Java:如果AbstractTableModel插入行,如何显式地将行(数据)插入到JTable中

Question

在我的应用程序中有一个JTable,我想在创建表后插入行.

以下所有代码都在框架的构造函数中.

码:

private TableModel model = new AbstractTableModel(){
String[] columnNames = {"First Name","Last Name","Sport","# of Years","Vegetarian"};
private Object[][] data = {};

            public int getColumnCount() {
                return columnNames.length;
            }

            public int getRowCount() {
                return data.length;
            }

            public String getColumnName(int col) {
                return columnNames[col];
            }
            public Class getColumnClass(int c) {
                return getValueAt(0, c).getClass();
            }

            public Object getValueAt(int row, int col) {
                return data[row][col];
            }
            public boolean isCellEditable(int row, int col) {
                retuen false;
            }
            public Class getColumnClass(int c) {
                return getValueAt(0, c).getClass();
            }
};

table = new JTable(model);
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true);

JScrollPane scrollPane = new JScrollPane(table);
scrollPane.setBounds(5, 218, 884, 194);
//now adding this to the frame where I want to show 
frame.add(scrollPane);

现在我想在表中插入行或数据.这怎么可能.以前我使用过DefaultTableModel,但我们不能在DefaultTableModel中使用isCellEditable和其他方法,所以我用上面的代码改变了它.但是在上面的代码中我无法明确地插入数据(行),请帮助我.

Answer 1

像这样,你可以实现其他方法,如deleteRow(int rowIndex)和insertRowToIndex(int rowIndex,List rowData).

更改数据后重新记录,你必须触发表事件,如fireTableRowsInserted()等

public static class MyTableModel extends AbstractTableModel
{
    private List<String> columnNames = new ArrayList();
    private List<List> data = new ArrayList();

    {
        columnNames.add("First Name");
        columnNames.add("Last Name");
        columnNames.add("Sport");
        columnNames.add("# of Years");
        columnNames.add("Vegetarian");
    }

    public void addRow(List rowData)
    {
        data.add(rowData);
        fireTableRowsInserted(data.size() - 1, data.size() - 1);
    }

    public int getColumnCount()
    {
        return columnNames.size();
    }

    public int getRowCount()
    {
        return data.size();
    }

    public String getColumnName(int col)
    {
        try
        {
            return columnNames.get(col);
        }
        catch(Exception e)
        {
            return null;
        }
    }

    public Object getValueAt(int row, int col)
    {
        return data.get(row).get(col);
    }

    public boolean isCellEditable(int row, int col)
    {
        return false;
    }

    public Class getColumnClass(int c)
    {
        return getValueAt(0, c).getClass();
    }
};

public static void main(String[] args)
{
    MyTableModel model = new MyTableModel();

    model.addRow(Arrays.asList("yi", "chen", "sleep", 35, true));

    JTable table = new JTable(model);
    table.setPreferredScrollableViewportSize(new Dimension(500, 70));
    table.setFillsViewportHeight(true);

    JScrollPane scrollPane = new JScrollPane(table);
    scrollPane.setBounds(5, 218, 884, 194);
    //now adding this to the frame where I want to show 
    JFrame frame = new JFrame();
    frame.add(scrollPane);
    frame.setVisible(true);
}