Java制作Connect Four游戏面板 [英] Java making Connect Four game panel

问题描述

我将计算机科学课的Connect Four作为我的CPT.到目前为止，我已经创建了面板，但是遇到了问题.我要做的是在板上的每个插槽上制作一个面板，并用连接四块板上的空插槽的图片填充它，当每个点组合在一起时，看起来就像是一块完整的连接四块板上.基本上，我要在主面板中添加一个网格布局面板，并用包含插槽图片的其他多个面板填充该网格面板.我已经创建了一个子例程来执行此操作.但是，当我运行程序时，中间只会出现一个插槽，而不是应该显示的42个插槽(面板7乘6).我现在的目标是为我的子例程创建42个JPanel，并将它们放入我创建的网格面板中.我知道这可能没有多大意义，但希望代码能帮助您了解更多.感谢您的帮助.\

I'm making Connect Four for computer science class as my CPT. SO far I've created the panels but I am having an issue. What I am trying to do is make one panel per slot on the board and fill it with a picture of an empty slot of a connect four board, and when every spot is combined, it'll look like a complete connect four board. Basically I'm adding a grid layout panel to my main panel and filling the grid panel with multiple other panels containing the the slot picture. I've created a sub-routine to do so. But when I run my program, only one slot comes up in the middle, not the 42 that are supposed to show (the board is 7 by 6). My goal right now is to for my sub-routine to create 42 JPanels and put them into the grid panel I have created. I know this may not make a lot of sense but hopefully the code will help you understand more. Thanks for your help.\

P.S. emptyBox.jpg基本上是一张连接四板上的空插槽的图片.我想用这些填充面板，以便看起来像一个完整的面板.

P.S. emptyBox.jpg is basically a picture of an empty slot on a connect four board. I want to fill the panel up with these so it looks like a complete board.

这是到目前为止的代码:

Here's the code so far:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.io.*;

public class ConnectFour {

  static JFrame mainWindow;
  static JButton firstArrow = new JButton("Drop");
  static JButton secondArrow = new JButton("Drop");
  static JButton thirdArrow = new JButton("Drop");
  static JButton fourthArrow = new JButton("Drop");
  static JButton fifthArrow = new JButton("Drop");
  static JButton sixthArrow = new JButton("Drop");
  static JButton seventhArrow = new JButton("Drop");
  static JPanel[][] gridArray = new JPanel[6][7];
  static JLabel emptyLabel = new JLabel();
  static JPanel emptyPanel;
  static ImageIcon emptyBox;
  static JLabel redLabel = new JLabel();
  static JPanel redPanel;
  static ImageIcon redBox;
  static JLabel blackLabel = new JLabel();
  static JPanel blackPanel;
  static ImageIcon blackBox;


  public static void main(String[] args) {
    JPanel mainPanel = new JPanel();
    JPanel gridPanel = new JPanel();
    JPanel buttonPanel = new JPanel();

    mainPanel.setLayout(new BorderLayout());
    gridPanel.setLayout(new GridLayout(6, 7));
    buttonPanel.setLayout(new GridLayout(1, 7));
    mainPanel.setBackground(new Color(23, 13, 44));

    emptyBox = new ImageIcon("emptyBox.jpg"); 
    emptyLabel = new JLabel(emptyBox); 
    emptyPanel = new JPanel();
    emptyPanel.add(emptyLabel);

    mainPanel.add(gridPanel, BorderLayout.CENTER);
    mainPanel.add(buttonPanel, BorderLayout.NORTH);
    gridPanel.add(emptyPanel);

    buttonPanel.add(firstArrow);
    buttonPanel.add(secondArrow);
    buttonPanel.add(thirdArrow);
    buttonPanel.add(fourthArrow);
    buttonPanel.add(fifthArrow);
    buttonPanel.add(sixthArrow);
    buttonPanel.add(seventhArrow);

    mainWindow = new JFrame("Connect Four");
    mainWindow.setContentPane(mainPanel);
    mainWindow.setSize(846, 730);
    mainWindow.setLocationRelativeTo(null);
    mainWindow.setVisible(true);
    mainWindow.setResizable(false);

    fillGrid();
  }

  public static void fillGrid() {

    for(int j = 0; j < 6; j++) {
      for (int k = 0; k < 7; k++) {
        gridArray[j][k] = emptyPanel;

      }
    }
  }
}

推荐答案

我认为您想使用一个新的JPanel，而不是仅将其设置为空白面板.发生的情况是您试图将一个组件多次添加到父容器中，这是行不通的.一个组件只能一次添加.因此，您得到的结果是唯一添加了emptyPanel

I think you want to and a new JPanel instead of just making it = to the empty panel. What's happening is that you are trying to add one component to a parent containter multiple times, which won't work. A component can only be added once. So you the result you're getting, is the only the gridPanel slot being added an emptyPanel

public static void fillGrid() {
    for(int j = 0; j < 6; j++) {
      for (int k = 0; k < 7; k++) {
        gridArray[j][k] = new JPanel();
        gridArray[j][k].add(new Label(emptybox));
        gridPanel.add(gridArray[j][k]);

      }
    }
}

您还将想要移动gridPanel.add(emptyPanel);

对于重复性任务，您还可以做的是创建一个简单的帮助器方法

What you can also do, for repetitive tasks is create a simple helper method

private JPanel greateOnePanel(){
    JPanel panel = new JPanel();
    ImageIcon icon = new IMageIcon("emptybox.jpg"):
    JLabel label = new JLabale(icon);
    panel.add(label);

    return panel;
}

然后在您的循环中

public static void fillGrid() {
    for(int j = 0; j < 6; j++) {
      for (int k = 0; k < 7; k++) {
        gridPanel.add(createOnePanel());

      }
    }
}

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