Input Output using java

Question

If we open a file with my java application and open the same file with another application and made some changes. The java application I made, should know it immedeately that this file is changed by some external application, and prompt the user to load the fresh content.
How to do it using java?

Take a look at http://stackoverflow.com/questions/494869/file-changed-listener-in-java — The Cat, Nov 15 '12 at 11:02

score 2 · Answer 1 · edited May 23 '17 at 11:55

2

This question is asked before here

https://stackoverflow.com/questions/5379458/java-filewatcher

read this http://docs.oracle.com/javase/tutorial/essential/io/notification.html

edited May 23 '17 at 11:55

Community

1
1

answered Nov 15 '12 at 11:04

Sap

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score 1 · Answer 2 · answered Nov 15 '12 at 11:03

1

You can make check in this handler:

frame.addWindowFocusListener(new WindowAdapter() {
    public void windowGainedFocus(WindowEvent e) {
        // TODO: read file again and compare with previous 
    }
});

answered Nov 15 '12 at 11:03

CAMOBAP

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score 0 · Answer 3 · edited May 23 '17 at 10:24

0

I think you have to have thread that polls for file information. See this question File changed listener in Java.

edited May 23 '17 at 10:24

Community

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answered Nov 15 '12 at 11:03

The Cat

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Input Output using java

3 Answers3