PrintScreen in java only working when main?

Question

I've been trying to add this code to my project :

public static void Save() throws HeadlessException, AWTException, IOException
{
    Toolkit tk = Toolkit.getDefaultToolkit();
    Dimension Dim = tk.getScreenSize();
    Rectangle screenRect = new Rectangle(Dim);
    Robot r = new Robot();
    BufferedImage screenCapturedImage = r.createScreenCapture(screenRect);
    DateFormat dateFormat = new SimpleDateFormat("yyyy MM dd HH:mm:ss");
    Date date = new Date();
    String FileName = dateFormat.format(date);
    ImageIO.write(screenCapturedImage, "png", new File("/home/caio/Desktop/"+FileName+".png"));
}

it gives me this error :

Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - Erroneous sym type: RoboCore.Print.Save
    at Core.Start.main(Start.java:23)
Java Result: 1

I want to call this method to print the results on my screen, but this code won't work because it's not a main method, it seems very strange to me...

Answer 1

I've tried compiling and running your code, I don't get any issues when calling it from main:

public static void main(String[] args) {
   try {
      Save();
   } catch (Exception e) {
      // Handle the exception
   }
}

Answer 2

public static void main(String args[])

{

 //remaining code write here;

}

Answer 3

public static void save() throws AWTException, IOException
{
        Toolkit tk = Toolkit.getDefaultToolkit();
    Dimension Dim = tk.getScreenSize();
    Rectangle screenRect = new Rectangle(Dim);
    Robot r = new Robot();
    BufferedImage screenCapturedImage = r.createScreenCapture(screenRect);
    Format dateFormat = new SimpleDateFormat("yyyy-MM-dd HH_mm_ss");
    Date date = new Date();
    String FileName = dateFormat.format(date);

    ImageIO.write(screenCapturedImage, "png", new File("/home/caio/Desktop/" + FileName + ".png"));
    }

try that code it worked for me.

your problem was in the ImageIO.write method, you added " where unneeded

all i changed was "/home/caio/Desktop/"+FileName+".png" to "/home/caio/Desktop/" + FileName + ".png"

and the date format

then call it by

public static void main(String[] args)
{
   try
   {
       save();
   }
   catch(Exception e)
   {
       System.out.println(e);
   }
}