Question

我已经使用Java创建了一个Checkers游戏界面，并将棋子放置在游戏板上的每个位置，但是目前，我无法将棋子从一个正方形移动到另一个正方形。

如何在棋盘游戏中移动跳棋？

以下是我的程序的屏幕截图： file：///home/stown/Pictures/Screenshot%20from%202019-08-28%2011-56-51.png

下面是我尝试过的源代码：

    /*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package chackergame;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;

/**
 *
 * @author wenda
 */
public class CheckerGame extends JFrame {


    private final int ROWS = 8;
    private final int COLL = 8;

    private final JPanel[][] square = new JPanel[8][8];
    private JPanel backgroundPanel;
    private final JLabel statusBar = new JLabel(" Red turn to play");
    private JLabel lbPieces = new JLabel();

    private boolean inDrag = false;

    public CheckerGame() {

        //Add a chess board to the Layered Pane 
        backgroundPanel = new JPanel();
        backgroundPanel.setLayout(new GridLayout(8, 8, 0, 0));

        add(backgroundPanel, BorderLayout.CENTER);
        add(statusBar, BorderLayout.SOUTH);


        createSquare();
        addPieces();

        setIconImage(PiecesIcon.iconGame.getImage());
        setTitle("Java Checkers");// set title game
        setSize(500, 500);

        //setResizable(false);
        setLocationRelativeTo(null);
        setLocationByPlatform(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);

    }

    public void createSquare() {
        for (int row = 0; row < ROWS; row++) {
            for (int col = 0; col < COLL; col++) {

                JPanel cell = new JPanel();
                if ((row + col) % 2 == 1) {
                    cell.setBackground(new Color(99, 164, 54));
                    // cell.setBackground(Color.BLACK);
                }

                if ((row + col) % 2 == 0) {
                    cell.setBackground(new Color(247, 235, 164));
                    // cell.setBackground(Color.WHITE);
                }
                square[row][col] = cell;
                backgroundPanel.add(square[row][col]);
            }
        }
    }

    /**
     * Add pieces to the board
     */
    private void addPieces() {

        for (int row = 0; row < ROWS; row++) {
            for (int col = 0; col < COLL; col++) {

                lbPieces = new JLabel();
                lbPieces.setHorizontalAlignment(SwingConstants.CENTER);
                //lb.setBorder(BorderFactory.createLineBorder(Color.LIGHT_GRAY, 1));

                if ((row + col) % 2 == 1) {
                    if (row < 3) {
                        lbPieces.setIcon(PiecesIcon.redPiece);
                    } else if (row > 4) {
                        lbPieces.setIcon(PiecesIcon.whitePiece);
                    }
                }

                square[row][col].setLayout(new BorderLayout());
                square[row][col].add(lbPieces, BorderLayout.CENTER);
            } // end of for col loop
        } // end of for row loop
    } // end of addPieces method 

    public class MouseInput extends MouseAdapter {


        @Override
        public void mousePressed(MouseEvent evt) {
        }

        @Override
        public void mouseReleased(MouseEvent evt) {

        }

        @Override
        public void mouseClicked(MouseEvent evt) {

        }

        @Override
        public void mouseDragged(MouseEvent evt) {

        }
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        new CheckerGame();
    }

}

Answer 1

基本问题是关于将组件（在这种情况下为List<String> list = Arrays.asList("hdfs://NNcluster/finalsnappy/2019/4/8291/table_8291_69_2019_04_01", "hdfs://NNcluster/finalsnappy/2019/4/8291/table_8291_69_2019_04_02"); list.forEach(fileName-> { SparkSession spark = get_spark_session();// gets spark session Dataset<Row> tmpDS = spark.read().format("parquet").load(fileName); tmpDS.show(); System.out.println(tmpDS.count()); });）从任何源容器（一个JLable）拖动到任何其他容器。
每个此类容器都可以是所拖动组件的来源，也可以是其放置目标。因此它需要同时支持。这样的JPanel在下面的JPanel类中实现。
为了编写这段代码，我从MadProgrammer's answer借来了，它显示了一个源和一个目标的解决方案。
它是一个文件mre：可以将整个代码复制粘贴到DragDropPane文件中并运行。它演示了如何在面板之间拖动LabelDnD.java。请注意以下注释：

JLabel

如何在棋盘游戏中移动跳棋？

1 个答案: