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HarryDulaneyHarryDulaney
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Add Ex 16 09 and Ex 22 10
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8 files changed

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‎ch_09/exercise09_09/RegularPolygon.java

+4-4
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@@ -18,10 +18,10 @@
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* setSide(side: double) :void |
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* getNumSides(): double |
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* setNumSides(numSides:int) :void |
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* setX(newX:int) :void |
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* getX(): double |
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* setY(newY:int) :void |
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* getY(): double |
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* setCenterX(newX:int) :void |
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* getCenterX(): double |
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* setTopLeftY(newY:int) :void |
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* getCenterY(): double |
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* getPerimeter() |
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* getArea() : double |
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* |

‎ch_09/exercise09_11/LinearEquation.java

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* getE(): void |
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* getF(): void |
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* isSolvable(): boolean |
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* getX(): double |
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* getY(): double |
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* getCenterX(): double |
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* getCenterY(): double |
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* |
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*______________________________________________________________________________*/
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@@ -43,7 +43,7 @@
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* A method named isSolvable() that returns true if ad minus bc is not 0.
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* <p>
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* <p>
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* Methods getX() and getY() that return the solution for the equation.
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* Methods getCenterX() and getCenterY() that return the solution for the equation.
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* <p>
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* Draw the UML diagram for the class and then implement the class.
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*/

‎ch_10/exercise10_04/MyPoint.java

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@@ -16,9 +16,9 @@
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* +distance(int,int):double |
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* |
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* |
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* +getX() : int |
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* +getCenterX() : int |
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* |
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* +getY() : int |
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* +getCenterY() : int |
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* |
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* |
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*__________________________________________________________________| */

