?? listing 5-2.java
字號:
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class CheckColor extends MIDlet implements CommandListener
private Display display;
private Form form;
private TextBox textbox;
private Command exit;
public CheckColor()
{
display = Display.getDisplay(this);
exit = new Command("Exit", Command.SCREEN, 1);
String message=null;
if (display.isColor())
{
message="Color display.";
}
else
{
message="No color display";
}
textbox = new TextBox("Check Colors", message, 17, 0);
textbox.addCommand(exit);
textbox.setCommandListener(this);
}
public void startApp()
{
display.setCurrent(textbox);
}
public void pauseApp()
{
}
public void destroyApp(boolean unconditional)
{
}
public void commandAction(Command command,
Displayable displayable)
{
if (command == exit)
{
destroyApp(true);
notifyDestroyed();
}
}
}
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