控制java应用程序中的卷 [英] Controlling volume in a java application

问题描述

我是java的新手。我需要在java应用程序中控制音量（音量增大/减小，静音）。我找不到办法做到这一点。我正在开发一个Linux系统（供参考）。

I am fairly new at java. I need to control volume (volume up/down, mute) in a java application. I couldn't find a way to do this. I am developing on a linux system (for information).

我厌倦了这段代码：

Java代码：

Port lineIn;
FloatControl volCtrl;
try {
  mixer = AudioSystem.getMixer(null);
  lineIn = (Port)mixer.getLine(Port.Info.LINE_IN);
  lineIn.open();
  volCtrl = (FloatControl) lineIn.getControl(

      FloatControl.Type.VOLUME);
  // Assuming getControl call succeeds, 
  // we now have our LINE_IN VOLUME control.
} catch (Exception e) {
  System.out.println("Failed trying to find LINE_IN"
    + " VOLUME control: exception = " + e);
}

但是我得到了执行

Failed trying to find LINE_IN VOLUME control: exception = java.lang.IllegalArgumentException: Line unsupported: COMPACT_DISC source port

感谢您的帮助

推荐答案

有时控件是嵌套的，这使得平台无关的解决方案很难。我编写了一个实用类，使用如下：

Sometimes the controls are nested, which makes a platform independent solution difficult. I have written an utility class which is used like that:

Audio.setMasterOutputVolume(0.5f);

源代码在这里： https://github.com/Kunagi/ilarkesto/blob/master/src/main/java/ilarkesto/media /Audio.java

Stackoverflow用户可以根据WTFPL的条款使用Audio.java中的代码。

Stackoverflow users can use the code from Audio.java under the terms of the WTFPL.

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