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我正在使用遞歸方法在用戶鍵入的Boggle板上對JButton進行着色。例如，如果單詞「CAT」用作單詞參數，則該方法將搜索按鈕[] []數組以找到其旁邊具有「A」並且在其旁邊具有「T」的「C」，並且將相應的按鈕顏色變爲橙色並返回true。但是，我的代碼存在像CATATATAT這樣的字也會返回true的問題，因爲我的代碼無意中允許重用按鈕。遞歸和/或getBackground（）不能按預期工作
問題是我在檢查JButton是否已被使用（已經着色爲橙色）時遇到問題。當我在遞歸方法中使用getBackground（）時，我發現JButtons仍然是默認的白色，即使它們在視覺上是橙色的。有關如何檢測JButton已被使用（已着色爲橙色）的任何想法？
JButton[][] buttons = new JButton[4][4];
Color orange = new Color(245, 130, 32);
承擔的JButton陣列充滿了新的按鈕隨機字母每個
public boolean findWord(String word) {
clearButtons();
for (int row = 0; row < length; row++) {
for (int col = 0; col < length; col++) {
if (findWord(word, row, col)) {
System.out.println("");
return true;
}
}
}
return false;
}
private boolean findWord(String word, int row, int col) {
if(word.equals("")) {
return true;
}
if (row < 0 || row >= length ||
col < 0 || col >= length ||
!(buttons[row][col].getText().equals(word.substring(0,1))) ||
buttons[row][col].getBackground().equals(orange) // <- always is false
) {
return false;
}
String rest = word.substring(1, word.length());
boolean letter =
findWord(rest, row-1, col-1) ||
findWord(rest, row-1, col) ||
findWord(rest, row-1, col+1) ||
findWord(rest, row, col-1) ||
findWord(rest, row, col+1) ||
findWord(rest, row+1, col-1) ||
findWord(rest, row+1, col) ||
findWord(rest, row+1, col+1);
if(letter) {
buttons[row][col].setBackground(orange); // <- despite this
}
return letter;
}
我試圖削減方案，儘可能以使其可以運行。只需在重複單詞部分的文本區域輸入內容即可。 下面是一個完整的可運行版本：
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.UIManager.LookAndFeelInfo;
import javax.swing.text.JTextComponent;
public class BoggleGame extends JFrame implements ActionListener, KeyListener {
private static final long serialVersionUID = -3125864417227564060L;
String[] wordArray = new String[0];
static String username;
int length = 4;
public JTextArea searchTextArea = new JTextArea(0,12);
DefaultListModel wordListModel= new DefaultListModel();
JButton[][] buttons = new JButton[length][length];
JList wordList = new JList(wordListModel);
JScrollPane wordScrollPane = new JScrollPane(wordList);
JPanel northPanel = new JPanel();
JPanel timePanel = new JPanel();
JPanel usernamePanel = new JPanel();
JPanel southPanel = new JPanel();
JPanel centerPanel = new JPanel();
JPanel eastPanel = new JPanel();
ImageIcon logo = new ImageIcon(getClass().getResource("logo.png"));
Color white = new Color(255,255,255);
Color blue = new Color(0,150 ,240);
Color orange = new Color(245, 130, 32);
Color dark_orange = new Color(180, 117 , 70);
public static void main(String[] arguments){
new BoggleGame();
}
public BoggleGame(){
// Set Title
super("");
// Set up Frame
setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Set Layout
getContentPane().setLayout(new BorderLayout());
nimbusLookAndFeel();
// North Panel
northPanel.setLayout(new GridLayout(1,3));
northPanel.setPreferredSize(new Dimension(550,100));
northPanel.setBackground(blue);
// Username Panel
usernamePanel.setLayout(new FlowLayout(FlowLayout.LEFT));
usernamePanel.setBackground(blue);
JLabel usernameLabel = new JLabel("Username:");
usernamePanel.add(usernameLabel);
JTextArea usernameTextArea = new JTextArea();
usernameTextArea.setText(Login.username);
usernamePanel.add(usernameTextArea);
northPanel.add(usernamePanel);
usernameTextArea.setEditable(false);
add(northPanel, BorderLayout.NORTH);
northPanel.add(usernamePanel);
// Logo
northPanel.add(new JLabel(logo));
// Time Panel
timePanel.setLayout(new FlowLayout(FlowLayout.RIGHT));
timePanel.setBackground(blue);
JLabel timeLabel = new JLabel("Time:");
timePanel.add(timeLabel);
JTextArea timeTextArea = new JTextArea();
timeTextArea.setText("0");
timePanel.add(timeTextArea);
northPanel.add(timePanel);
timeTextArea.setEditable(false);
add(northPanel, BorderLayout.NORTH);
// South Panel
southPanel.setPreferredSize(new Dimension(550,50));
southPanel.setBackground(blue);
searchTextArea.setLineWrap(true);
southPanel.add(searchTextArea);
searchTextArea.setBorder(BorderFactory.createLineBorder(Color.BLACK));
searchTextArea.setFont(new Font("Geniva", Font.PLAIN, 30));
searchTextArea.addKeyListener((KeyListener) this);
