Java 如何在NetBeans GUI中提交带有Enter键的按钮

我在这里看到过其他帖子，但我不明白如何在我的代码中做到这一点。另外，我想知道如果我有3个按钮，它们都可以用Enter键点击吗

我的代码：

public class Gadhagasker extends javax.swing.JFrame {

/**
 * Creates new form Gadhagasker
 */
public Gadhagasker() {
    initComponents();
}

/**
 * This method is called from within the constructor to initialize the form.
 * WARNING: Do NOT modify this code. The content of this method is always
 * regenerated by the Form Editor.
 */
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">                          
private void initComponents() {

    jLabel1 = new javax.swing.JLabel();
    jLabel2 = new javax.swing.JLabel();
    jLabel3 = new javax.swing.JLabel();
    jTextField1 = new javax.swing.JTextField();
    jTextField2 = new javax.swing.JTextField();
    jButton1 = new javax.swing.JButton();
    jButton2 = new javax.swing.JButton();
    jButton3 = new javax.swing.JButton();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
    setBackground(new java.awt.Color(51, 51, 255));

    jLabel1.setFont(new java.awt.Font("Tahoma", 1, 24)); // NOI18N
    jLabel1.setText("Gadhagasker");

    jLabel2.setBackground(new java.awt.Color(204, 255, 255));
    jLabel2.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jLabel2.setText("User");

    jLabel3.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jLabel3.setText("Gadhagasker");

    jTextField2.setEditable(false);
    jTextField2.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jTextField2ActionPerformed(evt);
        }
    });

    jButton1.setText("Enter");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton1ActionPerformed(evt);
        }
    });

    jButton2.setText("Clear");
    jButton2.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton2ActionPerformed(evt);
        }
    });

    jButton3.setText("Exit");
    jButton3.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton3ActionPerformed(evt);
        }
    });

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGap(30, 30, 30)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 61, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jLabel3))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                .addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 466, Short.MAX_VALUE)
                .addComponent(jTextField2))
            .addContainerGap())
        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
            .addGap(0, 242, Short.MAX_VALUE)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jLabel1)
                    .addGap(370, 370, 370))
                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                    .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 100, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGap(127, 127, 127)
                    .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 101, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGap(89, 89, 89))))
        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addComponent(jButton3, javax.swing.GroupLayout.PREFERRED_SIZE, 102, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(198, 198, 198))
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addContainerGap()
            .addComponent(jLabel1)
            .addGap(39, 39, 39)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jLabel2)
                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addGap(18, 18, 18)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jLabel3)
                .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addGap(56, 56, 56)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 40, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 40, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addGap(30, 30, 30)
            .addComponent(jButton3, javax.swing.GroupLayout.PREFERRED_SIZE, 39, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(140, Short.MAX_VALUE))
    );

    pack();
}// </editor-fold>                        

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    // TODO add your handling code here:
    String Give = jTextField1.getText();
    String[] Answer = {"Hi", "My name is Gadhagasker.", "I am fine.", "My breakfast was awesome.", "The computer where I am in now.", "Yes, but I am not ready to be responsive yet.", "Oh, upto 16 till now.", "You are my user.", "Sorry, I cannot do much.", "Ask my name again :)", "I have no sex.", "That is how I was made.", "My developer is working on it.", "I will give no more new answers.", "You are welcome.", "Please be calm.", "lol, haha", "Good Bye"};
    String[] Question = {"hi", "what is your name?", "how are you?", "how was your breakfast?", "whom do you love most?", "will you ask my name?", "how many questions can i ask you?", "can you tell me who i am?", "i am bored with you.", "i do not know what more to ask.", "are you male or female?", "You are an idiot.", "You need improvement.", "if i ask 16 questions, what would happen?", "thank you!", "go away.", "i am laughing at you.", "good bye!"};
    for (int j = 0; j < Question.length - 14; j++) {
        int a = 0;
        String question = Give.toLowerCase();
        for (int i = 0; i < Question.length; i++) {

              if (question.equals(Question[i])) {
                jTextField2.setText(Answer[i]);
                a = 1;
                break;
            }

        }
        if (a == 0 && !question.equals("")) {
            jTextField2.setText("Sorry, I cannot answer that, I am still learning.");
        }
        if (j == 15) {
            jTextField2.setText("I am done.");
        }
    }
}                                        

private void jTextField2ActionPerformed(java.awt.event.ActionEvent evt) {                                            
    // TODO add your handling code here:
}                                           

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    // TODO add your handling code here:
    jTextField1.setText("");
    jTextField2.setText("");
}                                        

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    // TODO add your handling code here:
    System.exit(0);
}                                        

/**
 * @param args the command line arguments
 */
public static void main(String args[]) {
    /* Set the Nimbus look and feel */
    //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
    /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
     * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
     */
    try {
        for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
            if ("Nimbus".equals(info.getName())) {
                javax.swing.UIManager.setLookAndFeel(info.getClassName());
                break;
            }
        }
    } catch (ClassNotFoundException ex) {
        java.util.logging.Logger.getLogger(Gadhagasker.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
        java.util.logging.Logger.getLogger(Gadhagasker.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
        java.util.logging.Logger.getLogger(Gadhagasker.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        java.util.logging.Logger.getLogger(Gadhagasker.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    //</editor-fold>

    /* Create and display the form */
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new Gadhagasker().setVisible(true);
        }
    });
}

// Variables declaration - do not modify                     
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
// End of variables declaration                   
}

