JAVA 6×6网格着色游戏

大家好，我现在最后一部分是文件阅读。 我试过写一个fileReader但似乎没有改变我的变量rNum的值？

关于为什么它不会在以下陈述中改变的任何想法？ 谢谢

public void readStartFile(String fileName){ int rowNumber=-1; int colNumber = -1; int rN= 0; int cN = 0; try{ // Open the file that is the first // command line parameter FileInputStream fstream = new FileInputStream("start.txt"); BufferedReader br = new BufferedReader(new InputStreamReader(fstream)); String strLine; //Read File Line By Line while ((strLine = br.readLine()) != null) { String[] temp = strLine.split(" "); rowNumber = Integer.parseInt(temp[0].substring(1, temp[0].length())); colNumber = Integer.parseInt(temp[1].substring(1, temp[1].length())); String colour = temp[2]; if(rowNumber == 0) rN =0; else if(rowNumber == 1) rN =1; else if(rowNumber == 2) rN =2; else if(rowNumber == 3) rN =3; else if(rowNumber == 4) rN =4; else if(rowNumber == 5) rN =5; if(colNumber == 0) cN =0; else if(colNumber == 1) cN =1; else if(colNumber == 2) cN =2; else if(colNumber == 3) cN =3; else if(colNumber == 4) cN =4; else if(colNumber == 5) cN =5; if (colour == "Red") buttons[rN][cN].setBackground(Color.RED); System.out.println(""+rN); System.out.println(""+cN); } //Close the input stream in.close(); }catch (Exception e){//Catch exception if any System.err.println("Error: " + e.getMessage()); } } 

这是ButtonColours类的一个方法。 现在我如何将按钮设置为指定的颜色，因为我现在正在做的事似乎不起作用。

Answer 1

为了改变JButton的Colour ，首先要记住一件事，总是要使用buttonObject.setOpaque(true); 正如@Robin曾经给我的一些建议:-)。 从Java Docs中调用setOpaque(true/false)

 Sets the background color of this component. The background color is used only if the component is opaque 

在这里，我稍微修改了你的代码，并添加了一些关于我添加的内容的评论，看看这是你想要的。

 import java.awt.*; import java.awt.event.*; import java.io.*; import javax.swing.*; public class ButtonColours extends JFrame { private static ButtonColours buttonColours; /* * Access Specifier is public, so that they can be * accessed by the ColourDialog class. */ public JButton[][] buttons; private static final int GRID_SIZE = 600; public static final int ROW = 6; public static final int COLUMN = 6; // Gap between each cell. private static final int GAP = 2; private static final Color DEFAULT_COLOUR = new Color(100,100,100); public static final String DEFAULT_COMMAND = "6"; // Instance Variable for the ColourDialog class. private ColourDialog dialog = null; private BufferedReader input; private DataInputStream dataInputStream; private FileInputStream fileInputStream; private String line= ""; /* * Event Handler for each JButton, inside * the buttons ARRAY. */ public ActionListener buttonActions = new ActionListener() { public void actionPerformed(ActionEvent ae) { JButton button = (JButton) ae.getSource(); System.out.println(ae.getActionCommand()); if (dialog != null && dialog.isShowing()) dialog.dispose(); dialog = new ColourDialog(buttonColours, "COLOUR CHOOSER", false, button); dialog.setVisible(true); button.setBackground(DEFAULT_COLOUR); button.setName("6"); } }; public ButtonColours() { buttons = new JButton[ROW][COLUMN]; try { fileInputStream = new FileInputStream("start.txt"); dataInputStream = new DataInputStream(fileInputStream); input = new BufferedReader(new InputStreamReader(dataInputStream)); } catch(IOException ioe) { ioe.printStackTrace(); } } /* * Instead of explicitly calling getPreferredSize() method * we will override that method instead, for good * visual appearance fo the Program on different * Platforms, ie Windows, MAC OS, LINUX */ public Dimension getPreferredSize() { return (new Dimension(GRID_SIZE, GRID_SIZE)); } private void readFile() { int rowNumber = -1; int columnNumber = -1; try { while((line = input.readLine()) != null) { String[] temp = line.split(" "); rowNumber = Integer.parseInt(temp[0].substring(1, temp[0].length())); columnNumber = Integer.parseInt(temp[1].substring(1, temp[1].length())); String colour = temp[2].trim(); System.out.println("Row is : " + rowNumber); System.out.println("Column is : " + columnNumber); System.out.println("Colour is : " + colour); if (colour.equals("RED") && rowNumber < ROW && columnNumber < COLUMN) { System.out.println("I am working !"); buttons[rowNumber][columnNumber].setBackground(Color.RED); buttons[rowNumber][columnNumber].setName("0"); } else if (colour.equals("YELLOW") && rowNumber < ROW && columnNumber < COLUMN) { buttons[rowNumber][columnNumber].setBackground(Color.YELLOW); buttons[rowNumber][columnNumber].setName("1"); } else if (colour.equals("BLUE") && rowNumber < ROW && columnNumber < COLUMN) { buttons[rowNumber][columnNumber].setBackground(Color.BLUE); buttons[rowNumber][columnNumber].setName("2"); } else if (colour.equals("GREEN") && rowNumber < ROW && columnNumber < COLUMN) { buttons[rowNumber][columnNumber].setBackground(Color.GREEN); buttons[rowNumber][columnNumber].setName("3"); } else if (colour.equals("PURPLE") && rowNumber < ROW && columnNumber < COLUMN) { buttons[rowNumber][columnNumber].setBackground(new Color(102,0,102)); buttons[rowNumber][columnNumber].setName("4"); } else if (colour.equals("BROWN") && rowNumber < ROW && columnNumber < COLUMN) { buttons[rowNumber][columnNumber].setBackground(new Color(102,51,0)); buttons[rowNumber][columnNumber].setName("5"); } } } catch(IOException ioe) { ioe.printStackTrace(); } } private void createAndDisplayGUI() { setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setLocationByPlatform(true); JComponent contentPane = (JComponent) getContentPane(); contentPane.setLayout(new GridLayout(ROW, COLUMN, GAP, GAP)); for (int i = 0; i < ROW; i++) { for (int j = 0; j < COLUMN; j++) { buttons[i][j] = new JButton(); buttons[i][j].setOpaque(true); buttons[i][j].setBackground(DEFAULT_COLOUR); buttons[i][j].setActionCommand(i + " " + j); buttons[i][j].setName("6"); buttons[i][j].addActionListener(buttonActions); contentPane.add(buttons[i][j]); } } pack(); setVisible(true); readFile(); } public static void main(String... args) { SwingUtilities.invokeLater(new Runnable() { public void run() { buttonColours = new ButtonColours(); buttonColours.createAndDisplayGUI(); } }); } } class ColourDialog