我有一个简单的游戏，其中有一个 JOptionPane 弹出窗口，可以选择是或否。
因此，如果用户点击“否”，那么游戏当然会关闭，但是如果用户点击“是”，我希望游戏重新开始。
我通过以下方式使它起作用：（只需再次调用 main() 方法。main.Main.main(null);
问题 ：
它正在开始游戏的另一个实例，但前一个实例也在那里。
如何在启动新实例之前关闭前一个实例？或者还有什么其他方法可以解决这个问题？
这是带有 JOptionPane 的类代码
public void popupWinMessage(String message)
{
//default icon, custom title
int n = JOptionPane.showConfirmDialog(
null,
message,
"",
JOptionPane.YES_NO_OPTION);
if(n == JOptionPane.YES_OPTION){
JOptionPane.showMessageDialog(null, "Alright, here we go again");
main.Main.main(null);
}
else {
JOptionPane.showMessageDialog(null, "Thanks for playing the battleships game");
System.exit(0);
}
这是我更新的主要方法（我仍然对发生的事情感到困惑）：
package main;
imports
public class Main {
public Controller theController = new Controller(new Game(), new Frame());
/**
* @param args
*/
public static void main(String[] args)
{
newGame();
}
public static void newGame()
{
theController.;
}
}
我整个游戏的目录是这样的
http://i.imgur.com/7iKJQwu.png
JOption 窗格所在的方法在视图的 Frame 类中。
public Controller(final Game newGame, final Frame newView)
{
this.game = newGame;
this.view = newView;
this.view.setVisible(true);
//Gets the board arrays into these local variables here for us to use
playerBoard = newGame.DisplayPlayerBoard();
computerBoard = newGame.DisplayCompBoard();
colourGrids();
this.view.addGridActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent ae)
{
Object o = ae.getSource();
if(o instanceof JButton)
{
JButton btn = (JButton) o;
int xValue = (Integer) btn.getClientProperty("row");
int yValue = (Integer) btn.getClientProperty("column");
int tempShipType = computerBoard[xValue][yValue];
newGame.tryHitComputer(xValue, yValue);
btn.setEnabled(false);
if(tempShipType != -1)
{
if(newGame.checkShipStatus(tempShipType) == true)
{
System.out.println(shipDowns[tempShipType]);
newView.popupMessage(shipDowns[tempShipType]);
}
}
//Code here for the computer to try hit your ships
newGame.tryHitPlayer();
colourGrids();
System.out.println(newGame.isGameWon());
if (newGame.isGameWon() == true)
{
System.out.println("Game has been won, do something to stop it at some point");
newView.popupWinMessage("Game has been won\nDo you wish to play again?");
}
if (newGame.isGameLost() == true)
{
System.out.println("Game has been lost, the silly AI has beaten you\nDo you wish to play again?");
newView.popupWinMessage("Game has been lost, the silly AI has beaten you\nDo you wish to play again?");
}
}
else
{
System.out.println("The listener was not attached to a JButton as expected - " + o.getClass());
}
}
});
}