How to clear contents of a jTable ?

Question

I have a jTable and it\'s got a table model defined like this:

javax.swing.table.TableModel dataModel = 
     new javax.swing.table.DefaultTableModel(data, c         


        

Answer 1

You have a couple of options:

1. Create a new DefaultTableModel(), but remember to re-attach any listeners.
2. Iterate over the model.removeRow(index) to remove.
3. Define your own model that wraps a List/Set and expose the clear method.

Answer 2

public void deleteAllRows() {
    DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
    model.setRowCount(0);
}

Answer 3

Another easy answer:

defaultTableModel.getDataVector().removeAllElements();

Answer 4

I think you meant that you want to clear all the cells in the jTable and make it just like a new blank jTable. For an example, if your table contains 40 raws, you can do following.

DefaultTableModel model = (DefaultTableModel)this.jTable.getModel();
model.setRowCount(0);
model.setRowCount(40);

Answer 5

One of the trivial methods is to use the following option.

dataModel.setRowCount(0);

dataModel is the model which you would like clear the content on

However, it is not optiomal solution.

Answer 6

Easiest way:

//private TableModel dataModel;
private DefaultTableModel dataModel;


void setModel() {
  Vector data = makeData();
  Vector columns = makeColumns();
  dataModel = new DefaultTableModel(data, columns);
  table.setModel(dataModel);
}

void reset() {
  dataModel.setRowCount(0);
}

i.e. your reset method tell the model to have 0 rows of data The model will fire the appropriate data change events to the table which will rebuild itself.