How to reset a JTable

问题:

I have a question with respect to JScrollPane and a JTable.

I have added a JTable to a JScrollPane, and added the JScrollPane to the JPanel. When I click on 'show' button, the JTable will be filled with contents from the database.

I also have another button reset, clicking on which will remove the contents of the JTable, and the JScrollPane. It is supposed to be doing that, but what happens is that, even after clicking the button, all the contents of the JTable and the JScrollPane still exists.

I used revalidate(), reinstantiate(), etc, but of no use. How do I make it work?

回答1:

Assuming you are using a DefaultTableModel, then you just do:

model.setRowCount(0);

回答2:

In order to remove a row from a JTable, you need to remove the target row from the underlying TableModel. If, for instance, your TableModel is an instance of DefaultTableModel, you can remove a row by doing the following:

((DefaultTableModel)myJTable.getModel()).removeRow(rowToRemove);

Updation 2

To know the rows and delete from jtable

 int rows = myJTable.getRowCount();
 for(int i=0;i<rows;i++)
 ((DefaultTableModel)myJTable.getModel()).removeRow(i);