简单 java 打开文件的过程莫名其妙结束

Question

Part of my program needs to open files and documents, wait until user manually closes them and then deletes them. So I have a separate thread that just opens the file with Process class and waits for the Process to end, than it deletes the file. Here is the code:

@Override
    public void run() {
        try {
            ProcessBuilder ps=new ProcessBuilder("cmd.exe","/C",path);
            Process p=ps.start();
            p.waitFor();
            ps=new ProcessBuilder("cmd.exe","/C","del",path);
            p=ps.start();
            p.waitFor();
        }catch(IOException | InterruptedException e) {
            e.printStackTrace();
        }
    }

This works with pdf, txt or docx documents, but it doesn't work with images, the png or jpg files. In case of an image, thread opens the image with Windows Photos program but doesn't wait for process to end, instead it acts like the process is already dead and proceedes to delete it right after opening it, so instead of an image I see this:

My question is why does it act like the Process is immediately dead when I open PNG or JPG files, but it works normally when I open PDF, TXT, DOCX files? Is the problem in Windows Photos viewer maybe?

I managed to open image files adding

Thread.sleep(5000);

right after opening an image, but it still deletes the image after 5 seconds, it just somehow still stays open in Windows Photos viewer even if it has been deleted. Clearly this is not the solution, I want to properly solve this situation.

Answer 1

You can delete the file when your program exits. Why do you want that the File is delete right after the file is closed?

File file = new File("path");
file.deleteOnExit();