将信息从一个 jframe 传递到另一个

Question

首先，我知道使用多个 jframe 是不受欢迎的，不幸的是我已经让自己深入到这个项目中重新开始。我的问题是我找不到将数据（用户输入）从一帧传输到另一帧的方法，我将提供我需要从第一帧传输到另一帧的代码

这是他们必须输入的姓名和电子邮件的代码

    JTextArea txtrEnterYourFull = new JTextArea();
    txtrEnterYourFull.setEditable(false);
    txtrEnterYourFull.setFont(new Font("Lucida Grande", Font.PLAIN, 15));
    txtrEnterYourFull.setBackground(Color.GRAY);
    txtrEnterYourFull.setText("Enter your full name");
    txtrEnterYourFull.setBounds(52, 58, 166, 29);
    frame.getContentPane().add(txtrEnterYourFull);



    nameL = new JTextField();
    nameL.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {

        }
    }
    );
    nameL.setBackground(Color.LIGHT_GRAY);
    nameL.setBounds(52, 93, 284, 26);
    frame.getContentPane().add(nameL);
    nameL.setColumns(10);


    JTextArea txtroptionalEnterYour = new JTextArea();
    txtroptionalEnterYour.setEditable(false);
    txtroptionalEnterYour.setFont(new Font("Lucida Grande", Font.PLAIN, 15));
    txtroptionalEnterYour.setBackground(Color.GRAY);
    txtroptionalEnterYour.setText("(Optional) Enter your email");
    txtroptionalEnterYour.setBounds(52, 139, 193, 29);
    frame.getContentPane().add(txtroptionalEnterYour);

    textField_1 = new JTextField();
    textField_1.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {

        }

这是进入新框架的按钮代码

    JButton btnContinue = new JButton("Continue");
    btnContinue.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {


            frame2 fram = new frame2 ();
            fram.setVisible(true);
            frame.dispose();

我是摇摆新手，我不需要有人来完成我的程序。我只需要知道如何将它转移到新框架上的新文本框。

Answer 1

这样做相当容易。您需要做的就是设置一个构造函数，在该构造函数中将带有所需值的框架传递给新框架。

例如，我有一个 LoginScreen.java 和 DoctorScreen.java。如果我的用户成功输入了他的详细信息并登录，我将一个医生的 ArrayList 从一个 JFrame 传输到另一个 JFrame，或者更准确地说，通过创建该类的新实例从一个 java 类传输到另一个

此处为示例

将一个数组列表从 LoginScreen.java 传递给 DoctorScreen.java

DoctorScreen dScreen = new DoctorScreen(frame, docList,d);

现在获取从 LoginScreen.java 传递的那些值并在 DoctorScreen.java 中设置它们

public DoctorScreen(JFrame frame, ArrayList<Doctor> docList, Doctor d) {
    // TODO Auto-generated constructor stub
    dialog = new JFileChooser(System.getProperty("user.dir"));
    this.frame = frame;
    this.docList = docList;
    this.d = d;
    initialize();
}

现在，您可以更改 DoctorScreen 构造函数以适应您尝试执行的任何项目。

我建议您采取的步骤是创建一个 Java 文件来处理您的输入，并创建第二个 Java 文件来显示您在第一个文件中输入的内容

EG：

JButton btnContinue = new JButton("Continue");
btnContinue.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
       String field1 = txtrEnterYourFull.getText();
       String name = nameL.getText();
       String field2 = txtroptionalEnterYour.getText();

       Display display = new Display(name, field1, field2);//using this as example
}

}

然后在你的 display.java 中，调用你的构造函数来接收这些字段并将它们显示在文本字段/文本区域或框架中的 JLabel 中

 String name, field1, field2;

 public Display(String name, String field1, String field2){

     this.name = name;
     this.field1 = field1;
     this.field2 - field2;
 }

请注意，这些变量已经被声明了，我只是将其用于演示目的。

Answer 2

框架与任何其他类一样，因此只需使用与在任何其他类之间传递数据相同的策略即可。例如，您可以简单地在您的第二个框架类中创建 setter 方法并从第一个框架调用它们。

注意：这只是我在 Netbeans 中快速拼凑的东西，因此生成了很多代码。另外，这只是一个严格的例子，我并不是说它一定是最好的方法。

下面是一个快速而肮脏的示例，说明如何在两个 JFrame 对象之间传递数据：

这是Frame1中要注意的代码：

private void sendToOtherFrameBtnActionPerformed(java.awt.event.ActionEvent evt) {                                                    
        Frame2 otherFrame = new Frame2();
        otherFrame.setTextFieldText(jTextField1.getText());
        otherFrame.setTextAreaText(jTextArea1.getText());
        otherFrame.setVisible(true);
    }  

这是 Frame1 的完整代码：

public class Frame1 extends javax.swing.JFrame {

    /**
     * Creates new form Frame1
     */
    public Frame1() {
        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() {

        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();
        jTextField1 = new javax.swing.JTextField();
        sendToOtherFrameBtn = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jTextArea1.setText("text area data");
        jScrollPane1.setViewportView(jTextArea1);

        jTextField1.setText("text field data");

        sendToOtherFrameBtn.setText("Send To Other Frame");
        sendToOtherFrameBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                sendToOtherFrameBtnActionPerformed(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()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(99, 99, 99)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 166, javax.swing.GroupLayout.PREFERRED_SIZE)))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(115, 115, 115)
                        .addComponent(sendToOtherFrameBtn)))
                .addContainerGap(135, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addGap(35, 35, 35)
                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(37, 37, 37)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 37, Short.MAX_VALUE)
                .addComponent(sendToOtherFrameBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(31, 31, 31))
        );

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

    private void sendToOtherFrameBtnActionPerformed(java.awt.event.ActionEvent evt) {                                                    
        Frame2 otherFrame = new Frame2();
        otherFrame.setTextFieldText(jTextField1.getText());
        otherFrame.setTextAreaText(jTextArea1.getText());
        otherFrame.setVisible(true);
    }                                                   

    /**
     * @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(Frame1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Frame1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Frame1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Frame1.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 Frame1().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JButton sendToOtherFrameBtn;
    // End of variables declaration                   
}

这是 Frame2 中的重要代码：

public void setTextFieldText(String txt){
    jTextField1.setText(txt);
}

public void setTextAreaText(String txt){
    jTextArea1.setText(txt);
}

这是 Frame2 的完整代码：

public class Frame2 extends javax.swing.JFrame {

    /**
     * Creates new form Frame2
     */
    public Frame2() {
        initComponents();
    }

    public void setTextFieldText(String txt){
        jTextField1.setText(txt);
    }

    public void setTextAreaText(String txt){
        jTextArea1.setText(txt);
    }

    /**
     * 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() {

        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();
        jTextField1 = new javax.swing.JTextField();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jScrollPane1.setViewportView(jTextArea1);

        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(111, 111, 111)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(jScrollPane1)
                    .addComponent(jTextField1))
                .addContainerGap(123, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap(52, Short.MAX_VALUE)
                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(33, 33, 33)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(99, 99, 99))
        );

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

    /**
     * @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(Frame2.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Frame2.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Frame2.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Frame2.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 Frame2().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JTextField jTextField1;
    // End of variables declaration                   
}