用Java打开/关闭计算机音量？ [英] Turning the computer volume up/down with Java?

问题描述

我想用一个命令上下调整计算机的主音量（100％/ 0％）。
我看到我可以使用 FloatControl ，但我不知道如何使用它。

I want to turn the master volume of the computer up and down (100%/0%), with just a command. I saw that I could use FloatControl, but I'm not sure how to use it.

推荐答案

看看使用JavaSound控制主音量。

从链接：

Mixer.Info [] mixers = AudioSystem.getMixerInfo();  
System.out.println("There are " + mixers.length + " mixer info objects");  
for (Mixer.Info mixerInfo : mixers)  
{  
    System.out.println("Mixer name: " + mixerInfo.getName());  
    Mixer mixer = AudioSystem.getMixer(mixerInfo);  
    Line.Info [] lineInfos = mixer.getTargetLineInfo(); // target, not source  
    for (Line.Info lineInfo : lineInfos)  
    {  
        System.out.println("  Line.Info: " + lineInfo);  
        Line line = null;  
        boolean opened = true;  
        try  
        {  
            line = mixer.getLine(lineInfo);  
            opened = line.isOpen() || line instanceof Clip;  
            if (!opened)  
            {  
                line.open();  
            }  
            FloatControl volCtrl = (FloatControl)line.getControl(FloatControl.Type.VOLUME);  
            System.out.println("    volCtrl.getValue() = " + volCtrl.getValue());  
        }  
        catch (LineUnavailableException e)  
        {  
            e.printStackTrace();  
        }  
        catch (IllegalArgumentException iaEx)  
        {  
            System.out.println("    " + iaEx);  
        }  
        finally  
        {  
            if (line != null && !opened)  
            {  
                line.close();  
            }  
        }  
    }  
} 

这篇关于用Java打开/关闭计算机音量？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！