java - 按下 JButton 并按下 Enter 键

Question

这个问题已经有答案了:

Allowing the "Enter" key to press the submit button, as opposed to only using MouseClick (7 个回答)

已关闭 9 年前。

我正在做这个程序，这个框架注册了新用户。

我想要的是能够用信息填写每个文本字段，然后按“Cadastrar”键(“Cadastrar”=“注册”)，不仅可以使用鼠标，还可以使用“Enter” “键。

我尝试使用 keyListener 但结果让我有点困惑。代码如下:

package grafico;


public class TelaDeCadastro extends JFrame {

    private TextField campoConfirmaSenha;
    private TextField campoNome;
    private TextField campoEmail;
    private TextField campoSenha;
    private TextField dicaDeSenha;

    public static void main(String[] args) {

    public TelaDeCadastro() {
        setResizable(false);
        setIconImage(Toolkit.getDefaultToolkit().getImage(
                TelaDeCadastro.class.getResource("/Files/CashLog.png")));
        setTitle("Cadastro");
        setPreferredSize(new Dimension(400, 300));
        setLocationRelativeTo(null);

        JButton botaoCadastrar = new JButton("Cadastrar");
        botaoCadastrar.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {

                }
            }
        });
        botaoCadastrar.setBounds(139, 196, 115, 35);
        JButton botaoVoltar = new JButton("Voltar");
        botaoVoltar.setBounds(10, 231, 90, 30);
        JButton botaoSair = new JButton("Sair");
        botaoSair.setBounds(294, 231, 90, 30);

        ButtonGroup botoesRetorno = new ButtonGroup();
        botoesRetorno.add(botaoSair);
        botoesRetorno.add(botaoVoltar);

        // botão para submeter as informações passadas
        botaoCadastrar.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent arg0) {
        });

        // botão sair fecha o programa
        botaoSair.addActionListener(new ActionListener() {

        // botão voltar retorna para a tela de login
        botaoVoltar.addActionListener(new ActionListener() {

        JPanel container = new JPanel();
        container.setLayout(null);

        dicaDeSenha = new TextField();
        dicaDeSenha.setBounds(109, 159, 265, 22);
        container.add(dicaDeSenha);

        campoConfirmaSenha = new TextField();
        campoConfirmaSenha.setEchoChar('*');
        campoConfirmaSenha.setBounds(138, 126, 236, 23);
        container.add(campoConfirmaSenha);
        campoSenha = new TextField();
        campoSenha.setEchoChar('*');
        campoSenha.setBounds(109, 93, 265, 23);
        container.add(campoSenha);
        campoEmail = new TextField();
        campoEmail.setBounds(109, 62, 265, 23);
        container.add(campoEmail);
        campoNome = new TextField();
        campoNome.setBounds(109, 31, 265, 23);
        container.add(campoNome);

        JLabel labelNome = new javax.swing.JLabel("Seu nome:");
        labelNome.setBounds(10, 35, 364, 14);
        container.add(labelNome);
        JLabel labelEmail = new javax.swing.JLabel("Seu Email:");
        labelEmail.setBounds(10, 66, 364, 14);
        container.add(labelEmail);
        JLabel labelSenha = new javax.swing.JLabel("Sua senha:");
        labelSenha.setBounds(10, 95, 364, 14);
        container.add(labelSenha);

        JLabel lblConfirmarSenha = new JLabel("Confirmar senha:");
        lblConfirmarSenha.setBounds(10, 126, 122, 15);
        container.add(lblConfirmarSenha);

        JLabel lblDicaDaSenha = new JLabel("Dica da senha:");
        lblDicaDaSenha.setBounds(10, 162, 90, 14);
        container.add(lblDicaDaSenha);
        container.add(botaoCadastrar);
        container.add(botaoVoltar);
        container.add(botaoSair);
        getContentPane().add(container);

        JLabel lblCadastrese = new JLabel("Cadastre-se:");
        lblCadastrese.setHorizontalAlignment(SwingConstants.CENTER);
        lblCadastrese.setHorizontalTextPosition(SwingConstants.CENTER);
        lblCadastrese.setBounds(10, 9, 364, 14);
        container.add(lblCadastrese);

        JLabel label = new JLabel("");
        label.setIcon(new ImageIcon(TelaDeCadastro.class
                .getResource("/Files/conta-sem-tarifa.jpg")));
        label.setBounds(0, 0, 400, 300);
        container.add(label);
        pack();
    }

    public TextField getCampoConfirmaSenha() {

    public TextField getCampoNome() {

    public TextField getCampoEmail() {

    public TextField getCampoSenha() {

    public TextField getDicaDeSenha() {
}

Answer 1

不要将 KeyListener(或 MouseListener)与按钮一起使用。

按钮由 ActionListener API 支持，该 API 处理 Enter、Space、其他平台特定的激活按键、鼠标左键单击和助记符自动...

看看How to Use Buttons, Check Boxes, and Radio Buttons和 How to Write an Action Listener了解更多详情。

您还应该看看How to Use Root Panes ，因为 JRootPane 允许您定义一个“默认”按钮，当用户按下“激活”击键时该按钮将被激活。请注意，如果具有焦点的组件消耗该事件，它不会激活按钮

一般来说，您应该尽可能避免使用 KeyListener 并优先使用 key bindings API无论如何，还是