四子棋的棋盘共有6行7列，棋盘是垂直摆放，每名玩者有21只圆形棋子，以不同颜色辨别。两名玩者轮流每次把一只棋子放进棋盘任何未全满的一行中，棋子会占据一行中最底未被占据的位置。两名玩者任何一方先以四只棋子在横，竖或斜方向联成一条直线，便可获胜，游戏亦结束。假如棋盘已完全被棋子填满，但仍未有任何一方成功把四只棋子成一直线，则成为和局。
Core类
四子棋实体（二维数组）落子（每次落子都会判断胜负）判断胜负 public class Core { public int[][] core;//值为0不可操作；值为-1可操作；值为1红；值为2黑 public int player; public Core(int p){ core= new int[6][7];//六行七列 initCore(); player=p; } public void initCore(){ for(int col=0;col<7;col++){ core[5][col]=-1;//最后一行置-1 } } /** *落子 * @param col */ public int drop(int col){ int result=0; for(int row=5;row>=0;row--){ if(core[row][col]==-1){ core[row][col]=player; result=checkVictory(row,col); core[row-1][col]=-1;//这一列的上一行置为-1 if(player==1) player++; else player--; break;//drop好了就不用再继续了 } } return result; } /** *检查是否胜利 * @param row * @param col * @return 胜利返回player，没有胜利返回0 */ public int checkVictory(int row,int col){ int vertical=0;//纵向判断 for(int r=row-3;r<row+4;r++){ if(r<0||r>=6) continue; if(core[r][col]==player) vertical++; else vertical=0; if(vertical==4) return player; } int horizonal=0;//横向判断 for(int c=col-3;c<col+4;c++){ if(c<0||c>=7) continue; if(core[row][c]==player)horizonal++; else horizonal=0; if(horizonal==4) return player; } int diagonal1=0;//左上到右下 for(int r=row-3,c=col-3;r<row+4&&c<col+4;r++,c++){ if(r<0||c<0||r>=6||c>=7) continue; if(core[r][c]==player) diagonal1++; else diagonal1=0; if(diagonal1==4) return player; } int diagonal2=0;//左下到右上 for(int r=row+3,c=col-3;r>row-4&&c<col+4;r--,c++){ if(r<0||c<0||r>=6||c>=7) continue; if(core[r][c]==player) diagonal2++; else diagonal2=0; if(diagonal2==4) return player; } return 0; } }View类
继承自Pane类，包含四个布局：dropBox(HBox), board(Pane), vicText(VBox), toolBox(VBox)。落子以后在board上画有颜色的disc import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.geometry.Insets; import javafx.scene.control.Alert; import javafx.scene.control.Button; import javafx.scene.layout.Pane; import javafx.scene.layout.HBox; import javafx.scene.layout.VBox; import javafx.scene.paint.Color; import javafx.scene.shape.Circle; import javafx.scene.text.Text; public class View extends Pane{ private Core core; private Pane board=new Pane(); private HBox dropBox= new HBox(); private VBox vicText = new VBox(); private VBox toolBox=new VBox(); private int winner=0; public View(){ core=new Core(1); board.setLayoutX(0); board.setLayoutY(30); dropBox.setLayoutX(0); dropBox.setLayoutY(0); dropBox.setSpacing(10); dropBox.setPadding(new Insets(10,10,10,10)); vicText.setPadding(new Insets(10,10,10,10)); vicText.setSpacing(5); vicText.setLayoutX(520); vicText.setLayoutY(30); toolBox.setSpacing(10); toolBox.setLayoutX(500); toolBox.setLayoutY(350); toolBox.setPadding(new Insets(10,10,10,10)); drawPlainDisc(); drawDropButton(); drawToolButton(); this.getChildren().addAll(board,dropBox,vicText,toolBox); } private void drawPlainDisc() { //画board上的圈圈 for (int r = 0; r < 6; r++) { for (int c = 0; c < 7; c++) { Circle circle = new Circle(); circle.setRadius(30); circle.setCenterY(10 * (r + 1) + 30 * (2 * r + 1)); circle.setCenterX(10 * (c + 1) + 30 * (2 * c + 1)); circle.setStroke(Color.BLACK); circle.setFill(Color.WHITE); board.getChildren().add(circle); } } } private void drawDropButton(){ //画drop的button for(int i=0;i<7;i++){ Button btdrop=new Button("DROP"); btdrop.setPrefSize(60,20); final int iCol=i;//当所在的方法的形参需要被内部类里面使用时，该形参必须为final btdrop.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent event){ for(int r=5;r>=0;r--){ if(core.core[r][iCol]==-1) { drawDisc(r, iCol); winner=core.drop(iCol); break; } } //winner!=0的情况下，drawDisc(r,iCol)虽然调用了但是未显示。我不知道怎么回事QAQ; if(winner!=0){ if(winner==1){ Text redwins = new Text("Red Wins!"); vicText.getChildren().add(redwins); }else if(winner==2){ Text blackwins = new Text("Black Wins!"); vicText.getChildren().add(blackwins); } board.getChildren().clear(); drawPlainDisc(); core=new Core(1); } } }); dropBox.getChildren().add(btdrop); } } private void drawToolButton(){ Button restart=new Button("RESTART"); restart.setPrefSize(100,30); restart.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent event) { board.getChildren().clear(); drawPlainDisc(); core=new Core(1); } }); Button help=new Button("HELP"); help.setPrefSize(100,30); help.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent event) { Alert help = new Alert(Alert.AlertType.INFORMATION); help.setHeaderText("Rules and Cautions"); help.setTitle("Help"); help.setContentText( "Connect 4 is a two-player connection game in which the players take turns dropping colored discs from the top into the board.\n" + "The discs fall straight down, occupying the lowest available space within the column. \n" + "The objective of the game is to be the first to form a horizontal, vertical, or diagonal line of four of one's own discs.\n\n"+ "Code by TreepoBear.\n"+ "You can connect me through VX:cynthia9375 if you want."); help.showAndWait(); } }); toolBox.getChildren().addAll(restart,help); } private void drawDisc(int row,int col) { Circle disc=new Circle(); disc.setCenterY(10*(row+1)+30*(2*row+1)); disc.setCenterX(10*(col+1)+30*(2*col+1)); disc.setRadius(30); if(core.player==1) disc.setFill(Color.RED); else if(core.player==2) disc.setFill(Color.BLACK); board.getChildren().add(disc); } }Window类
.Application是JavaFX程序的入口，任何javafx应用程序程序都要继承该类并重写start()方法。通过main()执行Application的launch(String str)方法。launch(String str)方法会默认执行本类下的init()、start()、stop()方法。 import javafx.application.*; import javafx.scene.Scene; import javafx.stage.Stage; public class Window extends Application{ @Override public void start(Stage primaryStage) throws Exception { Scene scene = new Scene(new View(),630,460); primaryStage.setTitle("Connect 4"); primaryStage.setScene(scene); primaryStage.show(); } public static void main(String[] args){ launch(args); } }问题：drop判断到胜利的情况下，drawDisc(虽然)被调用了但是没有显示在Pane上。
