How to use FileDialog? | 易学教程

问题

I created an interface and I'd like to add a function that allows user to open a file. I'm using AWT. I don't understand how to use FileDialog. Can you please give me an example or a good link that explain this?

回答1:

A complete code example, with file filtering:

FileDialog fd = new FileDialog(yourJFrame, "Choose a file", FileDialog.LOAD);
fd.setDirectory("C:\\");
fd.setFile("*.xml");
fd.setVisible(true);
String filename = fd.getFile();
if (filename == null)
  System.out.println("You cancelled the choice");
else
  System.out.println("You chose " + filename);

回答2:

To add to the answer by @TheBronx - for me, fd.setFile("*.txt"); is not working on OS X. This works:

fd.setFilenameFilter(new FilenameFilter() {
    @Override
    public boolean accept(File dir, String name) {
        return name.endsWith(".txt");
    }
});

Or as a fancy Java 8 lambda:

fd.setFilenameFilter((dir, name) -> name.endsWith(".txt"));

回答3:

There's a few code samples here that demonstrate how to use it for various different tasks.

That said, you might want to take a step back and check whether awt is the best task for the job here. There are valid reasons for using it over something like swing / swt of course, but if you're just starting out then Swing, IMO would be a better choice (there's more components, more tutorials and it's a more widely requested library to work with these days.)

来源：https://stackoverflow.com/questions/7211107/how-to-use-filedialog

标签

java

awt