我正在创建一个使用虚拟键盘进行输入的挂接游戏。我使用for循环创建键盘布局来创建按钮,然后将其放入jbutton arraylist中。所有按钮都使用一个ActionListener。
在游戏结束时,我需要重置所有按钮,以便它们不再具有边框(如果玩家正确猜测,则在游戏过程中将绿色或红色边框放置在它们周围)。我试图通过jbutton arraylist循环以更改边框,但它仅适用于最后一个按钮。有办法可以做到吗?
我也想知道如何将按钮返回其原始设计,因为当我使用button.setBorder(null)
时,该按钮基本上会消失。我想删除我在程序中较早设置的MatteBorder
。
public void createKeyboard() {
String buttonLabel;
char buttonLabelChar;
for (char c = 'A'; c <= 'Z'; c ++) {
buttonLabelChar = c;
buttonLabel = "" + buttonLabelChar;
JButton button = new JButton(buttonLabel);
keyboardArray = new ArrayList<JButton>();
keyboardArray.add(button);
button.setPreferredSize(new Dimension(40, 40));
pnlKeyboard.add(button);
button.addActionListener(
new ActionListener() {
@Override
public void actionPerformed(ActionEvent event) {
hm.setLetterGuessed(event.getActionCommand().charAt(0));
hm.revealLetter();
if (hm.revealLetter()) {
button.setBorder(new MatteBorder(4, 4, 4, 4, Color.GREEN));
button.setEnabled(false);
}
else {
button.setBorder(new MatteBorder(4, 4, 4, 4, Color.RED));
button.setEnabled(false);
hm.loseLife();
setImage();
}
if (hm.winCheck()) {
JOptionPane.showMessageDialog(mainFrame, "You win!", "Game Over",
JOptionPane.INFORMATION_MESSAGE, new ImageIcon(Hangman.class.getResource("images/11rightleg.png")));
for (int i = 0; i < keyboardArray.size(); i ++) { // THIS DOESN'T WORK
button.setBorder(null);
}
}
else if (hm.getLives() == 0) {
JOptionPane.showMessageDialog(mainFrame, "You lose :(", "Game Over",
JOptionPane.INFORMATION_MESSAGE, new ImageIcon(Hangman.class.getResource("images/11rightleg.png")));
}
setWord();
}
}
);
}
}
一个选项是完全避免匿名类,以便侦听器可以在createKeyboard()
方法外使用keyboardArray
:
ArrayList<JButton> keyboardArray;
public void createKeyboard() {
String buttonLabel;
char buttonLabelChar;
for (char c = 'A'; c <= 'Z'; c ++) {
// ...
keyboardArray = new ArrayList<JButton>();
keyboardArray.add(button);
// ...
button.addActionListener(new ButtonListener());
}
}
class ButtonListener {
public void actionPerformed(ActionEvent event) {
hm.setLetterGuessed(event.getActionCommand().charAt(0));
hm.revealLetter();
if (hm.revealLetter()) {
button.setBorder(new MatteBorder(4, 4, 4, 4, Color.GREEN));
button.setEnabled(false);
} else {
button.setBorder(new MatteBorder(4, 4, 4, 4, Color.RED));
button.setEnabled(false);
hm.loseLife();
setImage();
}
if (hm.winCheck()) {
JOptionPane.showMessageDialog(mainFrame, "You win!", "Game Over", JOptionPane.INFORMATION_MESSAGE, new ImageIcon( Hangman.class.getResource("images/11rightleg.png")));
for (int i = 0; i < keyboardArray.size(); i ++) { // THIS DOESN'T WORK
keyboardArray.get(i).setBorder(null);
}
} else if (hm.getLives() == 0) {
JOptionPane.showMessageDialog(mainFrame, "You lose :(", "Game Over",
JOptionPane.INFORMATION_MESSAGE, new ImageIcon(Hangman.class.getResource("images/11rightleg.png")));
}
setWord();
}
}
我发现了问题。我必须在构造函数内部创建键盘arraylist对象。