How to adjust speaker volume from Java program?

Question

I'm running Win Vista, at the lower right side of the window there is a speaker icon next to the clock, I can click on it and adjust the volume, I wonder if there is a way in my Java program to do this automatically?

For instance, when my Java program starts, it turns the volume to 80, and when the program exits, it changes the volume back to the original level. I don't mind using Runtime.getRuntime().exec() if there is a way to achieve this effect.

score 1 · Answer 1 · edited May 23 '17 at 10:32

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One of the main premises of Java is that an application written on it should work in any platform. That's why they dropped the support for environment variables in the Java 1.4 SDK but later re-enabled it. That's why there's no way to clean the Java console with a command like "cls", as it could work in some platforms but not in others.

That being said, you won't be able to do from Java. You can either create a JNI DLL in C++ or an application in C++ or in C# to do that.

More about doing this in C++:

change volume win32 c++

edited May 23 '17 at 10:32

Community

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answered Nov 14 '09 at 20:49

Ravi Wallau

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The argumentation regarding console control is broken. There is nothing wrong with ANSI sequences except Windows doesn't support Them out of the box. – Thorbjørn Ravn Andersen Nov 14 '09 at 22:06
@Thorbjorn I understand that my example is not so good for this case. – Ravi Wallau Nov 15 '09 at 03:53
@EricSchafer But you could do it by using the Windows API from C# (using DllImport), right? – Ravi Wallau Nov 15 '09 at 03:54
or use jna and a dll (same as jni I guess) – rogerdpack Jul 14 '10 at 19:06

score 1 · Answer 2 · answered Nov 14 '09 at 20:52

1

Take a look in javax.sound API. Here's a tutorial about that, specifically here (in chapter Changing a Line's Volume) you can read how to set the volume. This knowledge should give enough Google keywords to find examples.

answered Nov 14 '09 at 20:52

BalusC

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score 1 · Accepted Answer · answered Nov 19 '09 at 16:05

I used the following code to simulate a volume adjustment :

Robot robot;             // Set speaker volume to 80
try
{
  robot=new Robot();
  robot.mouseMove(1828,1178);
  robot.mousePress(InputEvent.BUTTON1_MASK);
  robot.mouseRelease(InputEvent.BUTTON1_MASK);
  robot.delay(90);
  robot.mouseMove(1828,906);
  robot.mousePress(InputEvent.BUTTON1_MASK);
  robot.mouseRelease(InputEvent.BUTTON1_MASK);
  robot.delay(260);
  robot.mousePress(InputEvent.BUTTON1_MASK);
  robot.mouseRelease(InputEvent.BUTTON1_MASK);
}
catch (AWTException ex)
{
  System.err.println("Can't start Robot: " + ex);
  System.exit(0);
}

And it worked !

score 0 · Answer 4 · answered Feb 19 '22 at 10:07

After opening the volume control with the mouse click you may also adjust volume with key up/down commands, if relative adjustment is appropriate for you.

import java.awt.event.KeyEvent;    
robot.keyPress(KeyEvent.VK_UP);
robot.delay(200);
robot.keyRelease(KeyEvent.VK_DOWN);

How to adjust speaker volume from Java program?

4 Answers4

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