Question

我创建了一个简单的注册表单，将Name，Gender和city添加到表中，但我在这里遇到了一些问题。当我单击表单左上角的最大化按钮时，我的表格才会刷新。

package test;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.io.IOException;
import java.util.*;

import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JLayeredPane;
import javax.swing.JList;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JRadioButtonMenuItem;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;

public class Main extends JFrame{
    private Vector<String> columnNames = new Vector<String>();
    private Vector data = new Vector<>();
    private Vector<Vector> details = new Vector<Vector>();

    private DefaultTableModel dtm = new DefaultTableModel(details, columnNames);
    private JTable table = new JTable(dtm); 
    private JScrollPane spane = new JScrollPane(table);

    private JTextField field1 = new JTextField("Nama");
    private JTextField field2 = new JTextField("Gender");
    private JTextField field3 = new JTextField("City");
    private JButton ok = new JButton("Ok");

    JPanel panelForm = new JPanel(new GridLayout(1,4));

    Main(){
        columnNames.add("Nama");
        columnNames.add("city");
        columnNames.add("Gender");

        data.add("Dodi");
        data.add("Jakrta");
        data.add("Laki");
        details.add(data);

        panelForm.add(field1);
        panelForm.add(field2);
        panelForm.add(field3);
        panelForm.add(ok);


        ok.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                data = new Vector<>();
                data.add(field1.getText());
                data.add(field2.getText());
                data.add(field3.getText());

                details.add(data);
            }
        });

        dtm = new DefaultTableModel(details, columnNames);
        table = new JTable(dtm); 
        spane.setViewportView(table);
        add(panelForm, BorderLayout.SOUTH);
        add(spane, BorderLayout.CENTER);

        setTitle("Registration");
        setSize(300, 300);
        setLocationRelativeTo(null);
        setVisible(true);

    }

    public static void main(String[] args) {
        new Main();

    }

}

Answer 1

将新行添加到TableModel而不是Vector，将details.add(data);方法中的下一行actionPerformed()替换为dtm.addRow(data);。

向TableModel添加行后，会触发事件以进行刷新。

Answer 2

要添加行，您需要致电dtm.addRow(data);并在DefaultTableModel而不是列表中添加行。

因此更新的代码如下所示：

 ok.addActionListener(new ActionListener() {

        @Override
        public void actionPerformed(ActionEvent e) {
            data = new Vector<>();
            data.add(field1.getText());
            data.add(field2.getText());
            data.add(field3.getText());


            dtm.addRow(data);
        }
    });

我的Jtable没有刷新

2 个答案: