Question

当你按下其中一个JButton时，我的代码会设置一个6x6的JButton数组，弹出一个6x1 JDialog框，提供6种颜色选择。当其中一个被按下时，方块点击打开JDialog框改变颜色。

我想写一段代码，这样你就可以在任何行/列中只有一个方格的每种颜色。在minut中布尔我可以阻止你将相同的颜色设置为相同的方块（当你点击它时它会变成黑色，如果它是任何其他颜色）。

代码如下。任何帮助都感激不尽。感谢

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.sql.*;
public class Grid5 extends JFrame implements ActionListener
{
        private ColourChooser paintBox = null;
        public static final int ROW = 6;
        public static final int COLUMN = 6;
        private static Grid5 grid;
        public static final String defaultName = "Black";
        public JButton[][] buttons; //makes an array called buttons
        public static void main(String[] args)// sets up a 6x6 grid
        {
            int rows = 6;
            int cols = 6;
            int size = 600;
            Grid5 grid = new Grid5(rows, cols);
            grid.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            grid.setPreferredSize(new Dimension(size, size));
            grid.pack();
            grid.setLocationRelativeTo(null);
            grid.setVisible(true);
        }
        // main
        public Grid5(int rows, int cols) // makes the 6x6 main grid a grid of JButtons
        {
            int rowSize = 6;
            int colSize = 6;
            int gridSize = 600;
            buttons = new JButton[rowSize][colSize];
            Container pane = getContentPane();
            pane.setLayout(new GridLayout(rows, cols));
            for(int j =0; j < rows; j++){
                for (int i = 0; i < cols; i++) {
                    buttons[j][i] = new JButton("");
                    buttons[j][i].setOpaque(true);
                    buttons[j][i].setBackground(Color.BLACK);
                    buttons[j][i].setActionCommand(j + " " + i);
                    buttons[j][i].setName("Black");
                    buttons[j][i].addActionListener(this);
                    pane.add(buttons[j][i]);
                }
            }
        }               //end of grid constructor

        public void actionPerformed(ActionEvent e) 
        {
            JButton button = (JButton) e.getSource();
            if ( paintBox != null && paintBox.isShowing())//stops more than one paintBox from opening
                paintBox.dispose();
            if( e.getSource() instanceof JButton){
                ((JButton)e.getSource()).setBackground(Color.BLACK);
            } 

            int rows = 6;
            int cols = 1;
            int size = 300;
            paintBox = new ColourChooser(grid, false, button);
            paintBox.setPreferredSize(new Dimension(size/3, size));
            paintBox.pack();
            paintBox.setVisible(true);
        }
}

class ColourChooser extends JDialog
{ 
    private JButton fillRed = new JButton("Red");
    private JButton fillYellow = new JButton("Yellow");
    private JButton fillBlue = new JButton("Blue");
    private JButton fillGreen = new JButton("Green");
    private JButton fillPurple = new JButton("Purple");
    private JButton fillBrown = new JButton("Brown");
    private JButton[] paintButton = {fillRed,fillYellow,fillBlue,fillGreen,fillPurple,fillBrown};
    private Color[] colours = {Color.RED, Color.YELLOW, Color.BLUE, Color.GREEN, new Color(102, 0, 102), new Color(102, 51, 0)};
    private JButton buttonPress;

    private int buttonsLeftRow ;
    private int buttonsLeftColumn ;
    private int row,column;

