Java Programing laungage

TextFieldTextField is an editable text component that may be placed into a Form. A TextField has a maximum size, which is the maximum number of characters that can be stored in the object at any time (its capacity).

TextField field= new TextField(label, text, maxSize, TextField.PASSWORD|TextField.NUMERIC);

label = display user define label.

text = display text into TextField.

TextField.PASSWORD|TextField.NUMERIC = This allow user to write NUMERIC value into text and value don't display into field.

SecretNumberText Program


/*
 * Save as a secretNumberText.java
 */
package r4r.Mobile.Basic;

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

/**
 * @author R4R
 */
public class secretNumberText extends MIDlet {

    /* -- Private Field -- */
    private Form form;
    private Display display;
    private TextField inputText;
    private Command exit;

    /* -- Default constructor -- */
    public secretNumberText() {
        display = Display.getDisplay(this);
        form = new Form("Add Secret Number Field into form");
        inputText = new TextField("Write some Number into TextField",
			"", 40, TextField.NUMERIC | TextField.PASSWORD);
        exit = new Command("EXIT", Command.EXIT, 1);

        //Add field into form
        form.append(inputText);
        form.addCommand(exit);
    }
				

    public void startApp() {
        form.setCommandListener(new CommandListener() {

            public void commandAction(Command c, Displayable d) {
                if (c == exit) {
                    destroyApp(true);
                    notifyDestroyed();
                }
            }
        });
        display.setCurrent(form);
    }

    public void pauseApp() {
    }

    public void destroyApp(boolean unconditional) {
    }
}