java - 放置正确的光盘连接四java游戏与绘图面板

Question

我正在尝试使用用户输入和绘图面板用 Java 制作一个四子连棋游戏。两个人关闭回合，输入他们想要进入的列。我在制作时遇到了麻烦，因此已经放置的光盘在下一回合仍保留在板上(因为每次都会弹出一个新的绘图面板，其中包含更新的板) (我们尝试使用 GUI 但失败了)。我也很难关闭转弯并每次改变颜色。非常感谢，这就是我目前所掌握的。

import java.util.*;
import java.awt.*;

public class ConnectFour{
   public static void main(String[] args){
      Scanner console = new Scanner(System.in);
      char [][] board = new char [7][6];
      for (int i = 0; i< 7; i++){
         for (int j= 0; j< 6; j++){
            board[i][j] = ' '; 
         }
      }
      boolean isBlack = true ; //black discs turn
      boolean isRed = false ;   //red discs turn
      boolean playersTurn = true ;
      while (playersTurn){
         if (isBlack == true ){
            System.out.println("Black's Turn");
         }
         else {
            System.out.println("Red's Turn");
         }
         System.out.print("Choose a column to place your disk (1-7): ");

         int column = console.nextInt()-1;
         if (column < 0 || column > 7) { //while loop?
            System.out.print( "Column needs to be within 1-7"); //try catch?
         }

         drawBoard(column, board, isBlack, isRed);
         // connectedFour(board);
         // playersTurn = !playersTurn;
      }
      // isBlack = !isBlack; INVERT WHOSE TURN IT IS!!! unreachable statement??
   }

   public static void drawBoard(int column, char [][] board, boolean isBlack, boolean isRed) {
      DrawingPanel panel = new DrawingPanel(550,550);
      int rowAvailable;
      Graphics g = panel.getGraphics();
      g.drawLine(0,0,0,500);
      g.drawLine(0,0,500,0);
      g.drawLine(500,0,500,427);
      g.drawLine(0,427,500,427);

      for (int i = 0; i< 6; i++){
         for (int j= 0; j<= 6; j++){
            g.setColor(Color.YELLOW);
            g.fillRect(j*71,i*71,71,71);
            g.setColor(Color.WHITE);
            g.fillOval(j*71,i*71,71,71);
         }
      }

      int x = 0;
      int row = 5;

      while (board[column][row-x] != ' '){
         x++;
      }

      row = 5-x;

      if (isBlack == true) {
         g.setColor(Color.BLACK);  
         board[column][row-x] = 'b';                                                
      }                                                   
      else {
         g.setColor(Color.RED);
         board[column][row-x] = 'r';
      }
        // I KNOW THIS FOR LOOP DOES NOT WORK SUCCESSFULLY    
      for (int i = 0; i< 6; i++){                               
         for (int j= 0; j<= 6; j++){
            if(board[i][j] != 'b'){
               g.fillOval((i * 71),j*71, 71,71);
            }
         }
      }



         //       g.fillOval((column * 71),row*71, 71,71); //number 142 is just a test
                     //board[i][j] = WHOSE TURN IT IS (to update array)
          //  if(isBlack){
          //     board[column][row] = 'b';
         //   }
         //   else{
         //      board[column][row] = 'r';
          //  }
   }

   //get whose turn it is as parameter?? a color string? boolean?
   public static boolean  connectedFour( char[][] board){
      int verticalCount = 0;
      for (int i = 0; i< 6; i++){ //goes down each column //EXCEPTION HERE BECAUSE 0
         for( int j=0; j<=6; j++){
            if (board[i][j]== board[i-1][j]){
               verticalCount ++;
            }
         }
      }

      int horizontalCount = 0;
      for (int i =0; i<=6; i++){
         for (int j =0; j<6; j++){
            if (board[i][j-1] == board[i][j]){
               horizontalCount++;
            }
         }
      }

      int diagonalCount = 0;
      //get diagonal here
      if (verticalCount >= 4 || horizontalCount >= 4|| diagonalCount >=4){
         return true ; //return who the winner is. String?
      //
      }
      else {
         return false ;
      }
   }
}

Answer 1

• 不要将基于控制台的输入与 GUI 输出混合在一起，这是两种不同的用户范例，需要不同的工作流程和管理方法
• 不要使用getGraphics，这不是绘画的工作原理。 Swing 有一个定义的绘制过程，您应该使用它来确保在需要执行更新时收到通知。请参阅Painting in AWT and Swing和 Performing Custom Painting了解更多详情。

以下是一个非常基本的示例，说明如何使用该 API，而不是反对它。

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.RenderingHints;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.Ellipse2D;
import java.awt.geom.RoundRectangle2D;
import java.util.Observable;
import java.util.Observer;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.EmptyBorder;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class ConnectFour {

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

    public ConnectFour() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(new GamePane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public enum Player {

