Question

这是我可笑的。

private JTable getJTable() {
    String[] colName = { "Name", "Email", "Contact No. 1", "Contact No. 2",
            "Group", "" };
    if (jTable == null) {
        jTable = new JTable() {
            public boolean isCellEditable(int nRow, int nCol) {
                return false;
            }
        };
    }
    DefaultTableModel contactTableModel = (DefaultTableModel) jTable
            .getModel();
    contactTableModel.setColumnIdentifiers(colName);
    jTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    return jTable;
}

我将采用这一方法从数据库中检索数据,并将其输入表格模型。

public void setUpTableData() {
    DefaultTableModel tableModel = (DefaultTableModel) jTable.getModel();
    ArrayList<Contact> list = new ArrayList<Contact>();
    if (!con.equals(""))
        list = sql.getContactListsByGroup(con);
    else
        list = sql.getContactLists();
    for (int i = 0; i < list.size(); i++) {
        String[] data = new String[7];

            data[0] = list.get(i).getName();
            data[1] = list.get(i).getEmail();
            data[2] = list.get(i).getPhone1();
            data[3] = list.get(i).getPhone2();
            data[4] = list.get(i).getGroup();
            data[5] = list.get(i).getId();

        tableModel.addRow(data);
    }
    jTable.setModel(tableModel);
}

目前,我正在使用这一方法更新表格数据后重新编制表格。我将首先明确表格。

DefaultTableModel tableModel = (DefaultTableModel) jTable.getModel();
tableModel.setRowCount(0);

之后再对表格模式进行重组,以更新碎块。但我想到的是,在这方面是否有任何最佳做法或更好的办法?

Answer 1

If you want to notify your JTable about changes of your data, use
tableModel.fireTableDataChanged()

http://docs.oracle.com/javase/7/docs/api/javax/swing/table/AbstractTableModel.html#fireTableDataChanged%2829“rel=“noreferer”>:

证明所有听众在桌旁的所有细胞价值可能已经发生变化。浏览量也可能有所变化,JTable公司应当从零页上重新绘制表格。表格的结构(按各栏顺序排列)假定相同。

Answer 2

更快捷的做法是:

    jTable.repaint(); // Repaint all the component (all Cells).

a. 当一个或几个细胞改变时,优化方式:

    ((AbstractTableModel) jTable.getModel()).fireTableCellUpdated(x, 0); // Repaint one cell.

Answer 3

审判

public void setUpTableData() {
    DefaultTableModel tableModel = (DefaultTableModel) jTable.getModel();

    /**
    * additional code.
    **/
    tableModel.setRowCount(0);
    /**/
    ArrayList<Contact> list = new ArrayList<Contact>();
    if (!con.equals(""))
        list = sql.getContactListsByGroup(con);
    else
        list = sql.getContactLists();
    for (int i = 0; i < list.size(); i++) {
        String[] data = new String[7];

        data[0] = list.get(i).getName();
        data[1] = list.get(i).getEmail();
        data[2] = list.get(i).getPhone1();
        data[3] = list.get(i).getPhone2();
        data[4] = list.get(i).getGroup();
        data[5] = list.get(i).getId();

        tableModel.addRow(data);
    }
    jTable.setModel(tableModel);
    /**
    * additional code.
    **/
    tableModel.fireTableDataChanged();
    /**/
}

Answer 4

使用<代码>java.util.Observable和java.util. 观察员使表格得以更新?

友情链接