    public ColourChooser(final Grid5 frame, boolean isModal, JButton button)
    {

        buttonPress = button;
        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(6, 1));
        for (int i = 0; i < paintButton.length; i++) {
            paintButton[i].setOpaque(true);
            paintButton[i].addActionListener(buttonAction);
            paintButton[i].setForeground(new Color(100,100,100));
            paintButton[i].setBackground(colours[i]);
            panel.add(paintButton[i]);
        }
        add(panel);
        pack();
    }
    private ActionListener buttonAction = new ActionListener()
    {
        public void actionPerformed(ActionEvent a)
        {
            JButton fill = (JButton) a.getSource(); 
            if(fill == fillRed){
                String colour = "Red";
                if(checkColoursRow(colour)){
                    buttonPress.setBackground(Color.RED);
                    buttonPress.setName("Red");
                    dispose();
                }
            }
            if(fill == fillYellow){
                String colour = "Yellow";
                if(checkColoursRow(colour)){
                    buttonPress.setBackground(Color.YELLOW);
                    buttonPress.setName("Yellow");
                    dispose();
                }
            }
            if(fill == fillBlue){
                String colour = "Blue";
                if(checkColoursRow(colour)){
                    buttonPress.setBackground(Color.BLUE);
                    buttonPress.setName("Blue");
                    dispose();
                }
            }
            if(fill == fillGreen){
                String colour = "Green";
                if(checkColoursRow(colour)){
                    buttonPress.setBackground(Color.GREEN);
                    buttonPress.setName("Green");
                    dispose();
                }
            }
            if(fill == fillPurple){
                String colour = "Purple";
                if(checkColoursRow(colour)){
                    buttonPress.setBackground(new Color(102, 0, 102));
                    buttonPress.setName("Purple");
                    dispose();
                }
            }
            if(fill.equals(fillBrown)){
                String colour = "Brown";
                if(checkColoursRow(colour)){
                    buttonPress.setBackground(new Color(102, 51, 0));
                    buttonPress.setName("Brown");
                    dispose();
                }
            } 
        }
    };

    private boolean checkColoursRow(String colour){
        String command = buttonPress.getActionCommand();
        String[] array = command.split(" ");
        int row = Integer.parseInt(array[0]);
         int column = Integer.parseInt(array[1]); 

        for(int i = 0; i<Grid5.COLUMN; i++){
            if (i != row)
            {
                if(buttonPress.getName().equals(colour))
                return false;   
            }
        }


        for (int i = 0; i  < Grid5.ROW; i++)
        {
            if (i != column)
            {
                if (buttonPress.getName().equals(colour))
                    return false;
            }   
        }
        return true;

        }
}

Answer 1

你几乎就在那里，只是有点遗失

第1步：您需要将当前初始化的Grid5对象的引用传递给ColorChooser。为此，请更改行

        paintBox = new ColourChooser(grid, false, button);

到

        paintBox = new ColourChooser(this, false, button);

因为变量grid从未初始化，this引用当前Grid5对象并且将被初始化。在Grid5中声明ColourChooser类型的变量as Grid5 frame;

第2步：在ColourChooser

的构造函数中

public ColourChooser(final Grid5 frame, boolean isModal, JButton button)

将参数框架分配给局部变量 this.frame = fame

这样，您可以在颜色选择器中引用Grid及其按钮

一旦完成，

第3步：在ColourChooser中使用类似的checkColoursRow行实现一种方法，以实现您的目标。 consider naming for methods that return boolean.总是好的。正如您可能注意到的那样，它提高了可读性并避免了混淆。

所以，一种方法可能就像（你可以改进下面的代码，为了清晰起见，我给出了详细的实现）：

private boolean hasColorInRowOrCol(String color){
    String command = buttonPress.getActionCommand();
    String[] array = command.split(" ");
    int row = Integer.parseInt(array[0]);
    int column = Integer.parseInt(array[1]);  
    for(int cols=0; cols < Grid5.COLUMN;cols++) {
            //frame refers to currently initialized Grid5 object
        if(frame.buttons[row][cols].getName().equals(color)){
            return true;
        }
    }
    for(int rows=0;rows < Grid5.ROW; rows++){
            //frame refers to currently initialized Grid5 object
        if(frame.buttons[rows][column].getName().equals(color)){
            return true;
        }
    }
    return false;
}

上述方法基本上通过当前行/ coloumn工作，并检查颜色是否设置为框架的任何按钮的名称。

第4步：最后一部分是在ActionListener buttonAction中调用此方法，如下例所示：

  JButton fill = (JButton) a.getSource(); 
    if(fill == fillRed){
        String colour = "Red";
        if(!hasColorInRowOrCol(colour)){
            buttonPress.setBackground(Color.RED);
            buttonPress.setName("Red");
            dispose();
        }
    }

java颜色网格问题

1 个答案: