Java - 将形状添加到框架

Question

我创建了一个 JFrame，然后创建了一个 JPanel 并设置了参数。我有一个名为 boardSquares 的 JPanel，其中每个方 block 稍后都会被着色。

一旦我尝试将检查器添加到棋盘上，棋盘颜色就会重新排列。

我曾多次尝试解决此问题，但没有成功。我也确信有更好的方法来做到这一点。下面是一些代码。感谢所有帮助!

    public void paintComponent(Graphics g)
    {
        g.setColor(Color.BLUE);
        g.fillOval(0, 0, 30, 30);
    }

    public static void checkerBoard()
    {
        for (int i = 0; i < 8; i++)
        {
            for (int j = 0; j < 8; j++)
            {
                boardSquares[i][j] = new JPanel();

                if ((i + j) % 2 == 0)
                {
                    boardSquares[i][j].setBackground(Color.BLACK);
                }
                else
                {
                    boardSquares[i][j].setBackground(Color.WHITE);
                }
                frameOne.add(boardSquares[i][j]);
            }
        }
    }

Answer 1

看这个例子https://www.javaworld.com/article/3014190/learn-java/checkers-anyone.html

我稍微升级了你的例子抱歉，我没有太多时间

import java.awt.*;
import javax.swing.*;
import javax.swing.border.Border;

import java.awt.Color;
import java.awt.Graphics;

public class Circle extends JPanel
{
public static JFrame frameOne = new JFrame("Frame 1");
public static Circle boardSquares[][] = new Circle[8][8];

public static void main(String[] args)
{
    checkerBoard();
    frameOne.setSize(new Dimension(400,400));
    frameOne.getContentPane().setLayout(new GridLayout(8,8,0,0));
    frameOne.setBackground(Color.BLACK);
    frameOne.setVisible(true);
    frameOne.setResizable(false);
    frameOne.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    boardSquares[1][1].setChecker(true);
}

private Color c;
private boolean checker;

public Circle(int i, int j) {
    super();
    //setBorder(new Border());
    //set
    if ((i + j) % 2 == 0)
    {
        c = Color.DARK_GRAY;

    }
    else
    {
        c = Color.WHITE;
    }
}

void setChecker(boolean ch) {
    checker = ch;
}

public static void checkerBoard()
{
    for (int i = 0; i < 8; i++)
    {
        for (int j = 0; j < 8; j++)
        {
            boardSquares[i][j] = new Circle(i, j);

            frameOne.add(boardSquares[i][j]);
        }
    }
}

public void paintComponent(Graphics g)
{
    g.setColor(c);
    g.fillRect(0, 0, 40, 40);
    if (checker) {
        g.setColor(Color.BLUE);
        g.fillOval(4, 4, 32, 32);
    }
}

}