corporation";
        break;
      case 3:
        outMessage = "Sony Corporation";
        break;
      case 4:
        outMessage = "Verbatim Corporation";
        break;
      default:
        outMessage = "An invalid code was entered";
  }     // end of switch
    
    JOptionPane.showMessageDialog(null, outMessage, 
                    "Program 4.6", 
                    JOptionPane.INFORMATION_MESSAGE);
    
    System.exit(0);  
  } // end of main()
}  // end of class