JAVA: I have a working GUI for a game, but would like to create a radnom number generator to play as player 2/red pieces. I am tracking the moves in the background with a 2D array and could create a random number generator for that, but I cant figure out how to apply that to a GUI. How can I have a computer player 2/red and have it's moves autofilled into the GUI? Currently this is working as a player vs player where you have to click the col button to drop a piece. Thanks!

import javafx.application.Application; import static javafx.application.Application.launch; import javafx.event.ActionEvent; import javafx.geometry.Insets; import javafx.geometry.Pos; import javafx.scene.layout.GridPane; import javafx.scene.shape.Rectangle; import javafx.scene.shape.Shape; import javafx.stage.Stage; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.event.EventHandler; import javafx.scene.paint.Color; import javafx.scene.shape.Circle;

public class Grid extends Application {

private static final int TILE_SIZE = 80; private static final int COLUMNS = 7; private static int ROWS = 7;

private static Circle circles[][];

// instance for each 7 columns in array. starts at bottom private static int row1 = 6; private static int row2 = 6; private static int row3 = 6; private static int row4 = 6; private static int row5 = 6; private static int row6 = 6; private static int row7 = 6;

// determines total number of possible moves protected static int count = 42;

// instance to determine who's move it is protected static int determinePlayer = 0;

//create array private static char[][] objArray;

public static void main(String[] args) {

launch(args); }

public Grid() { objArray = new char[7][7]; } // end of constructor

/** * Accessor for elements of object Connect 4 * * @param row row value * @param col column value * @return element from objects row/column */ public char getElement(int row, int col) { return objArray[row][col]; } // end of accessor getElement

/** * Mutator that adds game pieces to Connect4 2D array * * @param row row value * @param col column value * @param value element to be added to object */ public void setElement(int row, int col, char value) { objArray[row][col] = value; } // end of mutator setElement

public void fillColumn(int col) {

for (int i = ROWS - 2; i >= 0; i--) {

Circle c = circles[i][col]; if ((Color) c.getFill() == Color.WHITE) {

if (determinePlayer % 2 == 0) {

c.setFill(Color.BLUE); } else {

c.setFill(Color.RED); }

return; } } }

@Override public void start(Stage primaryStage) {

Grid matrix = new Grid();

Button bt[] = new Button[COLUMNS];

for (int i = 0; i < bt.length; i++) { bt[i] = new Button("Col " + (i + 1)); bt[i].setMaxSize(TILE_SIZE, TILE_SIZE); bt[i].setShape(new Circle(1.5));

// set button position bt[i].setTranslateX(TILE_SIZE / 4 + i * (TILE_SIZE + 5)); bt[i].setTranslateY(-260); }

// Action Events bt[0].setOnAction(new EventHandler() { @Override // Override the handle method public void handle(ActionEvent e) { String label = ((Button) e.getSource()).getText(); System.out.println(label);

// column are from 1 to COLUMN, while index is from 0 // hence subtracting 1 fillColumn(Integer.parseInt(label.split(" ")[1]) - 1); if (!columnSpace(1)) { System.out.println("No more column Space"); } else { matrix.add(1); }

} });

bt[1].setOnAction(new EventHandler() { @Override // Override the handle method public void handle(ActionEvent e) { String label = ((Button) e.getSource()).getText(); System.out.println(label);

// column are from 1 to COLUMN, while index is from 0 // hence subtracting 1 fillColumn(Integer.parseInt(label.split(" ")[1]) - 1); if (!columnSpace(2)) { System.out.println("No more column Space"); } else { matrix.add(2); } } });

bt[2].setOnAction(new EventHandler() { @Override // Override the handle method public void handle(ActionEvent e) { String label = ((Button) e.getSource()).getText(); System.out.println(label);

// column are from 1 to COLUMN, while index is from 0 // hence subtracting 1 fillColumn(Integer.parseInt(label.split(" ")[1]) - 1); if (!columnSpace(3)) { System.out.println("No more column Space"); } else { matrix.add(3); } } });

bt[3].setOnAction(new EventHandler() { @Override // Override the handle method public void handle(ActionEvent e) { String label = ((Button) e.getSource()).getText(); System.out.println(label);

// column are from 1 to COLUMN, while index is from 0 // hence subtracting 1 fillColumn(Integer.parseInt(label.split(" ")[1]) - 1); if (!columnSpace(4)) { System.out.println("No more column Space"); } else { matrix.add(4); } } });

bt[4].setOnAction(new EventHandler() { @Override // Override the handle method public void handle(ActionEvent e) { String label = ((Button) e.getSource()).getText(); System.out.println(label);

