Interfaces graphiques

  import java.awt.*;

  public class SimpleFrameMain {

      public static void main(String[] args) {
          SimpleFrame fenetre = new SimpleFrame();
      }
  }

  class SimpleFrame extends Frame {

      public SimpleFrame() {
          super("Test de fenêtre");
          this.setSize(400, 600);
          this.setVisible(true);
          this.add(new Label("hello"));
      }
  }

  import java.awt.*;

  class SimpleBorderLayout extends Frame {
      SimpleBorderLayout() {
          super("Fun Border layout");
          this.setSize(400, 600);

          // Configuration
          this.setLayout(new BorderLayout());
          this.setFont(new Font("Arial", Font.BOLD, 15));

          // Ajout d'éléments
          this.add(new Label("En haut"), BorderLayout.NORTH);
          this.add(new Label("En bas ..."), BorderLayout.SOUTH);

          Panel bluePanel = new Panel();
          bluePanel.setBackground(Color.BLUE);

          Panel redPanel = new Panel();
          redPanel.setBackground(Color.RED);

          this.add(bluePanel, BorderLayout.WEST);
          this.add(redPanel, BorderLayout.EAST);

          this.add(new Button("Click me !"));

          this.setVisible(true);
      }

      public static void main(String[] args) {
          new SimpleBorderLayout();
      }
  }

  import java.awt.*;

    class SimpleGridLayout extends Frame {
        SimpleGridLayout() {
            super("Super Grid Layout");
            this.setSize(400, 600);

            this.setLayout(new GridLayout(2, 2));
            Color[] colors = new Color[]{Color.BLUE, Color.BLACK, Color.ORANGE, Color.MAGENTA};

            for (Color color : colors) {
                Panel panel = new Panel();
                panel.setBackground(color);
                this.add(panel);
            }

            this.setVisible(true);
        }

      public static void main(String[] args) {
          new SimpleGridLayout();
      }
  }

  import java.awt.*;
  import java.awt.event.*;

  class SimpleEventFrame extends CloseableFrame {

      private final Label label;
      private int counter = 0;

      SimpleEventFrame() {
          super("Event listening");
          this.setSize(400, 600);

          setLayout(new BorderLayout());

          label = new Label("Et si on cliquait ?");
          label.setFont(new Font("Arial", Font.BOLD, 15));
          add(label, BorderLayout.NORTH);

          Button button = new Button("Cliquez moi !");
          button.addActionListener(new MyButtonListener(this));
          add(button, BorderLayout.CENTER);

          setVisible(true);
      }

      void incrementCounter() {
          label.setText(String.format("Vous avez cliqué %d fois", ++counter));
      }

      public static void main(String[] args) {
          new SimpleEventFrame();
      }
  }

  class MyButtonListener implements ActionListener {
      private SimpleEventFrame parent;

      MyButtonListener(SimpleEventFrame parent) {
          this.parent = parent;
      }

      @Override
      public void actionPerformed(ActionEvent actionEvent) {
          this.parent.incrementCounter();
      }
  }

  public class CloseableFrame extends Frame {
      public CloseableFrame(String title) {
          super(title);
          addWindowListener(new QuittingWindowListener());
      }
  }

  class QuittingWindowListener extends WindowAdapter {
      @Override
      public void windowClosing(WindowEvent windowEvent) {
          System.exit(0);
      }
  }

  import java.awt.*;
  import java.awt.event.*;

  class SimplePainter extends CloseableFrame {

      private final SimpleCanvas canvas;

      SimplePainter() {
          super("Let's Draw !");
          this.setSize(600, 600);

          canvas = new SimpleCanvas();
          canvas.setBackground(Color.WHITE);

          CanvasMouseMotionListener motionListener = new CanvasMouseMotionListener(canvas);
          canvas.addMouseMotionListener(motionListener);

          CanvasMouseListener mouseListener = new CanvasMouseListener(canvas);
          canvas.addMouseListener(mouseListener);

          this.add(canvas);
          this.setVisible(true);
      }

      public static void main(String[] args) {
          new SimplePainter();
      }
  }

  class SimpleCanvas extends Canvas {

      private Color paintColor = Color.BLUE;

      public void addPoint(int x, int y) {
          Graphics g = this.getGraphics();
          g.setColor(paintColor);
          g.fillRect(x, y, 3, 3);
      }

      public void toggleColor() {
          paintColor = paintColor == Color.BLUE ? Color.RED : Color.BLUE;
      }
  }

  class CanvasMouseMotionListener extends MouseMotionAdapter {

      private final SimpleCanvas canvas;

      CanvasMouseMotionListener(SimpleCanvas canvas) {
          this.canvas = canvas;
      }

      @Override
      public void mouseMoved(MouseEvent mouseEvent) {
          canvas.addPoint(mouseEvent.getX(), mouseEvent.getY());
      }
  }

  class CanvasMouseListener extends MouseAdapter {

      private final SimpleCanvas canvas;

      CanvasMouseListener(SimpleCanvas canvas) {
          this.canvas = canvas;
      }

      @Override
      public void mouseClicked(MouseEvent mouseEvent) {
          canvas.toggleColor();
      }
  }