Java 如何将一行数据插入JTable？

我试图在JTable的顶行插入数据。固定大小的桌子。我确实让它工作了，但如果我在一张10排的桌子上工作的话。代码将非常笨拙

我对这个很陌生，请暂时不要lambda。（如有可能） 非常感谢。再见，我需要睡觉

/**
 * A basic 3x3 JTable within JFrame inserting data from top row
 */
public class TestCode extends JTable {

    private JTable table;

    // Insert at row zero and push other row by one row
    public void insertRowZero() {
        String one, two, three;
        one = "numone";
        two = "numtwo";
        three = "numthree";

        // get row 1 and paste into row 2
        table.setValueAt(table.getValueAt(1, 0).toString(), 2, 0);
        table.setValueAt(table.getValueAt(1, 1).toString(), 2, 1);
        table.setValueAt(table.getValueAt(1, 2).toString(), 2, 2);

        // get row 0 and paste into row 1
        table.setValueAt(table.getValueAt(0, 0).toString(), 1, 0);
        table.setValueAt(table.getValueAt(0, 1).toString(), 1, 1);
        table.setValueAt(table.getValueAt(0, 2).toString(), 1, 2);

        // not actually insert, but does the job
        table.setValueAt(one, 0, 0);
        table.setValueAt(two, 0, 1);
        table.setValueAt(three, 0, 2);
        table.repaint();
    }

    // Create a fixed size table, 3 row and 3 column
    public void createTable() {
        String[] columnName = {"x", "y", "z"};  // column row doesn't show ?
        Object[][] data = {
            {"r0-c0", "r0-c1", "r0-c2"},
            {"r1-c0", "r1-c1", "r1-c2"},
            {"r2-c0", "r2-c1", "r2-c2"}
        };

        JFrame frame = new JFrame();
        frame.setSize(300, 100);
        table = new JTable(data, columnName);
        frame.add(table);
        frame.setVisible(true);

        try {
            Thread.sleep(2000);
        } catch (InterruptedException ex) {
            Logger.getLogger(TestCode.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    public TestCode() {
        // construct
        createTable();
        insertRowZero();
    }

    public static void main(String[] args) {
        // just a start point
        new TestCode();
    }
}

好吧，我跟着-。 很好地解决了，谢谢。信息量很大。 此代码是预期的。（差不多）

1） 使用

DefaultTableModel

保存数据。2） 使用

DefaultTableModel

的

insertRow（…）

方法插入一行数据。3） 不要扩展JTable。只有在向类添加功能时，才能扩展类。您没有添加功能。4） 不需要使用table.repaint（）。当组件的属性更改或组件的模型更改时，所有Swing组件将自动重新绘制自己。。

/**
 * A basic 3x3 JTable within JFrame inserting data from top row
 */
public class TestCode {

    private DefaultTableModel tm;

    // Insert at row zero and push other row by one row
    // and remove row three
    public void insertRowZero() {
        tm.insertRow(0, new Object[]{"numone", "numtwo", "numthree"});
        tm.removeRow(3);
    }

    // Create a fixed size table, 3 row and 3 column
    public void createTable() {
        tm = new DefaultTableModel();
        JTable table = new JTable(tm);
        tm.addColumn("x");
        tm.addColumn("y");
        tm.addColumn("z");
        tm.insertRow(0, new Object[]{"r0-c0", "r0-c1", "r0-c2"});
        tm.insertRow(1, new Object[]{"r1-c0", "r1-c1", "r1-c2"});
        tm.insertRow(2, new Object[]{"r2-c0", "r2-c1", "r2-c2"});

        JFrame frame = new JFrame();
        frame.setSize(300, 100);
        frame.add(table);
        frame.add(new JScrollPane(table));  // needed to show column header
        frame.setVisible(true);             // don't really want scroll pane

        try {
            Thread.sleep(2000);
        } catch (InterruptedException ex) {
            Logger.getLogger(TestCode.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    public TestCode() {
        // construct
        createTable();
        insertRowZero();
    }

    public static void main(String[] args) {
        // just a start point
        new TestCode();
    }
}