公共类Gadhagasker扩展了javax.swing.JFrame{
/**
*创造新的形式加达加斯克
*/
公共Gadhagasker（）{
初始化组件（）；
}
/**
*从构造函数中调用此方法来初始化表单。
*警告：不要修改此代码。此方法的内容始终为
*由表单编辑器重新生成。
*/
@抑制警告（“未选中”）
//                           
私有组件（）{
jLabel1=newjavax.swing.JLabel（）；
jLabel2=newjavax.swing.JLabel（）；
jLabel3=newjavax.swing.JLabel（）；
jTextField1=newjavax.swing.JTextField（）；
jTextField2=newjavax.swing.JTextField（）；
jButton1=newjavax.swing.JButton（）；
jButton2=newjavax.swing.JButton（）；
jButton3=newjavax.swing.JButton（）；
setDefaultCloseOperation（javax.swing.WindowConstants.EXIT_ON_CLOSE）；
挫折背景（新java.awt.Color（51,51,255））；
jLabel1.setFont（新的java.awt.Font（“Tahoma”，1，24））；//NOI18N
jLabel1.setText（“Gadhagasker”）；
setBackground（新java.awt.Color（204255255））；
jLabel2.setFont（新的java.awt.Font（“Tahoma”，1，18））；//NOI18N
jLabel2.setText（“用户”）；
jLabel3.setFont（新的java.awt.Font（“Tahoma”，1，18））；//NOI18N
jLabel3.setText（“Gadhagasker”）；
jTextField2.setEditable（false）；
jTextField2.addActionListener（新java.awt.event.ActionListener（）{
public void actionPerformed（java.awt.event.ActionEvent evt）{
jTextField2ActionPerformed（evt）；
}
});
jButton1.setText（“输入”）；
jButton1.addActionListener（新java.awt.event.ActionListener（）{
public void actionPerformed（java.awt.event.ActionEvent evt）{
jButton1ActionPerformed（evt）；
}
});
jButton2.setText（“清除”）；
jButton2.addActionListener（新java.awt.event.ActionListener（）{
public void actionPerformed（java.awt.event.ActionEvent evt）{
jButton2ActionPerformed（evt）；
}
});
jButton3.setText（“退出”）；
jButton3.addActionListener（新java.awt.event.ActionListener（）{
public void actionPerformed（java.awt.event.ActionEvent evt）{
JButton3执行的操作（evt）；
}
});
javax.swing.GroupLayout=newjavax.swing.GroupLayout（getContentPane（））；
getContentPane（）.setLayout（布局）；
layout.setHorizontalGroup(
createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（layout.createSequentialGroup（）
.addGap（30,30,30）
.addGroup（layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addComponent（jLabel2，javax.swing.GroupLayout.PREFERRED_SIZE，61，javax.swing.GroupLayout.PREFERRED_SIZE）
.addComponent（jLabel3））
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.RELATED，javax.swing.GroupLayout.DEFAULT\u SIZE，Short.MAX\u值）
.addGroup（layout.createParallelGroup（javax.swing.GroupLayout.Alignment.training，false）
.addComponent（jTextField1，javax.swing.GroupLayout.DEFAULT_SIZE，466，Short.MAX_值）
.addComponent（jTextField2））
.addContainerGap（））
.addGroup（javax.swing.GroupLayout.Alignment.TRAILING，layout.createSequentialGroup（）
.addGap（0，242，短.MAX_值）
.addGroup（layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（layout.createSequentialGroup（）
.addComponent（jLabel1）
.addGap（370370370370））
.addGroup（javax.swing.GroupLayout.Alignment.TRAILING，layout.createSequentialGroup（）
.addComponent（jButton1，javax.swing.GroupLayout.PREFERRED_SIZE，100，javax.swing.GroupLayout.PREFERRED_SIZE）
.addGap（127、127、127）
.addComponent（jButton2，javax.swing.GroupLayout.PREFERRED_SIZE，101，javax.swing.GroupLayout.PREFERRED_SIZE）
.addGap（89,89,89）））
.addGroup（javax.swing.GroupLayout.Alignment.TRAILING，layout.createSequentialGroup（）
.addContainerGap（javax.swing.GroupLayout.DEFAULT\u SIZE，Short.MAX\u值）
.addComponent（jButton3，javax.swing.GroupLayout.PREFERRED_SIZE，102，javax.swing.GroupLayout.PREFERRED_SIZE）
.addGap（198198198198198））
);
layout.setVerticalGroup(
createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（layout.createSequentialGroup（）
.addContainerGap（）
.addComponent（jLabel1）
.addGap（39,39,39）
.addGroup（layout.createParallelGroup（javax.swing.GroupLayout.Alignment.BASELINE）
.addComponent（jLabel2）
.addComponent（jTextField1，javax.swing.GroupLayout.PREFERRED_SIZE，javax.swing.GroupLayout.DEFAULT_SIZE，javax.swing.GroupLayout.PREFERRED_SIZE））
.addGap（18,18,18）
.addGroup（layout.createParallelGroup（javax.swing.GroupLayout.Alignment.BASELINE）
.addComponent（jLabel3）
.addComponent（jTextField2，javax.swing.GroupLayout.PREFERRED_SIZE，javax.swing.GroupLayout.DEFAULT_SIZE，javax.swing.GroupLayout.PREFERRED_SIZE））
.addGap（56,56,56）
.addGroup（layout.createParallelGroup（javax.swing.GroupLayout.Alignment.BASELINE）
.addComponent（jButton1，javax.swing.GroupLayout.PREFERRED_SIZE，40，javax.swing.GroupLayout.PREFERRED_SIZE）
.addComponent（jButton2，javax.swing.GroupLayout.PREFERRED_SIZE，40，javax.swing.GroupLayout.PREFERRED_SIZE））
.addGap（30,30,30）
.addComponent（jButton3，javax.swing.GroupLayout.PREFERRED_SIZE，39，javax.swing.GroupLayout.PREFERRED_SIZE）
addContainerGa先生