Question

我在JScrollPane中有一个JTable。在调用我应该填充表格的函数后，我看不到任何变化！我试过table.repaint()，model.fireTableDataChanged()以及其他一些我不记得了的东西 - 没有用。我做错了什么？

我的功能：

public static void fillVodicTable(JTable table){

    DefaultTableModel model=new DefaultTableModel(); //also tried (DefaultTableModel)table.getModel();
    table.setModel(model);
    model.setColumnIdentifiers(new String[]{"Ime", "Priimek", "Epošta", "Datum rojstva", "Licenca", "Jeziki"});
    String [] row={"a","b","c","d","e","f"};

    model.addRow(row);
}

Answer 1

1）没有理由要求model.fireTableDataChanged()

DefaultTableModel

2）没有理由要求table.repaint()，是没用的

3）for(Jezik j : v.getTuji_jeziki()) row[5]+=", "+j.toString();您的问题可能超过100％ * *

4）DefaultTableModel适用于所有情况，但需要仅在EDT上更新，在另一方面，这是所有Swing JComponents的共同问题

5）为了更好的帮助，请尽快使用SSCCE

编辑您的问题

6）EDT == Event Dispatch Thread

7）SSCCE

的DefaultTableModel
model.addRow（行）;
短
自包含
更正
实施例

然后

import java.awt.*;
import java.awt.event.*;
import java.util.Random;
import javax.swing.*;
import javax.swing.border.LineBorder;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;

public class DefaultTableModelDemo {

    public static final String[] COLUMN_NAMES = {
        "Monday", "Tuesday", "Wednesday", "Thursday", "Friday"
    };
    private DefaultTableModel model = new DefaultTableModel(COLUMN_NAMES, 0);
    private JTable table = new JTable(model);
    private JPanel mainPanel = new JPanel(new BorderLayout());
    private Random random = new Random();

    public DefaultTableModelDemo() {
        JButton addDataButton = new JButton("Add Data");
        JPanel buttonPanel = new JPanel();
        buttonPanel.add(addDataButton);
        addDataButton.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                addDataActionPerformed();
            }
        });
        model = new DefaultTableModel(COLUMN_NAMES, 0) {

            private static final long serialVersionUID = 1L;

            @Override
            public Class getColumnClass(int column) {
                return getValueAt(0, column).getClass();
            }
        };
        table = new JTable(model) {

            private static final long serialVersionUID = 1L;

            @Override
            public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
                Component c = super.prepareRenderer(renderer, row, column);
                if (isRowSelected(row) && isColumnSelected(column)) {
                    ((JComponent) c).setBorder(new LineBorder(Color.red));
                }

                return c;
            }
        };
        mainPanel.add(new JScrollPane(table), BorderLayout.CENTER);
        mainPanel.add(buttonPanel, BorderLayout.SOUTH);
    }

    private void addDataActionPerformed() {
        for (int i = 0; i < 5; i++) {
            Object[] row = new Object[COLUMN_NAMES.length];
            for (int j = 0; j < row.length; j++) {
                row[j] = random.nextInt(5);
            }
            model.addRow(row);
        }
    }

    public JComponent getComponent() {
        return mainPanel;
    }

    public static void main(String[] args) {
        java.awt.EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                JFrame frame = new JFrame("DefaultTableModelDemo");
                frame.getContentPane().add(new DefaultTableModelDemo().getComponent());
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }
}

Answer 2

我知道它已经老了，但我遇到了同样的问题，解决办法是添加

jTable1.setAutoCreateColumnsFromModel(true);

Answer 3

1.填充jtable数据：

void update_table() throws SQLException {
   rs=statement.executeQuery("select * from details");
    jTable1.setModel(DbUtils.resultSetToTableModel(rs));

}

2。然后调用更新功能按钮动作事件并刷新jtable

有关更多信息，您可以查看本教程： How to refresh JTable after insert delete or update the data in java Netbeans ID

Answer 4

我做了一个新项目，因为我选择了一个新框架，然后将一个表格，一个标签，一个文本字段和一个按钮从摇摆控件拖到你的框架上。

2.在后端创建一个表...

从此链接下载rs2xml jar文件

Download rs2xml.jar

将其添加到项目库...

右键单击项目＆gt;属性＆gt;库＆gt;添加Jar /文件夹＆gt;选择jar＆gt;确定

5.然后使用以下代码连接mysql

public class DBConnect {

Connection connection = null;

public Connection getConnection() {
    try {
        Class.forName("com.mysql.jdbc.Driver");
        connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "");
        System.out.println("connection successfully");
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return connection;
}
}

使用以下代码

调用页面中的函数

con=new DBConnect();
statement=con.getConnection().createStatement();

7.然后创建更新功能，输入以下代码......

void update_table() throws SQLException{
    rs=statement.executeQuery("select * from details");
    jTable1.setModel(DbUtils.resultSetToTableModel(rs));
}

8.在按钮操作事件中，键入以下内容并调用更新功能

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         

   try {
       Object name=jTextField1.getText();
       String sql="insert into details (name) values('"+name+"')";
        int  resultset=statement.executeUpdate(sql);
        update_table();
   } catch (SQLException ex) {
       Logger.getLogger(update.class.getName()).log(Level.SEVERE, null, ex);
   }

}

9.然后运行项目......

您也可以按照本教程： -

How to refresh JTable after insert delete or update the data in java Netbeans ID

Answer 5

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
class JTableDemo extends JFrame implements ActionListener
{

JTable jt;
DefaultTableModel model;
JButton btn;
String[] cols={"Dno","DName","Loc"};
private JPanel mainPanel = new JPanel(new BorderLayout());

public JTableDemo()
{
    model=new DefaultTableModel(cols,0);
    btn=new JButton("Add Record");
    btn.addActionListener(this);
    jt=new JTable(model);
    btn.setBounds(10, 10, 150, 40);
    mainPanel.setBounds(10,200,300,200);
    add(btn);
    mainPanel.add(new JScrollPane(jt));
    add(mainPanel);
    setLayout(null);
    setSize(500, 600);
    setVisible(true);
}
public JComponent getComponent() {
    return mainPanel;
}
public void actionPerformed(ActionEvent e) {
    Object[] row = new Object[3];
    row[0]="10";
    row[1]="SW";
    row[2]="PKL";
    model.addRow(row);
}
public static void main(String[] args)
{
    new JTableDemo();
}

}

添加新行后，JTable不会刷新

5 个答案: