Java的JOptionPane的不else語句

Question

我寫了這個代碼爲我的更新類展示，但由於某種原因，它不會得到在Joptionpane的}else{語句後在底部：

JOptionPane.showMessageDialog(null,"Currently no updates available!!");

相反，它會公正return出..這是好的，但我也想它通知用戶。我與格式更新中... intcurrentversion = 2，所以它應該運行Joptionpane

public static void main(String[] args) throws IOException { 
    ImageIcon updateicon = new ImageIcon("resources/update.png"); 
    String url = "http://example.com/wp-content/uploads/version/Version.html"; 
    Document document = Jsoup.connect(url).get(); 
    String getcurrentversion = document.select("version").first().text(); 
    int intcurrentversion = Integer.parseInt(getcurrentversion);  
    System.out.println(intcurrentversion); 

    if (intcurrentversion > 2) { 

     int response = JOptionPane.showConfirmDialog(null, "Would you like to update?", "Update available!", 
      JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE,updateicon); 

     if (response == JOptionPane.NO_OPTION) { 
      System.out.println("No button clicked"); 
     } else if (response == JOptionPane.YES_OPTION) { 
      System.out.println("Yes button clicked"); 

      { 
       String filePath = "C:/Windows/Updater.exe";// 
       try { 
        Process p = Runtime.getRuntime().exec(filePath); 

       } catch (Exception g) { 
        g.printStackTrace(); 
       } 
      } 


     } else { 
      JOptionPane.showMessageDialog(null,"Currently no updates available!!"); 

     } 
    } 
} 

}

Answer 1

這裏是固定的縮進你的程序：

import java.io.IOException; 
import javax.swing.ImageIcon; 
import javax.swing.JOptionPane; 
import org.jsoup.Jsoup; 
import org.jsoup.nodes.Document; 

public class CheckForUpdate { 

    public static void main(String[] args) throws IOException { 
     ImageIcon updateicon = new ImageIcon("resources/update.png"); 
     String url = "http://example.com/wp-content/uploads/version/Version.html"; 
     Document document = Jsoup.connect(url).get(); 
     String getcurrentversion = document.select("version").first().text(); 
     int intcurrentversion = Integer.parseInt(getcurrentversion);  
     System.out.println(intcurrentversion); 

     if (intcurrentversion > 0) { 

      int response = JOptionPane.showConfirmDialog(null, "Would you like to update?", "Update available!", 
       JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE,updateicon); 

      if (response == JOptionPane.NO_OPTION) { 
       System.out.println("No button clicked"); 
      } else if (response == JOptionPane.YES_OPTION) { 
       System.out.println("Yes button clicked"); 

       { 
        String filePath = "C:/Windows/Updater.exe";// 
        try { 
         Process p = Runtime.getRuntime().exec(filePath); 

        } catch (Exception g) { 
         g.printStackTrace(); 
        } 
       } 


      } else { 
       JOptionPane.showMessageDialog(null,"Currently no updates available!!"); 

      } 
     } 
    } 
} 

我希望這是現在很明顯，爲什麼消息不會顯示當intcurrentversion < = 0.