如何重绘JTable的数据

Question

我已经编写了以下方法来创建表但是每次调用任务列表时都会调用但是表不能更改表的值

 public void displayAllTaskByProjectId(Task[] task) {

    System.out.println("Success fully call");
    /**
     * The table to display tasks related to the selected project and timer
     * for that
     */
    tblTaskList = new JTable();
    LOG.info(" get here");
    int length;

    DefaultTableModel dm = new DefaultTableModel(0, 0) {
        private static final long serialVersionUID = 1L;

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

        public boolean isCellEditable(int row, int column) {
            switch (column) {
            case 5:
                return true;
            default:
                return false;
            }

        };
    };
    dm.fireTableDataChanged();
    String header[] = new String[] { "Prority", "Task Title", "Start",
            "Pause", "Stop", "Statulses" };
    dm.setColumnIdentifiers(header);

    // Add image icon in table
    ImageIcon imgStart = new ImageIcon("../../../../start.png");
    ImageIcon imgStop = new ImageIcon("../../../../stop.png");
    ImageIcon imgPause = new ImageIcon("../../../../pause.png");
    length = task.length;
    for (int count = 0; count < length; count++) {
        dm.addRow(new Object[] { count, task[count].getTaskTitle() + count,
                imgStart, imgPause, imgStop, "Active" });
    }
    tblTaskList.setModel(dm);
    TableColumn tbcStatus = tblTaskList.getColumnModel().getColumn(5);
    JComboBox cmbStatus = new JComboBox();
    cmbStatus.setModel(new DefaultComboBoxModel(new String[] { "Active",
            "Close", "Deactive", "Offline" }));
    tbcStatus.setCellEditor(new DefaultCellEditor(cmbStatus));

    tblTaskList.getColumnModel().getColumn(0).setMinWidth(0);
    tblTaskList.getColumnModel().getColumn(0).setMaxWidth(0);
    tblTaskList.getColumnModel().getColumn(1).setPreferredWidth(350);
    tblTaskList.getColumnModel().getColumn(2).setPreferredWidth(35);
    tblTaskList.getColumnModel().getColumn(3).setPreferredWidth(35);
    tblTaskList.getColumnModel().getColumn(4).setPreferredWidth(25);

    tblTaskList.getTableHeader().setReorderingAllowed(false);
    tblTaskList.getTableHeader().setResizingAllowed(false);
    tblTaskList.setBounds(93, 34, 614, 324);

    jspTasklist = new JScrollPane(tblTaskList);
    jspTasklist.setOpaque(false);
    jspTasklist.setFocusTraversalPolicyProvider(true);
    jspTasklist.setBounds(108, 34, 605, 335);
    frmTaskList.getContentPane().add(jspTasklist);
}

请尽快给我解决我的问题

Answer 1

请尽快给我解决我的问题

（尽快快速首发）

• 创建JTable和DefaultTableModel作为局部变量

• 在模型中添加，删除，修改数据 ，不要重新创建整个结构，在紧急情况下切换一个JTable的模型（在Swing GUI中已经可见）

• 任何Task[] task是它必须通知EDT ，然后代码model.add/remove/insertRow必须由涡卷通知EDT成invokeLater

Answer 2

你应该只删除tblTask​​List = new JTable（）; 从displayAllTask​​ByProjectId函数和代码将正常工作。仅在init组件时使用此行tblTask​​List = new JTable（）

Answer 3

数据未刷新的问题是您在为表设置模型之前调用fireTableDataChanged ，

对代码进行了如下更改：

public void displayAllTask​​ByProjectId（Task [] task）{

System.out.println("Success fully call");
/**
 * The table to display tasks related to the selected project and timer
 * for that
 */
tblTaskList = new JTable();
LOG.info(" get here");
int length;

DefaultTableModel dm = new DefaultTableModel(0, 0) {
    private static final long serialVersionUID = 1L;

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

    public boolean isCellEditable(int row, int column) {
        switch (column) {
        case 5:
            return true;
        default:
            return false;
        }

    };
};
tblTaskList.setModel(dm);

String header[] = new String[] { "Prority", "Task Title", "Start",
        "Pause", "Stop", "Statulses" };
dm.setColumnIdentifiers(header);

// Add image icon in table
ImageIcon imgStart = new ImageIcon("../../../../start.png");
ImageIcon imgStop = new ImageIcon("../../../../stop.png");
ImageIcon imgPause = new ImageIcon("../../../../pause.png");
length = task.length;
for (int count = 0; count < length; count++) {
    dm.addRow(new Object[] { count, task[count].getTaskTitle() + count,
            imgStart, imgPause, imgStop, "Active" });
}
dm.fireTableDataChanged();
TableColumn tbcStatus = tblTaskList.getColumnModel().getColumn(5);
JComboBox cmbStatus = new JComboBox();
cmbStatus.setModel(new DefaultComboBoxModel(new String[] { "Active",
        "Close", "Deactive", "Offline" }));
tbcStatus.setCellEditor(new DefaultCellEditor(cmbStatus));

tblTaskList.getColumnModel().getColumn(0).setMinWidth(0);
tblTaskList.getColumnModel().getColumn(0).setMaxWidth(0);
tblTaskList.getColumnModel().getColumn(1).setPreferredWidth(350);
tblTaskList.getColumnModel().getColumn(2).setPreferredWidth(35);
tblTaskList.getColumnModel().getColumn(3).setPreferredWidth(35);
tblTaskList.getColumnModel().getColumn(4).setPreferredWidth(25);

tblTaskList.getTableHeader().setReorderingAllowed(false);
tblTaskList.getTableHeader().setResizingAllowed(false);
tblTaskList.setBounds(93, 34, 614, 324);

jspTasklist = new JScrollPane(tblTaskList);
jspTasklist.setOpaque(false);
jspTasklist.setFocusTraversalPolicyProvider(true);
jspTasklist.setBounds(108, 34, 605, 335);
frmTaskList.getContentPane().add(jspTasklist);

}

请查看有关JTables的Swing Tutorial以获取更多信息。