按下回车键时，Java 将焦点设置在 jbutton 上
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Java set focus on jbutton when pressing enter
提问by LOD121
How can I make it so that when I press enter in a JTextField it activates a specific JButton? What I mean is something along the lines of a web page form where you can press enter to activate the button in the form. Thanks.
我怎样才能做到当我在 JTextField 中按下 Enter 键时它会激活一个特定的 JButton？我的意思是类似于网页表单的内容，您可以在其中按 Enter 以激活表单中的按钮。谢谢。
回答by Jonas
You should use an Actionfor the JButton:
您应该使用 anAction来表示JButton：
Action sendAction = new AbstractAction("Send") {
public void actionPerformed(ActionEvent e) {
// do something
}
};
JButton button = new JButton(sendAction);
Then you can set the same action for a JTextFieldor even on a MenuItemif you want the same action to be available in the Menu:
然后JTextField，MenuItem如果您希望菜单中提供相同的操作，您可以为 a或什至在 a 上设置相同的操作：
JTextField textField = new JTextField();
textField.setAction(sendAction);
回答by Uhlen
Something like this should work:
这样的事情应该工作：
textField.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
button.requestFocusInWindow();
}
});
回答by sunil
You can achieve this by adding the defaultbehavior to the button, like this
您可以通过将default行为添加到按钮来实现这一点，就像这样
cmdLogin.setDefaultCapable(true); // by default, this is true
this.getRootPane().setDefaultButton(cmdLogin); // here `this` is your parent container
回答by Michael Berry
I'd do something like the following:
我会做类似以下的事情：
textField.addKeyListener(
new KeyAdapter() {
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
button.doClick();
}
}
});
}
