我的应用程序上有多个JPanels,但是我无法弄清楚如何准确地检测到哪个被单击。
在我的MouseListener中,我有参数e,但是我的方法不起作用
在我的代码的早期,我声明了多个JPanels和一个侦听器对象。
PuzzleListener plist = new PuzzleListener();
JPanel puzzle_board = new JPanel(new GridLayout(4,4,5,5));
...
Square square1 = new Square("1");
Square square2 = new Square("2");
...
puzzle_board.add(square1);
puzzle_board.add(square2);
...
square1.addMouseListener(plist);
square1.addMouseListener(plist);
class PuzzleListener implements MouseListener
{
public void mouseClicked(MouseEvent e)
{
JPanel pnlClick = (JPanel)(e.getSource());
//System.out.println(pnlClick);
//System.out.println(e.getSource());
//System.out.println(e.getComponent().getClass());
//System.out.println(e.getComponent().getClass().getName());
//problem is here
if(pnlClick == square1)
{
System.out.println("Panel 1 has been clicked");
}
if(pnlClick == square2)
{
System.out.println("Panel 2 has been clicked");
}
}
public void mouseExited(MouseEvent e)
{
}
public void mouseEntered(MouseEvent e)
{
//System.out.println("Panel 1 has been clicked");
}
public void mouseReleased(MouseEvent e)
{
}
public void mousePressed(MouseEvent e)
{
}
/*
public void actionPerformed(ActionEvent e)
{
JPanel pnlClick = (JPanel)(e.getSource());
}*/
}//end calcListener
最佳答案
问题似乎是您在每个方形面板上都有一个类变量和一个局部变量。
Square square1 = new Square("1");
应该:
square1 = new Square("1");
现在,您将只有一个可供PuzzleListener引用的类变量。
关于java - 需要多个JPanel来响应自己的鼠标单击事件,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/3755363/