JButton submitButton = new JButton("Submit");
submitButton.addActionListener(this);
southPanel.add(submitButton);
JButton quitButton = new JButton("Quit");
quitButton.addActionListener(this);
southPanel.add(quitButton);
getContentPane().add(southPanel, BorderLayout.SOUTH);
// Center Panel
centerPanel.setPreferredSize(new Dimension(400,400));
centerPanel.setBackground(blue);
centerPanel.setLayout(new GridLayout(length, length));
//generate buttons
for(int i=0; i<length; i++) {
for(int j=0; j<length; j++) {
buttons[i][j]=new JButton(Character.toString(((char)(int)(Math.random() * 25 + 65))));
buttons[i][j].setBackground(white);
//buttons[i][j].setForeground(white);
buttons[i][j].setFont(new Font("Geniva", Font.BOLD, 200/length));
buttons[i][j].addActionListener(this);
centerPanel.add(buttons[i][j]);
}
}
getContentPane().add(centerPanel, BorderLayout.CENTER);
// East Panel
eastPanel.add(wordScrollPane);
wordScrollPane.setPreferredSize(new Dimension(150,400));
eastPanel.setBackground(blue);
getContentPane().add(eastPanel, BorderLayout.EAST);
// Finalize
pack();
searchTextArea.requestFocusInWindow();
setLocationRelativeTo(null);
setVisible(true);
}
public void nimbusLookAndFeel() {
try {
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (Exception e) {
}
}
public void clearButtons() {
for(int i= 0; i<buttons.length; i++) {
for(int j=0; j<buttons[0].length; j++) {
buttons[i][j].setBackground(white);
}
}
}
public void submitWord() {
if(findWord(searchTextArea.getText()) && !(searchTextArea.getText().equals(""))){
wordListModel.addElement(searchTextArea.getText().toUpperCase());
} else {
wordListModel.addElement("Not a word!");
}
searchTextArea.getDocument().putProperty("filterNewlines", Boolean.TRUE);
wordList.ensureIndexIsVisible(wordListModel.size()-1);
searchTextArea.setText("");
}
@Override
public void actionPerformed(ActionEvent e) {
// Check if source is the Submit Button
if(((JButton) e.getSource()).getText().equals("Submit")){
submitWord();
// Check if source is the Quit Button
} else if(((JButton) e.getSource()).getText().equals("Quit")){
dispose();
// Source must be a Letter Button
} else if(!((JButton) e.getSource()).getBackground().equals(orange)){
searchTextArea.append(((JButton) e.getSource()).getText());
((JButton) e.getSource()).setBackground(orange);
}
searchTextArea.requestFocusInWindow();
}
@Override
public void keyPressed(KeyEvent e) {
searchTextArea.setText(searchTextArea.getText().toUpperCase());
if (e.getKeyCode()==KeyEvent.VK_ENTER){
submitWord();
}
}
@Override
public void keyReleased(KeyEvent e) {
searchTextArea.setText(searchTextArea.getText().toUpperCase());
if(!findWord(searchTextArea.getText())) {
clearButtons();
}
if (e.getKeyCode()==KeyEvent.VK_ENTER){
searchTextArea.setText("");
}
}
@Override
public void keyTyped(KeyEvent e) {
}
// here is the method that does not work!
public boolean findWord(String word) {
clearButtons();
for (int row = 0; row < length; row++) {
for (int col = 0; col < length; col++) {
if (findWord(word, row, col)) {
System.out.println("");
return true;
}
}
}
return false;
}
private boolean findWord(String word, int row, int col) {
if(word.equals("")) {
return true;
}
if (row < 0 || row >= length ||
col < 0 || col >= length ||
!(buttons[row][col].getText().equals(word.substring(0,1))) ||
buttons[row][col].getBackground().equals(orange) //<-doesn't work
) {
return false;
}
System.out.println(buttons[row][col].getBackground());
String rest = word.substring(1, word.length());
boolean letter =
findWord(rest, row-1, col-1) ||
findWord(rest, row-1, col) ||
findWord(rest, row-1, col+1) ||
findWord(rest, row, col-1) ||
findWord(rest, row, col+1) ||
findWord(rest, row+1, col-1) ||
findWord(rest, row+1, col) ||
findWord(rest, row+1, col+1);
if(letter) {
buttons[row][col].setBackground(orange);
}
return letter;
}
}
你調試到？ 'button [row] [col] .getBackground（）'返回什麼？ –
對不起，如果不清楚！ 1.orange是之前聲明的顏色 2.buttons [row] [col] .getBackground（）返回java.awt.Color [r = 255，g = 255，b = 255] （默認白色） – caziz
考慮提供一個[runnable示例]（https://stackoverflow.com/help/mcve），它演示了您的問題。這不是代碼轉儲，而是您正在做的事情的一個例子，它突出了您遇到的問題。這將導致更少的混淆和更好的反應 – MadProgrammer