import java.io.IOException;
import java.io.InputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.StreamConnection;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
public class J2MEHttpExample extends MIDlet implements CommandListener {
private Command exit= new Command("Exit", Command.EXIT, 1), start= new Command("Start", Command.EXIT, 1);
private Display display;
private Form form = new Form("Customer Ranking");
public J2MEHttpExample() {
display = Display.getDisplay(this);
form.addCommand(exit);
form.addCommand(start);
form.setCommandListener(this);
}
public void startApp() throws MIDletStateChangeException {
display.setCurrent(form);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
}
public void commandAction(Command command, Displayable displayable) {
if (command == exit) {
destroyApp(false);
notifyDestroyed();
} else if (command == start) {
StreamConnection connection = null;
InputStream in = null;
StringBuffer buffer = new StringBuffer();
try {
connection = (StreamConnection) Connector.open("http://www.a.com/");
in = connection.openInputStream();
int ch;
while ((ch = in.read()) != -1) {
if (ch != '\n') {
buffer.append((char) ch);
} else {
String line = new String(buffer.toString());
if (line.equals("o")) {
int position = line.indexOf("alt=");
Alert alert = new Alert("Alert", line.substring(position + 5, position + 8), null,
null);
alert.setTimeout(Alert.FOREVER);
alert.setType(AlertType.ERROR);
display.setCurrent(alert);
}
buffer = new StringBuffer();
}
}
} catch (IOException error) {
Alert alert = new Alert("Error", "Cannot connect", null, null);
alert.setTimeout(Alert.FOREVER);
alert.setType(AlertType.ERROR);
display.setCurrent(alert);
}
}
}
}