J2ME Program to Read the Contents of a File

J2ME Program to Read the Contents of a File

Code:

/*J2ME Program to Read the Contents of a File*/
import java.io.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class ReadFile extends MIDlet implements CommandListener
{
  private Display display;
  private Form form;
  private Command read, exit;
  private Alert alert;
  public ReadFile()
  {
    display = Display.getDisplay(this);
    read = new Command("Read", Command.SCREEN, 1);
    exit = new Command("Exit", Command.EXIT, 1);  
    form = new Form("Read File");
    form.addCommand(exit);
    form.addCommand(read);
    form.setCommandListener(this);
  }

  public void startApp()
  {
    display.setCurrent(form);
  }
  public void pauseApp()
 {}
  public void destroyApp(boolean unconditional)
  {
    notifyDestroyed();
  }
  public void commandAction(Command c, Displayable s)
{
    String label = c.getLabel();
    if (label.equals("Read")){
      String string = file();
      if (string != null)
{
        alert = new Alert("Reading", string, null, null);
        alert.setTimeout(Alert.FOREVER);
        display.setCurrent(alert, form);
      }
    } else if (label.equals("Exit")){
      destroyApp(false);
    }
  }
  private String file()
{
    InputStream is = getClass().getResourceAsStream("help.txt");
    StringBuffer sb = new StringBuffer();
    try{
      int chars, i = 0;
      while ((chars = is.read()) != -1){
        sb.append((char) chars);
      }
      return sb.toString();
    }
catch (Exception e)
 {}
    return null;
}
}

Sample Output

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