Program Explanation Program: /*Import necessary packages into program*/ import javafx.animation.KeyFrame; import javafx.animation.Timeline; import javafx.application.Application; import javafx.geometry.Pos; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.control.Label; import javafx.scene.layout.BorderPane; import javafx.scene.layout.GridPane; import javafx.scene.paint.Color; import javafx.scene.shape.Circle; import javafx.stage.Stage; import javafx.util.Duration; //Class definition public class Exercise16_31 extends Application { /*Declaration of variable*/ private Cell[][] values = new Cell[6][7]; /*Declaration of "Timeline" object*/ private Timeline flash_anim = new Timeline( new KeyFrame(Duration.millis(400), e -> { setFourCellColor(); })); /*Declaration of "Label" object*/ private Label lblStatus = new Label(); /*Method definition*/ public void start(Stage primaryStage) { /*Set the cycle count of the animation*/ flash_anim.setCycleCount(Timeline.INDEFINITE); /*Declaration of "GridPane" object*/ GridPane pane_grid = new GridPane(); /*Define the properties for grid pane*/ pane_grid.setAlignment(Pos.CENTER); pane_grid.setHgap(5); pane_grid.setVgap(5); pane_grid.setStyle("-fx-background-color: green"); //Outer loop for (int i = 0; i < 6; i++) { //Inner loop for (int j = 0; j < 7; j++) { /*Initialize the values into array*/ values[i][j] = new Cell(i, j); //Call the method pane_grid.add(values[i][j], j, i); } } /*Define the object for "BorderPane"*/ BorderPane pane = new BorderPane(); /*Set the properties for BorderPane*/ pane.setBottom(lblStatus); BorderPane.setAlignment(lblStatus, Pos.CENTER); pane.setCenter(pane_grid); // Create a scene and place it in the stage Scene scene = new Scene(pane, 200, 200); primaryStage.setTitle("Exercise16_31"); primaryStage.setScene(scene); primaryStage.show(); } //Method definition private void startOver() { /*Declaration and initialization of variables*/ rDisc = 'R'; ans = null; //Outer loop for (int i = 0; i < values.length; i++) { //Inner loop for (int j = 0; j < values[i].length; j++) { /*Assign the token into variable*/ values[i][j].token = ' '; } } } /*Declaration and definition of variables*/ private char rDisc = 'R'; private int[][] ans; private Button btn_start = new Button("Start Over"); /*Class definition*/ class Cell extends Circle { /*Declaration and definition of class variables*/ char token = ' '; int i, j; boolean isFlashing; /*Definition of boolean method*/ private boolean available() { //Return statement with result return (token == ' ' && (i == 5 || values[i + 1][j].token != ' ')); } /*Constructor definition*/ public Cell(int i, int j) { /*Call the super class*/ super(10, 10, 20); /*Set the properties*/ this.setFill(Color.WHITE); this.setStroke(Color.BLACK); this.i = i; this.j = j; /*Set the method of "mousepressed" event*/ this.setOnMousePressed(e -> { //Condition if (ans != null) { //Return statement return; } //Condition if (available()) { token = rDisc; //Condition if (token == 'Y') { //Set the color this.setFill(Color.YELLOW); } //Condition else if (token == 'R') { //Set the color this.setFill(Color.RED); } //Call the function ans = isConsecutiveFour(values); //Condition if (ans != null) { flash_anim.play(); } //Condition else if (rDisc == 'R') { //Set the color rDisc = 'Y'; } //Condition else { //Set the color rDisc = 'R'; } // Check if there is a draw? if (isDraw()) { lblStatus.setText("A draw, no winner, start over"); startOver(); } } }); } } /*Method defintion*/ private boolean isDraw() { /*Outer loop*/ for (int i = 0; i < values.length; i++) { /*Inner loop*/ for (int j = 0; j < values[i].length; j++) { //Check the condition for null character if (values[i][j].token == ' ') { //Return statement return false; } } } //Return statement return true; } //Method definition public static int[][] isConsecutiveFour(Cell[][] grid) { /*Define the character values into variable "values"*/ char[][] values = new char[grid.length][grid[0].length]; //Outer loop for (int i = 0; i < grid.length; i++) { //Inner loop for (int j = 0; j < grid[i].length; j++) { /*Define grid values into "values" variable*/ values[i][j] = grid[i][j].token; } } //Return statement return isConsecutiveFour(values); } //Method definition public static int[][] isConsecutiveFour(char[][] values) { /*Declaration and definition of variables*/ int numberOfRows = values.length; int numberOfColumns = values[0].length; /*Loop to check the rows*/ for (int i = 0; i < numberOfRows; i++) { //Condition to check null value of text if (isConsecutiveFour(values[i]) != null) { /*Initialize the variable*/ int[][] ans = new int[4][2]; /*Assign values to variable*/ ans[0][0] = ans[1][0] = ans[2][0] = ans[3][0] = i; /*Call the method and store the result in a variable "k"*/ int k = isConsecutiveFour(values[i]); /*Assign the values into array variable "ans"*/ ans[0][1] = k; ans[1][1] = k + 1; ans[2][1] = k + 2; ans[3][1] = k + 3; //Return statement return ans; } } /*Loop to check the columns*/ for (int j = 0; j < numberOfColumns; j++) { /*Initialize the variable*/ char[] column = new char[numberOfRows]; //Get a column into an array for (int i = 0; i < numberOfRows; i++) { /*Initialize the values into the variable "column"*/ column[i] = values[i][j]; } //Condition to check null value of text if (isConsecutiveFour(column) != null) { /*Assign the values into array variable "ans"*/ int[][] ans = new int[4][2]; ans[0][1] = ans[1][1] = ans[2][1] = ans[3][1] = j; /*Call the method and store the result in a variable "k"*/ int k = isConsecutiveFour(column); /*Assign the values into array variable "ans"*/ ans[0][0] = k; ans[1][0] = k + 1; ans[2][0] = k + 2; ans[3][0] = k + 3; //Return statement return ans; } } /*Loop to check major diagonal (lower part)*/ for (int i = 0; i < numberOfRows - 3; i++) { /*Declare and initialize the variables*/ int nDiagonal = Math...

Introduction to Java Programming and Data Structures Comprehensive Version (11th Edition)

11th Edition

ISBN: 9780134700144

Author: Liang

Publisher: PEARSON

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Introduction to Java Programming and Data Structures Comprehensive Version (11th Edition)

Chapter 16.2, Problem 16.2.1CP Chapter 16.2, Problem 16.2.2CP Chapter 16.2, Problem 16.2.3CP Chapter 16.2, Problem 16.2.4CP Chapter 16.3, Problem 16.3.1CP Chapter 16.3, Problem 16.3.2CP Chapter 16.3, Problem 16.3.3CP Chapter 16.4, Problem 16.4.1CP Chapter 16.4, Problem 16.4.2CP Chapter 16.4, Problem 16.4.3CP

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