Question

我正在尝试将从表单读入的数据添加到jTable中。到目前为止，这就是我所拥有的，我不知道为什么它不起作用。这是代码：

    public void fillTable(){
        String inputField1 = jTextArea1.getText();
        String inputField2 = jTextField8.getText();
        String inputField3 = jComboBox1.getSelectedItem().toString();
        String inputField4 = jTextField11.getText(); 
        DefaultTableModel model = (DefaultTableModel) jTable2.getModel();
        int numRows = jTable2.getRowCount();
        for (int i = 0; i <= numRows; i++){
            model.setValueAt(inputField1, numRows, 1);
            model.setValueAt(inputField2, numRows, 2);
            model.setValueAt(inputField3, numRows, 4);
            model.setValueAt(inputField4, numRows, 6);      
        }
        jTable2.setModel(model);     
    }

我得到的错误是：

Exception in thread "AWT-EventQueue=0" java.lang.ClassCastException:  my.rcs.accounting.DraftInvoice$5 cannot be cast to groovy.model.DefaultTableModel

我做错了什么，如何解决这个问题？

谢谢！

Answer 1

应该是i而不是numRows。

for (int i = 0; i <= numRows; i++) {
      model.setValueAt(inputField1, i, 1);
      model.setValueAt(inputField2, i, 2);
      model.setValueAt(inputField3, i, 4);
      model.setValueAt(inputField4, i, 6);      
}

Answer 2

您能找到创建您的jTable2的代码吗？还有你用于DefaultTableModel的确切import（=包名）？

我怀疑ClassCastException可能来自这一行： DefaultTableModel model =（DefaultTableModel）jTable2.getModel（）;

引出两个问题：

1) what table model was initially associated with jTable2, it seems to be some inner class my.rcs.accounting.DraftInvoice$5 and the question is - does it inherit from DefaultTableModel

2) What DefaultTableModel are you expecting, naiively I'd expect it to be javax.swing.table.DefaultTableModel

使用Button Click将新行数据添加到jTable

2 个答案: