在Java中调用exe实现对计算机音量的控制

import java.awt.*;
import java.awt.font.*;
import java.awt.geom.*;
import java.awt.event.*;
import java.text.AttributedString;
import java.text.AttributedCharacterIterator;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.table.*;
import javax.swing.event.*;
import java.io.*;
public class VolumeTracker extends JPanel implements Runnable {
String welcomeStr = "Welcome to Java Sound";
Thread pbThread;
Color background = Color.white; //new Color(20, 20, 20);
Color jfcBlue = Color.blue; //new Color(204, 204, 255);
Color jfcDarkBlue = jfcBlue.darker();
Font font24 = new Font("serif", Font.BOLD, 24);
Font font28 = new Font("serif", Font.BOLD, 28);
Font font42 = new Font("serif", Font.BOLD, 42);
FontMetrics fm28, fm42;
String errStr=null;
String currentName=null;
double duration = 100.0;
double seconds = 82.0;
boolean midiEOM, audioEOM;
public VolumeTracker() {
fm28 = getFontMetrics(font28);
fm42 = getFontMetrics(font42);
initVolume();
start();
}
private void initVolume(){
try{
//这一段小程序实现对VC创建程序的调用
Runtime rt = Runtime.getRuntime();
//Time and Date.
//mngPathTool类,提供了一个获取当前路径的方法
mngPathTool tool = new mngPathTool();
String sexec = tool.getCurPath()+ "\\binex\\VolumeControl.exe 0";
Process child = rt.exec(sexec);
//获取控制台输出的内容,进而获得音量的大小
InputStreamReader reader = new InputStreamReader(child.getInputStream());
char[] chr = new char[5];
reader.read(chr) ;
String s="";
for(int i=0;i<5;i++){
if(chr[i]>='0' && chr[i]<='9')
s+=chr[i];
}
//System.out.println(s);
Integer nVolume = new Integer(s);
seconds = nVolume.intValue();
child.waitFor();
//这一段小程序实现对VC创建程序的调用
}catch(Exception e1){e1.printStackTrace(); }
}
public void paint(Graphics g) {
//画图来实现百分比Tracker
Graphics2D g2 = (Graphics2D) g;
Dimension d = getSize();
g2.setBackground(background);
g2.clearRect(0, 0, d.width, d.height);
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g2.setColor(jfcBlue);
double tseconds = duration-seconds;
if (tseconds > 0.0) {
int num = 20;
int progress = (int) (tseconds / duration * num);
double hh = ((double) (d.height - 4) / (double) num);
double ww = (int)(d.width-4);
double x = 0.0;
for ( ; x < progress; x+=1.0) {
g2.fill(new Rectangle2D.Double(d.width-ww-2, x*hh+2, ww, hh));
g2.fill3DRect((int)(d.width-ww-2),(int) (x*hh+2),(int) ww, (int)hh,true);
}
g2.setColor(jfcDarkBlue);
for ( ; x < num; x+=1.0) {
g2.fill(new Rectangle2D.Double(d.width-ww-2, x*hh+2, ww, hh));
g2.fill3DRect((int)(d.width-ww-2),(int) (x*hh+2),(int) ww, (int)hh,true);
}
}
}
public void start() {
pbThread = new Thread(this);
pbThread.setName("PlaybackMonitor");
pbThread.start();
}
public void stop() {
if (pbThread != null) {
pbThread.interrupt();
}
pbThread = null;
}
public void run() {
while (pbThread != null) {
try {
pbThread.sleep(99);
} catch (Exception e) { break; }
repaint();
}
pbThread = null;
}
public void addVolume(){
changeVolume(false);
initVolume();
}
public void minusVolume(){
changeVolume(true);
initVolume();
}
//control sound volume.
private void changeVolume(boolean bIsMinus){
try{
Runtime rt = Runtime.getRuntime();
//Sound Control
mngPathTool tool = new mngPathTool();
String sexec;
if(bIsMinus)
sexec= tool.getCurPath()+ "\\binex\\VolumeControl.exe 2";
else
sexec= tool.getCurPath()+ "\\binex\\VolumeControl.exe 1";
rt.exec(sexec);
}catch(Exception e1){e1.printStackTrace(); }
}
} // End VolumeTracker