Jtable 不在运行时添加行

Question

我试图在运行时添加一行，但它一直在中断。 这只是一个让一切正常工作的简单测试。 它只会在将所有内容添加到表格后才会显示所有内容，但在此之前会显示一个黑色窗口。

public static void main(String[] args) throws IOException, InterruptedException{
    JFrame dashboard = new JFrame("Dashboard");
    dashboard.setVisible(true); 
    dashboard.setTitle("Dashboard Information");
    dashboard.setBounds((960 - 250), (540 - 250), 500, 500);

    DefaultTableModel model = new DefaultTableModel();
    JTable table = new JTable(model);
    dashboard.add(new JScrollPane(table));

    model.addColumn("Col2");
    model.addColumn("Col1");
    model.addColumn("Col3");
    model.addRow(new Object[] {"test", 1, "test"});
    for (int i = 0; i < 10; i++) {
        model.addRow(new Object[] {"test2", 2, "test2"});
        Thread.sleep(100);
    }

    dashboard.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    dashboard.pack();

    }

Answer 1

Jframe仅在我们添加行Jframe被打包，这意味着该表不会出现，因为我们还没有完成它！ 将dashboard.pack()或Jframe.pack()到循环上方和dashboard.add(new JScrollPane(table));下方dashboard.add(new JScrollPane(table)); 首先使表存在，然后在运行时正确添加行。

public static void main(String[] args) throws IOException, InterruptedException{
    JFrame dashboard = new JFrame("Dashboard");
    dashboard.setVisible(true); 
    dashboard.setTitle("Dashboard Information");
    dashboard.setBounds((960 - 250), (540 - 250), 500, 500);

    DefaultTableModel model = new DefaultTableModel();
    JTable table = new JTable(model);
    dashboard.add(new JScrollPane(table));
    //move lines to here
    dashboard.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    dashboard.pack();

    model.addColumn("Col2");
    model.addColumn("Col1");
    model.addColumn("Col3");
    model.addRow(new Object[] {"test", 1, "test"});
    for (int i = 0; i < 10; i++) {
        model.addRow(new Object[] {"test2", 2, "test2"});
        Thread.sleep(100);
    }
    //put these lines beofore we add rows to the table
    //dashboard.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    //dashboard.pack();

    }