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.midlet.MIDlet;
 
 
public class CustomControl extends MIDlet implements CommandListener{
    //Main form.
 
    private Form form;
    private Display display;
    private Command exitCommand;
    private MyItem myItem;
 
    /**
     * Constructor. Constructs the object and initializes displayables.
     */
    public CustomControl() {
        form = new Form("Custom Control MIDlet.");
 
        // Add command buttons
        exitCommand = new Command("Exit", Command.EXIT, 1);
        form.addCommand(exitCommand);
        form.setCommandListener(this);
 
        display = Display.getDisplay(this);
        display.setCurrent(form);
 
        myItem = new MyItem("Custom control");
        form.append(myItem);
    }
 
    /**
     * From CommandListener.
     * Called by the system to indicate that a command has been invoked on a
     * particular displayable.
     * @param cmd the command that was invoked
     * @param displayable the displayable where the command was invoked
     */
    public void commandAction(Command cmd, Displayable displayable) {
        if (cmd == exitCommand) {
            notifyDestroyed();
        }
    }
 
    /**
     * From MIDlet.
     * Called when the MIDlet is started.
     */
    public void startApp() {
        // No implementation required.
    }
 
    /**
     * From MIDlet.
     * Called to signal the MIDlet to enter the Paused state.
     */
    public void pauseApp() {
        // No implementation required.
    }
 
    /**
     * From MIDlet.
     * Called to signal the MIDlet to terminate.
     * @param unconditional whether the MIDlet has to be unconditionally
     * terminated
     */
    public void destroyApp(boolean unconditional) {
        // No implementation required.
    }
}

import javax.microedition.lcdui.CustomItem;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;
 
class MyItem extends CustomItem {
    // Last key pressed code.
    private int key;
 
    /**
     * Constructor. 
     */
    public MyItem( String label ){
        super( "" );
    }
 
    /**
     * From CustomItem.
     * Called by the system to redraw canvas.
     * @param graphics used for drawing operations.
     */
    public void paint(Graphics g, int width, int height) {
        //Display last key pressed.
        String output = "Key code:"+String.valueOf(key);
 
        g.drawString(output,(width-g.getFont().stringWidth(output))/2, 
                            (height-g.getFont().getHeight())/2, 0);
 
        g.setStrokeStyle(Graphics.DOTTED);
        for (int i= 0;i<(height+width)/10;i++)
        {
            g.setColor(i*10000);
            g.drawRect( 0+i, 0+i, (width-i*2), (height-i*2));
        }
    }
 
    /**
     * From CustomItem.
     * Called by the system to retrieve minimum width required for this control.
     */
    protected int getMinContentWidth() {
        return 150;
    }
 
    /**
     * From CustomItem.
     * Called by the system to retrieve minimum height required for this control.
     */
    protected int getMinContentHeight() {
        return 100;
    }
 
    /**
     * From CustomItem.
     * Called by the system to retrieve preferred width for this control.
     */
    protected int getPrefContentWidth(int arg0) {
        return 200;
    }
 
    /**
     * From CustomItem.
     * Called by the system to retrieve preferred height for this control.
     */
    protected int getPrefContentHeight(int arg0) {
        return 100;
    }
 
    /**
     * From CustomItem.
     * Called by the system to redraw canvas.
     * @param graphics used for drawing operations.
     */
    protected void keyPressed(int keyCode) {
        key = keyCode;
        this.repaint();
    }
}