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import java.awt.Graphics;
import java.io.File;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.SourceDataLine;
public class Musicline extends javax.swing.JFrame implements Runnable{
private byte[] audioData=null;
private int intBytes = 0;
private byte[] ml=new byte[1];
private int[] drawl=null;
/** Creates new form Musicline */
public Musicline() {
initComponents();
Graphics g;
g=this.getGraphics();
}
public void paint(Graphics g)
{
g.clearRect(0,0,900,900);
//System.out.print(drawl.length);
if(audioData!=null)
{
drawl=new int[audioData.length];
for(int i=0;i<audioData.length;i++)
{
ml[0]=audioData;
//String s=new String(ml);
drawl=Math.abs((int)ml[0]);
}
System.out.println(drawl[0]);
for(int i=0;i<drawl.length-1;i++)
{
g.drawLine(i*this.getWidth()/256,drawl+100,(i+1)*this.getWidth()/256,drawl[i+1]+100);
}
}
}
public void run()
{
while(intBytes!=-1)
{
try {
synchronized(this){
this.wait(10);
}
} catch (InterruptedException ex) {
ex.printStackTrace();
}
repaint();
}
}
public void play()
{
try {
AudioInputStream ais = AudioSystem.getAudioInputStream(new File(
"E:/a.wav"));// 获得音频输入流
ais=AudioSystem.getAudioInputStream(AudioFormat.Encoding.PCM_SIGNED,ais);
AudioFormat baseFormat = ais.getFormat();// 指定声音流中特定数据安排
System.out.println("baseFormat="+baseFormat);
DataLine.Info info = new DataLine.Info(SourceDataLine.class,
baseFormat);
System.out.println("info="+info);
SourceDataLine line = (SourceDataLine) AudioSystem.getLine(info);
// 从混频器获得源数据行
System.out.println("line="+line);
line.open(baseFormat);// 打开具有指定格式的行，这样可使行获得所有所需的系统资源并变得可操作。
line.start();// 允许数据行执行数据 I/O
int BUFFER_SIZE = 256;
audioData = new byte[BUFFER_SIZE];
while (intBytes != -1) {
intBytes = ais.read(audioData, 0, BUFFER_SIZE);// 从音频流读取指定的最大数量的数据字节，并将其放入给定的字节数组中。
if (intBytes >= 0) {
int outBytes = line.write(audioData, 0, intBytes);// 通过此源数据行将音频数据写入混频器。
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
// <editor-fold defaultstate="collapsed" desc=" 生成的代码 ">
private void initComponents() {
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 400, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 300, Short.MAX_VALUE)
);
pack();
}// </editor-fold>
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
Musicline msl=new Musicline();
msl.setVisible(true);
Thread yh=new Thread(msl);
yh.start();
msl.play();
}
}
import java.awt.*;
import javax.swing.*;
public class Func extends JFrame{
/**
*<br>方法说明：主方法
*<br>输入参数：
*<br>返回类型：
*/
public static void main(String[] args){
Func db = new Func();
db.update();
}
/**
*<br>方法说明：构造器，显示窗体
*<br>输入参数：
*<br>返回类型：
*/
Func(){
super("Function");
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setSize(310,310);
show();
}
/**
*<br>方法说明：更新画面
*<br>输入参数：
*<br>返回类型：
*/
public void update(){
repaint();
}
/**
*<br>方法说明：转换坐标点
*<br>输入参数：
*<br>返回类型：
*/
double f(double x) {
return (Math.sin(2*x)+Math.cos(3*x));
}
/**
*<br>方法说明：绘制坐标图
*<br>输入参数：
*<br>返回类型：
*/
public void paint(Graphics g) {
double x0,x1,y0,y1,xd,yd;
double max=5.0;
int w,h,hw,hh;
//获取屏幕的尺寸
w=getSize().width;
h=getSize().height;
hw=w/2; hh=h/2;
//在屏幕上输出字符
g.drawString("Sin[2x]+Cos[3x]",10,40);
g.setColor(Color.red);
g.drawString("0",hw+5,hh+12);
g.drawString(""+max,hw-20,40);
g.drawString(""+max,w-20,hh+12);
//绘制X轴坐标
g.drawLine(0,hh,w,hh);
//绘制Y轴坐标
g.drawLine(hw,0,hw,h);
xd=2*max/w;//计算X增量
yd=hh/max; //计算y增量
g.setColor(Color.blue);
//使用增量绘制一小段线，最终组成曲线图形。
for (int x=0 ; x<w-1; x++) {
x0=-max+x*xd; y0=f(x0)*yd;
x1=x0+xd; y1=f(x1)*yd;
g.drawLine(x,(int)(hh-y0),x+1,(int)(hh-y1));
}
}
}