I have used snippets of code from various sources to compile the following code:
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import java.util.Calendar;
public class ShowImage extends Panel {
static Calendar cal = Calendar.getInstance(); //gets system time
BufferedImage image;
private static final String holidaysimages[] = { //declares the image array
"santa.jpg", "valentine.jpg", "bunny.jpg", "bunny.jpg", "summer.jpg", "summer.jpg",
"summer.jpg", "summer.jpg", "turkey.jpg", "turkey.jpg", "turkey.jpg", "santa.jpg"};
private static final String holidayssounds[] = { //declares the sound array
"santa.wav", "valentine.wav", "easter.wav", "easter.wav", "summer.wav", "summer.wav",
"summer.wav", "summer.wav", "turkey.wav", "turkey.wav", "turkey.wav", "santa.wav"};
public ShowImage() throws Exception {
try {
String imageName= holidaysimages[cal.get(Calendar.MONTH)]; //uses the month to get the appropriate picture
File input = new File(imageName);
image = ImageIO.read(input);
} catch (IOException ie) {
System.out.println("Error:"+ie.getMessage()); //prints error message if the image does not exist
}
}
public void paint(Graphics g) {
g.drawImage( image, 0, 0, null); //displays the image
}
static public void main(String args[]) throws Exception {
JFrame frame = new JFrame("Happy Holidays");
Panel panel = new ShowImage();
frame.getContentPane().add(panel);
frame.setSize(500, 500); //sets frame size
frame.setVisible(true);
new AePlayWave(holidayssounds[cal.get(Calendar.MONTH)]).start(); //plays the sound
}
}
import java.io.File;
import java.io.IOException;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.UnsupportedAudioFileException;
public class AePlayWave extends Thread {
private String filename;
private Position curPosition;
private final int EXTERNAL_BUFFER_SIZE = 524288; // 128Kb
enum Position {
LEFT, RIGHT, NORMAL
};
public AePlayWave(String wavfile) {
filename = wavfile; //gets the file name from main
curPosition = Position.NORMAL;
}
public AePlayWave(String wavfile, Position p) {
filename = wavfile; //tells the system that the file is a wav file
curPosition = p;
}
public void run() {
File soundFile = new File(filename);
if (!soundFile.exists()) { //if the file is not found prints the error
System.err.println("Wave file not found: " + filename);
return;
}
AudioInputStream audioInputStream = null;
try {
audioInputStream = AudioSystem.getAudioInputStream(soundFile);
} catch (UnsupportedAudioFileException e1) {
e1.printStackTrace();
return;
} catch (IOException e1) {
e1.printStackTrace();
return;
}
AudioFormat format = audioInputStream.getFormat();
SourceDataLine auline = null;
DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
try {
auline = (SourceDataLine) AudioSystem.getLine(info);
auline.open(format);
} catch (LineUnavailableException e) {
e.printStackTrace();
return;
} catch (Exception e) {
e.printStackTrace();
return;
}
if (auline.isControlSupported(FloatControl.Type.PAN)) {
FloatControl pan = (FloatControl) auline
.getControl(FloatControl.Type.PAN);
if (curPosition == Position.RIGHT)
pan.setValue(1.0f);
else if (curPosition == Position.LEFT)
pan.setValue(-1.0f);
}
auline.start();
int nBytesRead = 0;
byte[] abData = new byte[EXTERNAL_BUFFER_SIZE];
try {
while (nBytesRead != -1) {
nBytesRead = audioInputStream.read(abData, 0, abData.length);
if (nBytesRead >= 0)
auline.write(abData, 0, nBytesRead);
}
} catch (IOException e) {
e.printStackTrace();
return;
} finally {
auline.drain();
auline.close();//closes the file
}
}
}
I realise it is quite a bit of code to look through but it would really help me a lot to understand this code. I only need help with the AePlayWav class because it is the more complicated class. I have included documentation for what I do understand but do not want to use any code that is above my level of knowledge. Any help in the documentation would help me a lot.
thanks,
Jaro