        RED, BLUE, NONE;
    }

    public class GamePane extends JPanel {

        private BoardPane boardPane;
        private JLabel label;
        private Player player = null;

        public GamePane() {
            setLayout(new BorderLayout());
            boardPane = new BoardPane();
            add(boardPane);

            label = new JLabel("...");
            label.setHorizontalAlignment(JLabel.CENTER);
            label.setForeground(Color.WHITE);
            label.setOpaque(true);
            label.setBorder(new EmptyBorder(10, 10, 10, 10));

            add(label, BorderLayout.NORTH);

            updatePlayer();

            boardPane.addChangeListener(new ChangeListener() {
                @Override
                public void stateChanged(ChangeEvent e) {
                    updatePlayer();
                }
            });
        }

        protected void updatePlayer() {
            String text = "...";
            Color color = null;
            if (player == null || player.equals(Player.BLUE)) {
                player = Player.RED;
                text = "Red";
                color = Color.RED;
            } else if (player.equals(Player.RED)) {
                player = Player.BLUE;
                text = "Blue";
                color = Color.BLUE;
            }

            label.setText(text);
            label.setBackground(color);
            boardPane.setPlayer(player);
        }

    }

    public class BoardPane extends JPanel {

        private Player[][] board;
        private Player player;

        private int hoverColumn = -1;

        public BoardPane() {
            board = new Player[8][8];
            for (int row = 0; row < board.length; row++) {
                for (int col = 0; col < board[row].length; col++) {
                    board[row][col] = Player.NONE;
                }
            }

            MouseAdapter mouseHandler = new MouseAdapter() {

                @Override
                public void mouseMoved(MouseEvent e) {
                    hoverColumn = getColumnAt(e.getPoint());
                    repaint();
                }

                @Override
                public void mouseExited(MouseEvent e) {
                    hoverColumn = -1;
                    repaint();
                }

                @Override
                public void mouseClicked(MouseEvent e) {
                    if (hoverColumn > -1) {
                        addPieceTo(hoverColumn);
                        repaint();
                    }
                }

            };

            addMouseMotionListener(mouseHandler);
            addMouseListener(mouseHandler);
        }

        public void addChangeListener(ChangeListener listener) {
            listenerList.add(ChangeListener.class, listener);
        }

        public void removeChangeListener(ChangeListener listener) {
            listenerList.add(ChangeListener.class, listener);
        }

        public void setPlayer(Player player) {
            this.player = player;
        }

        protected void addPieceTo(int col) {
            boolean added = false;
            if (col >= 0 && col < board[0].length) {
                for (int row = 0; row < board.length; row++) {
                    if (board[row][col] != Player.NONE) {
                        if (row >= 0) {
                            board[row - 1][col] = player;
                            added = true;
                        }
                        break;
                    }
                }
            }
            if (!added) {
                if (board[0][col] == Player.NONE) {
                    board[board.length - 1][col] = player;
                    added = true;
                }
            }
            if (added) {
                fireStateChanged();
            }
            repaint();
        }

        protected void fireStateChanged() {
            ChangeListener[] listeners = listenerList.getListeners(ChangeListener.class);
            if (listeners != null && listeners.length > 0) {
                ChangeEvent evt = new ChangeEvent(this);
                for (ChangeListener listener : listeners) {
                    listener.stateChanged(evt);
                }
            }
        }

        protected int getColumnAt(Point p) {

            int size = Math.min(getWidth() - 1, getHeight() - 1);

            int xOffset = (getWidth() - size) / 2;
            int yOffset = (getHeight() - size) / 2;

            int padding = getBoardPadding();

            int diameter = (size - (padding * 2)) / 8;

            int xPos = p.x - xOffset;
            int column = xPos / diameter;

            return Math.min(Math.max(0, column), board[0].length - 1);
        }

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(200, 200);
        }

        protected int getBoardPadding() {
            return 10;
        }

        @Override
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            Graphics2D g2d = (Graphics2D) g.create();
            g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
            g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
            g2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE);
            g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
            g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
            g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
            g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);

            int size = Math.min(getWidth() - 1, getHeight() - 1);

            int xOffset = (getWidth() - size) / 2;
            int yOffset = (getHeight() - size) / 2;

            g2d.fill(new RoundRectangle2D.Double(xOffset, yOffset, size, size, 20, 20));

            int padding = getBoardPadding();

            int diameter = (size - (padding * 2)) / 8;

            for (int row = 0; row < board.length; row++) {
                int yPos = (yOffset + padding) + (diameter * row);
                for (int col = 0; col < board[row].length; col++) {
                    int xPos = (xOffset + padding) + (diameter * col);
                    switch (board[row][col]) {
                        case RED:
                            g2d.setColor(Color.RED);
                            break;
                        case BLUE:
                            g2d.setColor(Color.BLUE);
                            break;
                        default:
                            g2d.setColor(getBackground());
                            break;
                    }
                    g2d.fill(new Ellipse2D.Double(xPos, yPos, diameter, diameter));
                }
            }

            if (hoverColumn > -1) {
                int yPos = (yOffset + padding) + (diameter * 0);
                int xPos = (xOffset + padding) + (diameter * hoverColumn);
                if (player != null) {
                    switch (player) {
                        case RED:
                            g2d.setColor(Color.RED);
                            break;
                        case BLUE:
                            g2d.setColor(Color.BLUE);
                            break;
                        default:
                            g2d.setColor(getBackground());
                            break;
                    }
                    g2d.fill(new Ellipse2D.Double(xPos, yPos, diameter, diameter));
                }

            }

            g2d.dispose();
        }

    }

}