从JTextField到JTable的数据 [英] Data from JTextField to JTable

问题描述

我想将在文本框中输入的数据添加到表格中，并保持ID递增.单击添加"按钮时，将添加数据.

    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;

    public class ex1 extends JFrame {
    GridLayout experimentLayout = new GridLayout(3, 3);
    private javax.swing.JButton jButton1,jButton2,jButton3;
    private javax.swing.JLabel jLabel1, jLabel2, jLabel3;

    private javax.swing.JTextField jTextField1,jTextField2,jTextField3;

    String columns[] = {"ID","Name","Age","Gender"};
    Object data[][] = {
            {"0","Tom",new Integer(20),"Male"},
            {"1","Tina", new Integer(18), "Female"},
            {"2","Raj",new Integer(19),"Male"}

    };

    public void addComponentsToPane(final Container pane) {
        final JPanel compsToExperiment = new JPanel();

        compsToExperiment.setLayout(experimentLayout);
        JPanel controls = new JPanel();
        controls.setLayout(new GridLayout(8, 3));

        jLabel1 = new javax.swing.JLabel("Name: ");
        jLabel2 = new javax.swing.JLabel("Age: ");
        jLabel3 = new javax.swing.JLabel("Gender: ");
        jTextField1 = new javax.swing.JTextField();
        jTextField2 = new javax.swing.JTextField();
        jTextField3 = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton("Add");
        jButton2 = new javax.swing.JButton("Next");
        jButton3 = new javax.swing.JButton("Per");

        compsToExperiment.add(jLabel1);
        compsToExperiment.add(jLabel2);
        compsToExperiment.add(jLabel3);

        compsToExperiment.add(jTextField1);
        compsToExperiment.add(jTextField2);
        compsToExperiment.add(jTextField3);
        compsToExperiment.add(jButton1);

        JTable table = new JTable(data,columns);
        controls.add(table.getTableHeader());
        controls.add(table);
            pane.add(compsToExperiment, BorderLayout.NORTH);
        pane.add(controls, BorderLayout.CENTER);
    }

    /**
     * Create the GUI and show it. For thread safety, this method is invoked
     * from the event dispatch thread.
     */
    private static void createAndShowGUI() {        
        ex1 frame = new ex1();      
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   
        frame.addComponentsToPane(frame.getContentPane());
        frame.setSize(500,500);
        //frame.pack();     
        frame.setVisible(true);
    }

    public static void main(String[] args) {

        try {           
            UIManager.setLookAndFeel(
                "javax.swing.plaf.metal.MetalLookAndFeel");
        } catch (UnsupportedLookAndFeelException ex) {
            ex.printStackTrace();
        } catch (IllegalAccessException ex) {
            ex.printStackTrace();
        } catch (InstantiationException ex) {
            ex.printStackTrace();
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        }
        /* Turn off metal's use of bold fonts */
        UIManager.put("swing.boldMetal", Boolean.FALSE);

        // Schedule a job for the event dispatch thread:
        // creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

我知道设计已经遍及了我刚刚开始学习Java的所有地方，请随时指出可以进行的改进. 预先谢谢您:)

解决方案

要添加在JTextFields中输入的数据，您需要在添加按钮(在本例中为jButton1)中注册ActionListener.

要将条目添加到表模型中，可以使用可变模型，例如DefaultTableModel:

DefaultTableModel model = new DefaultTableModel(data, columns);

在ActionListener的actionPerformed方法中，您将拥有:

String nextRowId = Integer.toString(model.getRowCount());
model.addRow(new Object[] { 
              nextRowId, 
              jTextField1.getText(), 
              jTextField2.getText(), 
              jTextField3.getText() });

建议以下内容:

• 为变量使用更有意义的名称.
• 为JTable分配更多空间，这可能会保存大量数据.还要放在JScrollPane内.

I would like to add the data entered in the text box to the table and keep on incremented ID. the data is added when the button "Add" is clicked.

    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;

    public class ex1 extends JFrame {
    GridLayout experimentLayout = new GridLayout(3, 3);
    private javax.swing.JButton jButton1,jButton2,jButton3;
    private javax.swing.JLabel jLabel1, jLabel2, jLabel3;

    private javax.swing.JTextField jTextField1,jTextField2,jTextField3;

    String columns[] = {"ID","Name","Age","Gender"};
    Object data[][] = {
            {"0","Tom",new Integer(20),"Male"},
            {"1","Tina", new Integer(18), "Female"},
            {"2","Raj",new Integer(19),"Male"}

    };

    public void addComponentsToPane(final Container pane) {
        final JPanel compsToExperiment = new JPanel();

        compsToExperiment.setLayout(experimentLayout);
        JPanel controls = new JPanel();
        controls.setLayout(new GridLayout(8, 3));

        jLabel1 = new javax.swing.JLabel("Name: ");
        jLabel2 = new javax.swing.JLabel("Age: ");
        jLabel3 = new javax.swing.JLabel("Gender: ");
        jTextField1 = new javax.swing.JTextField();
        jTextField2 = new javax.swing.JTextField();
        jTextField3 = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton("Add");
        jButton2 = new javax.swing.JButton("Next");
        jButton3 = new javax.swing.JButton("Per");

        compsToExperiment.add(jLabel1);
        compsToExperiment.add(jLabel2);
        compsToExperiment.add(jLabel3);

        compsToExperiment.add(jTextField1);
        compsToExperiment.add(jTextField2);
        compsToExperiment.add(jTextField3);
        compsToExperiment.add(jButton1);

        JTable table = new JTable(data,columns);
        controls.add(table.getTableHeader());
        controls.add(table);
            pane.add(compsToExperiment, BorderLayout.NORTH);
        pane.add(controls, BorderLayout.CENTER);
    }

    /**
     * Create the GUI and show it. For thread safety, this method is invoked
     * from the event dispatch thread.
     */
    private static void createAndShowGUI() {        
        ex1 frame = new ex1();      
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   
        frame.addComponentsToPane(frame.getContentPane());
        frame.setSize(500,500);
        //frame.pack();     
        frame.setVisible(true);
    }

    public static void main(String[] args) {

        try {           
            UIManager.setLookAndFeel(
                "javax.swing.plaf.metal.MetalLookAndFeel");
        } catch (UnsupportedLookAndFeelException ex) {
            ex.printStackTrace();
        } catch (IllegalAccessException ex) {
            ex.printStackTrace();
        } catch (InstantiationException ex) {
            ex.printStackTrace();
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        }
        /* Turn off metal's use of bold fonts */
        UIManager.put("swing.boldMetal", Boolean.FALSE);

        // Schedule a job for the event dispatch thread:
        // creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

I know the the design is all over the place I've just started learning java, feel free to point out improvement that can made. Thank you in advance :)

解决方案

To add the data entered in the JTextFields you will need to register an ActionListener to your add button, in this case jButton1.

To add entries to your table model you could use a mutable model such as DefaultTableModel:

DefaultTableModel model = new DefaultTableModel(data, columns);

In the actionPerformed method of your ActionListener you will have:

String nextRowId = Integer.toString(model.getRowCount());
model.addRow(new Object[] { 
              nextRowId, 
              jTextField1.getText(), 
              jTextField2.getText(), 
              jTextField3.getText() });

The following are recommended:

• Use more meaningful names for variables.
• Allocate more space to the JTable which could potentially hold a large amount of data. Also place inside a JScrollPane.

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