我正在做一个TicTacToe程序，现在我正在使用菜单来改变电路板的大小（从3x3到9x9）我需要在添加新的按钮之前删除当前使用的按钮。在尝试删除它们时循环，我收到此错误：
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 3
at TicTacToe$menuItem.actionPerformed(TicTacToe.java:84)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
at java.awt.Component.processMouseEvent(Component.java:6535)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6300)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4891)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4713)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2750)
at java.awt.Component.dispatchEvent(Component.java:4713)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Process finished with exit code 0
这是代码（需要导入的所有东西，我只是没有将其粘贴）
public class TicTacToe extends JFrame{
public enum Space{EMPTY, X_SPACE, O_SPACE}
public enum Winner{PLAYER, COMPUTER, NEITHER}
int size;
Button button[][];
Space board[][];
int weight[][];
menuItem item[];
ImageIcon X = new ImageIcon(this.getClass().getResource("X.png"));
ImageIcon O = new ImageIcon(this.getClass().getResource("O.png"));
JPanel panel = new JPanel();
public TicTacToe(int s) {
// Initialize window properties
super("Tic Tac Toe");
boardSize(s);
item = new menuItem[7];
clearBoard();
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(500, 500);
setResizable(false);
setLocationRelativeTo(null);
panel.setLayout(new GridLayout(s, s));
JMenuBar menubar = new JMenuBar();
this.setJMenuBar(menubar);
JMenu menu = new JMenu("Set Size");
menubar.add(menu);
for(int i=0; i<item.length; i++){
item[i] = new menuItem(this, i+3, menu);
}
add(panel);
setVisible(true);
initWeight(); // Adds priority initialized in initWeight
}
public class Button extends JButton implements ActionListener {
int row, col;
TicTacToe ttt;
public Button(TicTacToe t, int r, int c){
ttt = t;
row = r;
col = c;
this.addActionListener(this); // Adds the action listener to the buttons(this)
}
public void actionPerformed(ActionEvent e){
// Displays move after event is found
ttt.enterMove(row, col);
displayWinner();
}
}
public class menuItem extends JMenuItem implements ActionListener{
int size;
TicTacToe ttt;
public menuItem(TicTacToe t,int s, JMenu menu){
ttt = t;
size = s;
setText(s+"x"+s);
menu.add(this);
this.addActionListener(this);
}
public void actionPerformed(ActionEvent e){
int s = size;
for(int i=0; i < s; i++){
for(int j=0; j < s; j++){
ttt.panel.remove(button[i][j]);
}
}
ttt.boardSize(size);
}
}
public void addButtons(int s){
s = size;
for(int i = 0; i < s; i++)
{
for(int j = 0; j < s; j++)
{
board[i][j] = Space.EMPTY;
button[i][j] = new Button(this, i, j);
panel.add(button[i][j]);
}
}
}
public void displayWinner() {
Space winner = getWinner();
String msg;
if(winner == Space.X_SPACE)
msg = "Congratulations. You beat a bot smartass.\n Would you like to play again?";
else if(winner == Space.O_SPACE)
msg = "Wow... You just lost against a random number generator... You suck.\n Do you want redemption?";
else
return;
int playAgain = JOptionPane.showConfirmDialog(this, msg, "Play Again", JOptionPane.YES_NO_OPTION); // Creates the window asking to play again
if(playAgain == JOptionPane.YES_OPTION)
clearBoard();
else
System.exit(0);
}
public void newGame(){
for(int i = 0; i < size; i++){
for(int j=0; j < size; j++) {
board[i][j] = Space.EMPTY;
}
}
}
public boolean enterMove(int i, int j) {
boolean goodMove = false;
if(board[i][j] == Space.EMPTY){
board[i][j] = Space.X_SPACE;
goodMove = true;
}else{
JOptionPane.showMessageDialog(this, "Invalid Move", "Error", JOptionPane.ERROR_MESSAGE);
}
if(goodMove)
updateBoard();
if(getWinner() == Space.EMPTY && goodMove){
computerMove();
updateBoard();
}
return goodMove;
}
public void boardSize(int s) {
size = s;
button = new Button[size][size];
board = new Space[size][size];
weight = new int[size][size];
addButtons(s);
clearBoard();
newGame();
}
public void initWeight(){
//Corners
weight[0][0] = 2;
weight[0][size -1] = 2;
weight[size-1][0] = 2;
weight[size-1][size-1] = 2;
//Edges
for(int i = 1; i < size-1; i++) {
weight[i][0] = 1;
weight[0][i] = 1;
weight[size - 1][i] = 1;
weight[i][size - 1] = 1;
}
//Center(s)
for(int i=1; i < size-1; i++){
for(int j=1; j < size-1; j++){
if(weight[i][j] == 0)
weight[i][j] = 3;
else if(weight[j][i] == 0)
weight[j][i] = 3;
}
}
}
public boolean computerMove() {
int mi = size, mj = size;
int w = 0;
for(int i=0; i < size; i++){
for(int j=0; j <size; j++){
if(board[i][j] == Space.EMPTY){
if(weight[i][j] > w){
w = weight[i][j];
mi = i;
mj = j;
}
}
}
}
if(mi < size && mj < size){
board[mi][mj] = Space.O_SPACE;
return true;
}
return false;
}
public void clearBoard(){
for(int i=0; i < size; i++){
for(int j=0; j < size; j++) {
board[i][j] = Space.EMPTY;
button[i][j].setIcon(null);
}
}
}
public Space getWinner(){
Space w = Space.EMPTY;
// Check for winner horizontally and vertically
boolean dwii=true, dwij=true;
for(int i=0; i < size; i++){
boolean hw=true, vw=true;
for(int j=1; j < size; j++){
if(board[i][0] != board[i][j])
hw = false;
if(board[0][i] != board[j][i])
vw = false;
}
if(hw && board[i][0] != Space.EMPTY)
w = board[i][0];
if(vw && board[0][i] != Space.EMPTY)
w = board[0][i];
if(board[0][0] != board[i][i])
dwii = false;
if(board[0][size-1] != board[i][size-i-1])
dwij = false;
}
if(dwii && board[0][0] != Space.EMPTY)
w = board[0][0];
if(dwij && board[0][size-1] != Space.EMPTY)
w = board[0][size-1];
return w;
}
public void updateBoard() {
for (int i = 0; i < size; i++) {
for(int j=0; j < size; j++) {
if (board[i][j] == Space.O_SPACE)
button[i][j].setIcon(O);
else if (board[i][j] == Space.X_SPACE)
button[i][j].setIcon(X);
}
}
}
public static void main(String[] args) { // all this does is run the window
new TicTacToe(3);
}
}
这是给我带来麻烦的部分。
public void actionPerformed(ActionEvent e){
int s = size;
for(int i=0; i < s; i++){
for(int j=0; j < s; j++){
ttt.panel.remove(button[i][j]);
}
}
ttt.boardSize(size);
}
}
答案 0 :(得分：1)
我需要在添加新按钮之前删除当前使用的按钮。
您可以在Container类上使用removeAll()方法。
这当然假设您创建了一个仅包含网格按钮的面板，这就是我设计GUI的方式。将组件分解为逻辑面板始终是个好主意。
答案 1 :(得分：0)
您似乎意外地修改了全局属性＆＃39; size＆＃39;在你的menuItem构造函数中。在这种情况下，＆＃39; size＆＃39;是> 3初始化menuItems后。