Question

我目前正在尝试创建《战舰》游戏。我遇到的问题是，当我选择“随机化”按钮时，我希望它可以将飞船放置在网格的随机部分。

例如，运输船将覆盖阵列中的5个JButton。如何在数组中随机选择5个彼此相邻的JButton？

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JButton;
import java.util.Random;

public class View
{
    private JFrame frame;
    private JPanel panel1;
    private JPanel panel2;
    private JButton grid1[][];
    private JButton randomize;
    private String[] alphabet = { "", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J" };
    private String[] numbers = { "", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10" };

    public View()
    {
        configureFrame();
        configurePanels();
        configureComponents();
        frame.setVisible(true);
    }
    private void configureFrame()
    {
        frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(900, 600);
        frame.setResizable(false);
        frame.setLocationRelativeTo(null);
    }
    private void configurePanels()
    {
        panel1 = new JPanel();
        panel1.setLayout(new GridLayout(11, 11));
        frame.getContentPane().add(panel1, BorderLayout.WEST);

        panel2 = new JPanel();
        panel2.setSize(frame.getWidth(), frame.getHeight());
        panel2.setLayout(null);
        frame.getContentPane().add(panel2);
    }

    private void configureComponents()
    {
        grid1 = new JButton[11][11];
        for(int i = 0; i < grid1.length; i++)
        {
            for(int j = 0; j < grid1[i].length; j++)
            {
                grid1[i][j] = new JButton();
                panel1.add(grid1[i][j]);
            }
        }
        for(int i = 0; i < alphabet.length && i < numbers.length; i++)
        {
            grid1[0][i].setText(alphabet[i]);
            grid1[i][0].setText(numbers[i]);
            grid1[0][i].setFont(new Font("Tahoma", Font.BOLD, 19));
            grid1[i][0].setFont(new Font("Tahoma", Font.BOLD, 19));
            grid1[0][i].setEnabled(false);
            grid1[i][0].setEnabled(false);
            grid1[0][i].setBackground(Color.BLACK);
            grid1[i][0].setBackground(Color.BLACK);
        }
        grid1[0][0].setBackground(Color.BLACK);

        randomize = new JButton("Randomize");
        randomize.setLocation(50, 65);
        randomize.setSize(100, 50);
        randomize.setFocusPainted(false);
        randomize.addMouseListener(new MouseAdapter()
        {
            @Override
            public void mouseClicked(MouseEvent e)
            {
                /*
                        Want to randomly put the carrier on the grid somewhere
                grid1[2][3].setBackground(Color.LIGHT_GRAY);
                grid1[3][3].setBackground(Color.LIGHT_GRAY);
                grid1[4][3].setBackground(Color.LIGHT_GRAY);
                grid1[5][3].setBackground(Color.LIGHT_GRAY);
                grid1[6][3].setBackground(Color.LIGHT_GRAY);
                */
            }
        });
        panel2.add(randomize);
    }
}

我对Java还是很陌生，所以如果我没有任何道理，我会提前道歉。

Answer 1

如何在数组中随机选择5个彼此相邻的JButton？

您生成第一个坐标
随机决定要垂直放置还是水平放置
然后在该方向上添加+4（当前和4个额外的单元格）。
如果要放置的这5个新单元中的任何一个已经包含船，则重复此过程。

随机更改数组中JButton的背景？

1 个答案: