javafiledialog

Java, after using FileDialog, compilation does not end

I have simple java code to select the file and return array.
When I use dedicated method (whole code below), my compilation (in IntelliJ) does not end -> it gets to the last lane of public static void main(String[] arg), it executes last lane System.out.println("Program ends."); but I don't get information from compilator:

Process finished with exit code -1


Instead I need to stop it manually and if I want to run it again I get information that I can't run the code in parallel, would I like to stop it and rerun now.

Whole code: 
import java.util.HashMap;               //import the HashMap class
import java.io.File;                    // Import the File class
import java.io.FileNotFoundException;   // Import this class to handle errors
import java.util.Scanner;               // Import the Scanner class to read text files
import java.awt.FileDialog;            
import java.awt.Frame;                 

public class Project1
{
    public static void main(String[] arg)
    {
        HashMap<Integer, int[][]> dicUsedFuncs = new HashMap<Integer, int[][]>();
        //import textfile with haskell code
        String[] arrString=SelectFile();
        System.out.println(arrString[0]);
        System.out.println(arrString[1]); 
        //scan load
        System.out.println("End");
    }
    private static String[] SelectFile()
    {
        String[] arrReturn = new String[2];
        String strDefaultPath=System.getProperty("user.dir");   //default location to open
        Frame frame = null;
        FileDialog fd = new FileDialog(frame, "Please choose a text file with code.", FileDialog.LOAD);
        fd.setDirectory(strDefaultPath);
        fd.setFile("*.txt");
        fd.setVisible(true);
        String filename = fd.getFile();                           //get just the selected file name
        if (filename == null) {
            arrReturn[0] = "NotSelected";
        }else {
            filename= new File(fd.getFile()).getAbsolutePath();  //get full file path of selected file
            arrReturn[0] = "Selected";
            arrReturn[1] = filename;
        }

        return arrReturn;
    }
}
Solution

  • I added following: