如何使用ActionEvent获取ENTER键的KeyStroke？

Question

我正在用Java编写一个应用程序，我需要在用户按下字母键时发生一件事情，当用户点击ENTER时会发生一些不同的事情但是当我点击ENTER时我似乎无法得到一个键名，只有一个新行。

我想我应该使用getKeyStroke，但我不确定这是否可行，因为我正在使用ActionEvent。

这就是我到目前为止所做的事情：

panelMaster.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put(KeyStroke.getKeyStroke("A"), "doSomething");
panelMaster.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put(KeyStroke.getKeyStroke("B"), "doSomething");
panelMaster.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put(KeyStroke.getKeyStroke("C"), "doSomething");
panelMaster.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put(KeyStroke.getKeyStroke( "ENTER" ), "doSomething");
panelMaster.getActionMap().put("doSomething", anAction);

然后我有一个单独的Action类。

class AnAction extends AbstractAction{        
    public void actionPerformed(ActionEvent e) {
        System.out.println("Received: " + e.getActionCommand());
    }    
}

当我键入两个系列的“a”然后“b”然后“c”然后“输入”这就是我的输出：

Received: a
Received: b
Received: c
Received: 

Received: a
Received: b
Received: c
Received: 

Answer 1

你可以使用     KeyStroke.getKeyStroke（KeyEvent.VK_ENTER，0）

Answer 2

试试这个：

panelMaster.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT)
           .put(KeyStroke.getKeyStroke( "pressed ENTER" ), "doSomething");
panelMaster.getActionMap().put("doSomething", anAction);