extends JDialog { private Color[] colours = { Color.RED, Color.YELLOW, Color.BLUE, Color.GREEN, new Color(102,0,102), new Color(102,51,0) }; private int[] colourIndices = new int[6]; private JButton redButton; private JButton yellowButton; private JButton blueButton; private JButton greenButton; private JButton purpleButton; private JButton brownButton; private JButton clickedButton; private int leftRowButtons; private int leftColumnButtons; public ColourDialog(final ButtonColours frame, String title, boolean isModal, JButton button) { super(frame, title, isModal); leftRowButtons = 0; leftColumnButtons = 0; clickedButton = button; setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE); setLocationByPlatform(true); JPanel panel = new JPanel(); panel.setLayout(new GridLayout(0, 1, 5, 5)); panel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5)); redButton = new JButton("RED"); redButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { String possibleColour = "0"; /* * Here we will check, if RED is clicked, * do we have any block with the same colour * or not, if yes then nothing will happen * else we will change the background * to RED. */ if (checkBlockColours(frame, possibleColour)) { clickedButton.setBackground(Color.RED); clickedButton.setName("0"); dispose(); System.out.println("LEFT in ROW : " + leftRowButtons); System.out.println("LEFT in COLUMN : " + leftColumnButtons); System.out.println("Button Name : " + clickedButton.getName()); fillRemaining(frame); } } }); yellowButton = new JButton("YELLOW"); yellowButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { String possibleColour = "1"; if (checkBlockColours(frame, possibleColour)) { clickedButton.setBackground(Color.YELLOW); clickedButton.setName("1"); dispose(); System.out.println("LEFT in ROW : " + leftRowButtons); System.out.println("LEFT in COLUMN : " + leftColumnButtons); System.out.println("Button Name : " + clickedButton.getName()); fillRemaining(frame); } } }); blueButton = new JButton("BLUE"); blueButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { String possibleColour = "2"; if (checkBlockColours(frame, possibleColour)) { clickedButton.setBackground(Color.BLUE); clickedButton.setName("2"); dispose(); System.out.println("LEFT in ROW : " + leftRowButtons); System.out.println("LEFT in COLUMN : " + leftColumnButtons); System.out.println("Button Name : " + clickedButton.getName()); fillRemaining(frame); } } }); greenButton = new JButton("GREEN"); greenButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { String possibleColour = "3"; if (checkBlockColours(frame, possibleColour)) { clickedButton.setBackground(Color.GREEN); clickedButton.setName("3"); dispose(); System.out.println("LEFT in ROW : " + leftRowButtons); System.out.println("LEFT in COLUMN : " + leftColumnButtons); System.out.println("Button Name : " + clickedButton.getName()); fillRemaining(frame); } } }); purpleButton = new JButton("PURPLE"); purpleButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { String possibleColour = "4"; if (checkBlockColours(frame, possibleColour)) { clickedButton.setBackground(new Color(102,0,102)); clickedButton.setName("4"); dispose(); System.out.println("LEFT in ROW : " + leftRowButtons); System.out.println("LEFT in COLUMN : " + leftColumnButtons); System.out.println("Button Name : " + clickedButton.getName()); fillRemaining(frame); } } }); brownButton = new JButton("BROWN"); brownButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { String possibleColour = "5"; if (checkBlockColours(frame, possibleColour)) { clickedButton.setBackground(new Color(102,51,0)); clickedButton.setName("5"); dispose(); System.out.println("LEFT in ROW : " + leftRowButtons); System.out.println("LEFT in COLUMN : " + leftColumnButtons); System.out.println("Button Name : " + clickedButton.getName()); fillRemaining(frame); } } }); panel.add(redButton); panel.add(yellowButton); panel.add(blueButton); panel.add(greenButton); panel.add(purpleButton); panel.add(brownButton); add(panel); pack(); } private boolean checkBlockColours(ButtonColours frame, String possibleColour) { leftRowButtons = 0; leftColumnButtons = 0; String command = clickedButton.getActionCommand(); String[] array = command.split(" "); int row = Integer.parseInt(array[0]); int column = Integer.parseInt(array[1]); // First we will check in ROW. for the same colour, that is clicked. for (int i = 0; i < ButtonColours.COLUMN; i++) { if (i != column) { JButton button = frame.buttons[row][i]; if (button.getName().equals(possibleColour)) return false; else if (button.getName().equals(ButtonColours.DEFAULT_COMMAND)) leftRowButtons++; } } // Now we will check in COLUMN, for the same colour, that is clicked. for (int i = 0; i < ButtonColours.ROW; i++) { if (i != row) { JButton button = frame.buttons[i][column]; if (button.getName().equals(possibleColour)) return false; else if (button.getName().equals(ButtonColours.DEFAULT_COMMAND)) leftColumnButtons++; } } return true; } private void fillRemaining(ButtonColours frame) { String command = clickedButton.getActionCommand(); String[] array = command.split(" "); int row = Integer.parseInt(array[0]); int column = Integer.parseInt(array[1]); int emptyRow = -1; int emptyColumn = -1; if (leftRowButtons == 1) { for (int i = 0; i < ButtonColours.COLUMN; i++) { JButton button = frame.buttons[row][i]; int colourIndex = Integer.parseInt(button.getName()); switch(colourIndex) { case 0: colourIndices[0] = 1; break; case 1: colourIndices[1] = 1; break; case 2: colourIndices[2] = 1; break; case 3: colourIndices[3] = 1; break; case 4: colourIndices[4] = 1; break; case 5: colourIndices[5] = 1; break; default: emptyRow = row; emptyColumn = i; } } for (int i = 0; i < colourIndices.length; i++) { if (colourIndices[i] == 0) { frame.buttons[emptyRow][emptyColumn].setBackground(colours[i]); setButtonName(frame.buttons[emptyRow][emptyColumn], i); System.out.println("Automatic Button Name : " + frame.buttons[emptyRow][emptyColumn].getName()); System.out.println("Automatic Row : " + emptyRow); System.out.println("Automatic Column : " + emptyColumn); disableListenersRow(frame, row); if (checkBlockColours(frame, ButtonColours.DEFAULT_COMMAND)) { System.out.println("LEFT in ROW : " + leftRowButtons); System.out.println("LEFT in COLUMN : " + leftColumnButtons); System.out.println("Button Name : " + clickedButton.getName()); fillRemaining(frame); } break; } } } if (leftColumnButtons == 1) { for (int i = 0; i < ButtonColours.ROW; i++) { JButton button = frame.buttons[i][column]; int colourIndex = Integer.parseInt(button.getName()); switch(colourIndex) { case 0: colourIndices[0] = 1; break; case 1: colourIndices[1] = 1; break; case 2: colourIndices[2] = 1; break; case 3: colourIndices[3] = 1; break; case 4: colourIndices[4] = 1; break; case 5: colourIndices[5] = 1; break; default: emptyRow = i; emptyColumn = column; } } for (int i = 0; i < colourIndices.length; i++) { if (colourIndices[i] == 0) { frame.buttons[emptyRow][emptyColumn].setBackground(colours[i]); setButtonName(frame.buttons[emptyRow][emptyColumn], i); System.out.println("Automatic Button Name : " + frame.buttons[emptyRow][emptyColumn].getName()); System.out.println("Automatic Row : " + emptyRow); System.out.println("Automatic Column : " + emptyColumn); disableListenersColumn(frame, column); if (checkBlockColours(frame, ButtonColours.DEFAULT_COMMAND)) { System.out.println("LEFT in ROW : " + leftRowButtons); System.out.println("LEFT in COLUMN : " + leftColumnButtons); System.out.println("Button Name : " + clickedButton.getName()); fillRemaining(frame); } break; } } } } private void setButtonName(JButton button, int index) { switch(index) { case 0: button.setName("0"); break; case 1: button.setName("1"); break; case 2: button.setName("2"); break; case 3: button.setName("3"); break; case 4: button.setName("4"); break; case 5: button.setName("5"); break; } } private void disableListenersRow(ButtonColours frame, int row) { System.out.println("Disabled ROW : " + row); for (int i = 0; i < ButtonColours.ROW; i++) { frame.buttons[row][i].removeActionListener(frame.buttonActions); System.out.println("DISABLED BUTTONS : " + row + " " + i); } } private void disableListenersColumn(ButtonColours frame, int column) { System.out.println("Disabled COLUMN : " + column); for (int i = 0; i < ButtonColours.COLUMN; i++) { frame.buttons[i][column].removeActionListener(frame.buttonActions); System.out.println("DISABLED BUTTONS : " + i + " " + column); } } } 

这是这个东西的输出:-)

Answer 2

不幸的是，没有可靠的方法来改变任何JButton的颜色。 一些“外观和感觉”实现不遵循setBackground()设置的颜色。 你最好只是在面板上添加一个MouseListener来监听鼠标上升事件，然后对它们做出响应，而不是根本使用按钮。

Answer 3

• （也许直接使用JColorChooser ）

• 不要使用两个JFrame

• 使用putClientProperty

• 使用ButtonModel或MouseListener

• 使用JOptionsPane放置返回Color的JButtons ，或者使用GridLayout生成的JButtons创建JDialog（parent，true）

Answer 4

在任何 L＆F中改变按钮外观的一种方便可靠的方法是实现Icon界面，如本例所示。