how to save open unsaved notepad files using java application

Question

How to save an unsaved notepad file using java ? that notepad file is not created by my program. and the condition is there is only one notepad file opened. i have used Process and Runtime class but not able to understand how to save the file because i dont know the path of file.

*because i dont know the path of file* Because there is no path yet? — Manu, Dec 09 '15 at 10:53
some xyz application created notepad file and i want to save this file — nikhil, Dec 09 '15 at 10:56
I don't understand this question. Please edit your question and add your code — Si mo, Dec 09 '15 at 11:09
@nikhil: you can not open that file in your Java application, because the file doesn't exist yet. — Stultuske, Dec 09 '15 at 11:15
can i get the instance of that notepad file from process class or can i get the content of notepad file — nikhil, Dec 09 '15 at 11:25

score 0 · Answer 1 · edited May 23 '17 at 11:52

Some help, but it would be more robust to do it in C/C++/C# !

1 you must find your Notepad app.

it is note easy, and sure. See this: Find out what application (window) is in focus in Java

you can use JNI or JNA.

2 if you know where your app is , send a ctrl^s : see this for sending keystroke to an app. It can work if nothing is currently done inside:

Robot robot = new Robot();
robot.mouseMove(100, 100);
robot.mousePress(InputEvent.BUTTON1_MASK);
robot.mouseRelease(InputEvent.BUTTON1_MASK);
 robot.keyPress(KeyEvent.VK_CONTROL);
 robot.keyPress(KeyEvent.VK_S);
 robot.keyRelease(KeyEvent.VK_S);
 robot.keyRelease(KeyEvent.VK_CONTROL);

How to programmatically send a key event to any window/process in a Java App?

Note that:

it works if notepad is in front of your screen. Otherwise
it works if the file has already a name. If not, it only open a dialog to choose the file. You can also send a file name.

how to save open unsaved notepad files using java application

1 Answers1