lab

import java.awt.event.ActionEvent;

import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.*;
import javafx.stage.Stage;

public class CellPhone extends Application implements EventHandler<ActionEvent> {

	private Button keyPad[] = new Button[12];
	private TextField phone = new TextField();

	public void handle(ActionEvent e) {
		Button bt = (Button)e.getSource();
		String phone_entered = phone.getText();
		String newValue = phone_entered + bt.getText();
		phone.setText(newValue);
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Application.launch(args);

	}

	@Override
	public void start(Stage primarystage){

		phone.setPrefColumnCount(10);

		GridPane phonePad = new GridPane();
		phonePad.setPadding(new Insets (5,5,5,5));

		phonePad.setHgap(15);
		phonePad.setVgap(15);

		int k, row, col;

		for(k=1, row = 0; row < 3; row++) {
			for (col = 0; col<3; col++,k++) {
				keyPad[k] = new Button(""+k);
				phonePad.add(keyPad[k], col, row);

			}
		}

		keyPad[10] = new Button("*");
		keyPad[11] = new Button("#");
		keyPad[0] = new Button("0");

		phonePad.add(keyPad[10], 0, 3);
		phonePad.add(keyPad[0], 1, 3);
		phonePad.add(keyPad[11],2 , 3);

		for(k=0; k<keyPad.length;k++) {
			keyPad[k].setOnAction(this);
		}

		//create a border pane
		BorderPane pane = new BorderPane();
		pane.setCenter(phonePad);
		pane.setTop(phone);

		Scene scene = new Scene(pane, 80,180);
		primarystage.setTitle("Call");
		primarystage.setScene(scene);
		primarystage.show();

	}

}
/////////////////////////////////////////////////////////

Lab 6 pg 621 #15.1