更新JTable [英] Updating a JTable

问题描述

我已经多次问过我的问题，但从未见过我期望的答案. 我已经在JTable中输入了数据库的元素，并且希望能够通过某些JButton删除/添加元素. 问题是，当我添加/删除时，修改在数据库中可见，但在JTable中不可见.当我停止程序并再次运行它时，将更新JTable. 修改一行后，我该怎么办立即更新表?我试图做this.table.repaint()，但是没有用.我想我必须对tablemodel做一些事情，可能要对fireTableStructureChanged();做些事情，但是我不太了解如何使用它 非常感谢您的宝贵时间.

I've seen my question asked several times but I never saw the answer I expected. I've entered elements of a database in a JTable and I want to be able to delete/add elements via some JButtons. The problem is that when I add/delete, the modification is visible in the database but not in the JTable. When I stop the programm and run it again, the JTable is updated. What could I do to update the table immediatly after the modification of a row? I've tried to do this.table.repaint() but it didn't work. I think I'll have to do something with the tablemodel, probably with fireTableStructureChanged(); but I don't undersand well how to use it Thank you very much for your time.

这是我在JTable的控制器类中的代码的一部分，我认为这没有帮助.

Here's part of my code in the controller class of the JTable, I don't think it will help..

public void update(Observable o, Object message) {
    Integer iMessage = (Integer) message;

    if (iMessage == Cours.CHANGEMENT_ELEVES) {
        int sizeEl = this.modele.getAllEleves().size();

        if (this.modele.getAllEleves() !=null) {
            Vector<String[]> data = this.modele.getAllEleves();

            for (int i=0; i<sizeEl; i++) {
                this.table.setValueAt(data.get(i)[0],i, 0);
                this.table.setValueAt(data.get(i)[1],i,1);
                this.table.setValueAt(data.get(i)[2],i,2);
        }
        this.table.repaint();
    }
    }
}

推荐答案

这不是Jtable重新绘制或重新验证的问题. 当您从表模型中添加行或删除行时，您必须触发事件fireTableRowInserted偶数或tableDatachangeEvent. 以下代码是示例:

Its not a problem of Jtable repaint or revalidate. When u add row or delete row from table model, u must fire event fireTableRowInserted even or tableDatachangeEvent. Following code is example:

class myModel extends AbstractTableModel
{
////
////
////
////
////
       // Remove Row from table Model
        public void removeRow(int row) {
            data.removeElementAt(row);
            fireTableRowsDeleted(getRowCount(), getRowCount());
        }

        // Add new row to table
        public void addRow(Vector row) {
            data.addElement(row);
            fireTableRowsInserted(0, getRowCount());
        }
}

这篇关于更新JTable的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！