‎ch_16/exercise16_09/Exercise16_09.java

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package ch_16.exercise16_09;
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import javafx.application.Application;
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import javafx.geometry.Pos;
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import javafx.scene.Scene;
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import javafx.scene.control.Button;
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import javafx.scene.control.Label;
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import javafx.scene.control.TextField;
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import javafx.scene.layout.GridPane;
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import javafx.scene.layout.HBox;
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import javafx.scene.layout.Pane;
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import javafx.scene.layout.VBox;
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import javafx.scene.paint.Color;
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import javafx.scene.shape.Rectangle;
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import javafx.scene.text.Text;
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import javafx.stage.Stage;
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/**
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* **16.9 (Geometry: two rectangles intersect?) Write a program that enables the user to
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* specify the location and size of the rectangles and displays whether the two rectangles intersect,
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* as shown in Figure 16.39b. Enable the user to point the mouse
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* inside a rectangle and drag it. As the rectangle is being dragged, the rectangle’s
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* center coordinates in the text fields are updated.
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*/
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public class Exercise16_09 extends Application {
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private RectangleExt rectangle1;
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private RectangleExt rectangle2;
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private Rectangle layoutRect;
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private Pane drawPane;
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private TextField r1centerXTextField;
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private TextField r1centerYTextField;
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private TextField r1WidthTextField;
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private TextField r1HeightTextField;
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private TextField r2centerXTextField;
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private TextField r2centerYTextField;
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private TextField r2WidthTextField;
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private TextField r2HeightTextField;
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@Override
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public void start(Stage primaryStage) {
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layoutRect = new Rectangle(0, 0, 250, 110);
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layoutRect.setStroke(Color.WHITE);
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layoutRect.setFill(Color.WHITE);
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rectangle1 = new RectangleExt(52.0, 60.0, Color.WHITE);
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rectangle1.setTopLeft(new Pt(200, 10));
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rectangle1.setStroke(Color.BLACK);
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rectangle2 = new RectangleExt(80.0, 56.0, Color.WHITE);
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rectangle2.setStroke(Color.BLACK);
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rectangle2.setTopLeft(new Pt(60, 10));
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drawPane = new Pane(layoutRect, rectangle1, rectangle2);
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r1centerXTextField = new TextField();
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r2centerXTextField = new TextField();
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r1centerYTextField = new TextField();
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r2centerYTextField = new TextField();
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r1WidthTextField = new TextField();
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r1HeightTextField = new TextField();
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r2WidthTextField = new TextField();
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r2HeightTextField = new TextField();
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r1centerXTextField.setPrefColumnCount(3);
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r1centerYTextField.setPrefColumnCount(3);
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r1HeightTextField.setPrefColumnCount(3);
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r2centerXTextField.setPrefColumnCount(3);
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r2centerYTextField.setPrefColumnCount(3);
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r2WidthTextField.setPrefColumnCount(3);
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r1centerXTextField.setText(String.valueOf(rectangle1.getCenter().getX()));
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r1centerYTextField.setText(String.valueOf(rectangle1.getCenter().getY()));
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r1WidthTextField.setText(String.valueOf(rectangle1.getWidth()));
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r1HeightTextField.setText(String.valueOf(rectangle1.getHeight()));
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r2centerXTextField.setText(String.valueOf(rectangle2.getCenter().getX()));
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r2centerYTextField.setText(String.valueOf(rectangle2.getCenter().getY()));
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r2WidthTextField.setText(String.valueOf(rectangle2.getWidth()));
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r2HeightTextField.setText(String.valueOf(rectangle2.getHeight()));
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VBox paneForTable1 = getInputGrid(r1centerXTextField,
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r1centerYTextField, r1WidthTextField, r1HeightTextField, 1);
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VBox paneForTable2 = getInputGrid(r2centerXTextField,
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r2centerYTextField, r2WidthTextField, r2HeightTextField, 2);
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HBox paneForTables = new HBox(5);
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paneForTables.setAlignment(Pos.CENTER);
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paneForTables.getChildren().addAll(paneForTable1, paneForTable2);
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Button redrawButton = new Button("Redraw Rectangles");
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VBox vBox = new VBox();
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vBox.setAlignment(Pos.CENTER);
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vBox.getChildren().addAll(intersect(), drawPane,
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paneForTables, redrawButton);
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redrawButton.setOnAction(e -> {
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draw();
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vBox.getChildren().remove(0);
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vBox.getChildren().add(0, intersect());
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});
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rectangle1.setOnMouseDragged(e -> {
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rectangle1.setTopLeft(new Pt(e.getX(), e.getY()));
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r1centerXTextField.setText(String.valueOf(rectangle1.getCenter().getX()));
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r1centerYTextField.setText(String.valueOf(rectangle1.getCenter().getY()));
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vBox.getChildren().remove(0);
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vBox.getChildren().add(0, intersect());
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});
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rectangle2.setOnMouseDragged(e -> {
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rectangle2.setTopLeft(new Pt(e.getX(), e.getY()));
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r2centerXTextField.setText(String.valueOf(rectangle2.getCenter().getX()));
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r2centerYTextField.setText(String.valueOf(rectangle2.getCenter().getY()));
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vBox.getChildren().remove(0);
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vBox.getChildren().add(0, intersect());
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});
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Scene scene = new Scene(vBox);
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primaryStage.setTitle(getClass().getName());
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primaryStage.setScene(scene);
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primaryStage.show();
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vBox.widthProperty().addListener(ov ->
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layoutRect.widthProperty().bind(vBox.widthProperty())
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);
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vBox.heightProperty().addListener(ov ->
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layoutRect.heightProperty().bind(vBox.heightProperty().multiply(0.5))
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);
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vBox.heightProperty().addListener(ov ->
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layoutRect.heightProperty().bind(vBox.heightProperty().multiply(0.5))
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);
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layoutRect.setWidth(vBox.getWidth());
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layoutRect.setHeight(vBox.getHeight());
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}
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private Text intersect() {
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return new Text("Two rectangles intersect? " + checkIntersection());
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}
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String checkIntersection() {
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if (rectangle1.overlaps(rectangle2)) {
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return "Yes";
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}
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return "No";
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}
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protected VBox getInputGrid(
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TextField x,
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TextField y,
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TextField w,
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TextField h,
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int n) {
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VBox vBox = new VBox(1);
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GridPane gridPane = new GridPane();
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gridPane.setHgap(5);
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gridPane.setVgap(5);
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gridPane.add(new Label("Center X:"), 0, 0);
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gridPane.add(x, 1, 0);
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gridPane.add(new Label("Center Y:"), 0, 1);
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gridPane.add(y, 1, 1);
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gridPane.add(new Label("Width:"), 0, 2);
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gridPane.add(w, 1, 2);
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gridPane.add(new Label("Height:"), 0, 3);
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gridPane.add(h, 1, 3);
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vBox.getChildren().addAll(new Label("Enter rectangle " +
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n + " info:"), gridPane);
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return vBox;
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}
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private void draw() {
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double x1 = Double.parseDouble(r1centerXTextField.getText());
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if (x1 != rectangle1.getCenter().getX()) {
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rectangle1.setCenter(new Pt(x1, rectangle1.getCenter().getY()));
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}
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double y1 = Double.parseDouble(r1centerYTextField.getText());
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if (y1 != rectangle1.getCenter().getY()) {
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rectangle1.setCenter(new Pt(rectangle1.getCenter().getX(), y1));
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}
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double x2 = Double.parseDouble(r2centerXTextField.getText());
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if (x2 != rectangle2.getCenter().getX()) {
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rectangle2.setCenter(new Pt(x2, rectangle2.getCenter().getY()));
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}
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double y2 = Double.parseDouble(r2centerYTextField.getText());
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if (y2 != rectangle2.getCenter().getY()) {
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rectangle2.setCenter(new Pt(rectangle2.getCenter().getX(), y2));
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}
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double h1 = Double.parseDouble(r1HeightTextField.getText());
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if (h1 != rectangle1.getHeight()) {
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rectangle1.setHeight(h1);
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}
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double w1 = Double.parseDouble(r1WidthTextField.getText());
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if (w1 != rectangle1.getWidth()) {
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rectangle1.setWidth(w1);
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}
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double w2 = Double.parseDouble(r2WidthTextField.getText());
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if (w2 != rectangle2.getWidth()) {
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rectangle2.setWidth(w2);
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}
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double h2 = Double.parseDouble(r2HeightTextField.getText());
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if (h2 != rectangle2.getHeight()) {
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rectangle2.setHeight(h2);
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}
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}
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}

‎ch_16/exercise16_09/Intersectable.java

+8
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package ch_16.exercise16_09;
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import javafx.scene.text.Text;
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public interface Intersectable {
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Text intersect();
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}

‎ch_16/exercise16_09/Pt.java

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package ch_16.exercise16_09;
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public class Pt {
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private double x;
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private double y;
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public Pt() {
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x = 0;
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y = 0;
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}
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public Pt(double x, double y) {
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this.x = x;
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this.y = y;
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}
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public double distance(Pt point) {
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return distance(point.x, point.y);
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}
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public double distance(double x, double y) {
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return Math.sqrt(Math.pow(this.x - x, 2) + Math.pow(this.y - y, 2));
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}
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public double getX() {
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return x;
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}
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public double getY() {
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return y;
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}
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public void setX(double x) {
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this.x = x;
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}
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public void setY(double y) {
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this.y = y;
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}
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}

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