Java Quizzes With AngularJS

I played with AngularJS during the last couple of days and started to build a small application to test my Java knowledge. You can play with it too, here.

If you like it, please drop me a Java technical interview-like question in the comments below. I will include your question in the quizzes.

 The HTML source of the application is here, and its controller here.

 Let's have fun while studying Java!

Updating A JavaFX Component From A TimerTask Callback

	public class Controller implements BidListener{
	//Bid emulator
	private static BidEmulator bidEmulator;
	@FXML
	TextArea simulatorConsole;
	@FXML
	private void handleStartSimulationButtonClicked(ActionEvent ae){
	//Initialize bid emulator
	bidEmulator = new BidEmulator();
	//Register this class as a listener
	bidEmulator.addListener(this);
	//start bidding process emulation
	Timer timer = new Timer();
	timer.scheduleAtFixedRate(bidEmulator, 0, 100);
	}
	@Override
	public void bidEvent(Bid bid) {
	Platform.runLater(() -> simulatorConsole.setText(simulatorConsole.getText() +"Received a new bid!\n" ));
	}
	}

view raw gistfile1.java hosted with ❤ by GitHub

Simple JavaFX FXML Calculator Using Bindings

	package application;
	import javax.annotation.PostConstruct;
	import javafx.beans.binding.Bindings;
	import javafx.beans.binding.NumberBinding;
	import javafx.beans.property.DoubleProperty;
	import javafx.beans.property.SimpleDoubleProperty;
	import javafx.fxml.FXML;
	import javafx.scene.control.TextField;
	import javafx.util.StringConverter;
	import javafx.util.converter.DoubleStringConverter;
	public class CalculatorController{
	@FXML
	private TextField number1TextField;
	@FXML
	private TextField number2TextField;
	@FXML
	private TextField sumTextField;
	@FXML
	private TextField difTextField;
	@FXML
	private TextField multTextField;
	@FXML
	private TextField divTextField;
	// private NumberBinding sum, dif, mult, div;
	private DoubleProperty num1, num2, suma, dif, mult, div;
	// @PostConstruct
	@FXML
	private void initialize(){
	num1 = new SimpleDoubleProperty(1);
	num2 = new SimpleDoubleProperty(2);
	suma = new SimpleDoubleProperty();
	dif = new SimpleDoubleProperty();
	mult = new SimpleDoubleProperty();
	div = new SimpleDoubleProperty();
	suma.bind(num1.add(num2));
	dif.bind(num1.subtract(num2));
	mult.bind(num1.multiply(num2));
	div.bind(num1.divide(num2));
	StringConverter<? extends Number> converter = new DoubleStringConverter();
	Bindings.bindBidirectional(number1TextField.textProperty(), num1, (StringConverter<Number>)converter);
	Bindings.bindBidirectional(number2TextField.textProperty(), num2, (StringConverter<Number>)converter);
	Bindings.bindBidirectional(sumTextField.textProperty(), suma, (StringConverter<Number>)converter);
	Bindings.bindBidirectional(difTextField.textProperty(), dif, (StringConverter<Number>)converter);
	Bindings.bindBidirectional(multTextField.textProperty(), mult, (StringConverter<Number>)converter);
	Bindings.bindBidirectional(divTextField.textProperty(), div, (StringConverter<Number>)converter);
	}
	}

view raw MyFirstCalculatorJavaFXWithBindings hosted with ❤ by GitHub

Java SE 8 Stream API challenge from Java Magazine

	Look inside >
fix this

JavaServer Pages: Generating Dynamic Content - O'Reilly Media

JavaServer Pages: Generating Dynamic Content - O'Reilly Media

Rewriting The JavaFX Calculator Using Lambdas

	//create buttons
	Button seven = new Button("7");
	seven.setOnMouseClicked(e -> {
	displayField.setText(displayField.getText() + "7");
	});
	seven.setPrefWidth(PREF_BUTTON_WIDTH);
	moreButtons.add(seven,0,0);

view raw JavaFXCalculatorWLambdas hosted with ❤ by GitHub

Started doing my homework using JavaFX

Eventually I added a basic calculator engine to my JavaFX Calculator.

https://code.google.com/p/learn-javafx/source/browse/Calculator/AdvancedCalculator.java