j2me学习 J2me Wap Explorer

package org.fox.image;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.Image;
/**
* 类名：ImageHandler.java 编写日期: 2007-8-17
程序功能描述：
Demo:
*
Bug:
*
* 程序变更日期 ：
变更作者 ：
变更说明 ：
*
* @author wuhua rrq12345@163.com
*/
public class ImageHandler implements Runnable {
private HttpConnection c = null;
private InputStream is = null;
private ByteArrayOutputStream baos = new ByteArrayOutputStream();
private Image image = null;
private String iamgeUrl;
private ImageCanvas imageCanvas;
private ImagePart imagePart;
private ImageHandler(String imageUrl,ImagePart imagePart,ImageCanvas imageCanvas){
this.iamgeUrl = imageUrl;
this.imagePart = (ImagePart)imagePart;
this.imageCanvas = imageCanvas;
new Thread(this).start();
}
public static ImageHandler getIamgeHandler(String imageUrl,
ImagePart imagePart,ImageCanvas imageCanvas){
return new ImageHandler(imageUrl,imagePart,imageCanvas);
}
/* 获得网络图片 */
public Image handlerIamge() throws Exception{
byte[] imageData = null;
try {
c = (HttpConnection) Connector.open(iamgeUrl);
is = c.openInputStream();
int ch = 0;
while ((ch = is.read()) != -1) {
baos.write(ch); // 读取网络图片
}
} catch (IOException ioe) {
throw new IOException("Connect Error");
}
imageData = baos.toByteArray(); // 把图片转换成字节
try {
image = Image.createImage(imageData, 0, imageData.length);
} catch (NullPointerException e) {
throw new NullPointerException("NullPointerException");
} catch (IllegalArgumentException e) {
throw new IllegalArgumentException("IllegalArgumentException");
}
return image;
}
public void run() {
try {
imagePart.setImage(handlerIamge());
imageCanvas.repaint();
} catch (Exception e) {
e.printStackTrace();
}
}
}