// column are from 1 to COLUMN, while index is from 0 // hence subtracting 1 fillColumn(Integer.parseInt(label.split(" ")[1]) - 1); if (!columnSpace(5)) { System.out.println("No more column Space"); } else { matrix.add(5); } } });

bt[5].setOnAction(new EventHandler() { @Override // Override the handle method public void handle(ActionEvent e) { String label = ((Button) e.getSource()).getText(); System.out.println(label);

// column are from 1 to COLUMN, while index is from 0 // hence subtracting 1 fillColumn(Integer.parseInt(label.split(" ")[1]) - 1); if (!columnSpace(6)) { System.out.println("No more column Space"); } else { matrix.add(6); } } });

bt[6].setOnAction(new EventHandler() { @Override // Override the handle method public void handle(ActionEvent e) { String label = ((Button) e.getSource()).getText(); System.out.println(label);

// column are from 1 to COLUMN, while index is from 0 // hence subtracting 1 fillColumn(Integer.parseInt(label.split(" ")[1]) - 1); if (!columnSpace(7)) { System.out.println("No more column Space"); } else { matrix.add(7); } } });

// Create rectangle grid Shape shape = new Rectangle((COLUMNS + 1) * TILE_SIZE, (ROWS + 1) * TILE_SIZE);

// create GridPane GridPane pane = new GridPane();

pane.setAlignment(Pos.CENTER);

pane.setPadding(new Insets(11.5, 12.5, 13.5, 14.5)); // pixel buffer layout pane.setHgap(5.5); // pixel per blocks pane.setVgap(5.5);

// add everything to gridpane pane.getChildren().addAll(shape); pane.getChildren().addAll(bt);

circles = new Circle[ROWS - 1][COLUMNS];

for (int i = 0; i < ROWS - 1; i++) { for (int i2 = 0; i2 < COLUMNS; i2++) { Circle circle = new Circle(TILE_SIZE / 2); circle.setCenterX(TILE_SIZE / 2); circle.setCenterY(TILE_SIZE / 2); circle.setTranslateX(i2 * (TILE_SIZE + 5) + TILE_SIZE / 4); circle.setTranslateY(-20 + (i - 2) * (TILE_SIZE + 5) + TILE_SIZE / 4);

circle.setFill(Color.WHITE); pane.getChildren().add(circle);

circles[i][i2] = circle; } }

Scene scene = new Scene(pane);

primaryStage.setTitle("GridPane"); // Set the stage title primaryStage.setScene(scene); // Place the scene in the stage

primaryStage.show(); // Display the stage }

public void add(int x) {

switch (x) { case 1: if (determinePlayer % 2 == 0) {

setElement(row1, 0, 'X'); } else {

setElement(row1, 0, 'O'); } row1--; count--; determinePlayer++; break;

case 2: if (determinePlayer % 2 == 0) {

setElement(row2, 1, 'X'); } else { setElement(row2, 1, 'O'); } row2--; count--; determinePlayer++; break;

case 3: if (determinePlayer % 2 == 0) { setElement(row3, 2, 'X'); } else { setElement(row3, 2, 'O'); } row3--; count--; determinePlayer++; break;

case 4: if (determinePlayer % 2 == 0) { setElement(row4, 3, 'X'); } else { setElement(row4, 3, 'O'); } row4--; count--; determinePlayer++; break;

case 5: if (determinePlayer % 2 == 0) { setElement(row5, 4, 'X'); } else { setElement(row5, 4, 'O'); } row5--; count--; determinePlayer++; break;

case 6: if (determinePlayer % 2 == 0) { setElement(row6, 5, 'X'); } else { setElement(row6, 5, 'O'); } row6--; count--; determinePlayer++; break;

case 7: if (determinePlayer % 2 == 0) { setElement(row7, 6, 'X'); } else { setElement(row7, 6, 'O'); } row7--; count--; determinePlayer++; break; } // end of switch } // end of

public static boolean columnSpace(int choice) {

if (choice == 1 && row1 < 1) { return false; } else if (choice == 2 && row2 < 1) { return false; } else if (choice == 3 && row3 < 1) { return false; } else if (choice == 4 && row4 < 1) { return false; } else if (choice == 5 && row5 < 1) { return false; } else if (choice == 6 && row6 < 1) { return false; } else if (choice == 7 && row7 < 1) { return false; } else { return true; } // if not false then true there is spcae }

}