3 replies to this topic

[@Cody]

Hi everyone, hopefully I'm posting this in the correct spot... I'm trying to use my clear button to clear data from the right side of my JTable, and can't figure it out. Here's what I have thus far...

    myTable.setModel(new javax.swing.table.DefaultTableModel(

         new Object [][] {

        {"Rent/Mortgage", null},

        {"Water", null},

        {"Electricity", null},

        {"Cable/Internet", null},

        {"Car", null},

        {"Groceries", null},

        {"Clothing", null},

        {"Gas", null},

        {null, null},

        {null, null}

    },

    new String [] {

        "Item", "Amount"

...

    private void clearButtonActionPerformed(java.awt.event.ActionEvent evt) {                                            

        calculateButton.setBackground(Color.lightGray);

        ...}

I'm trying to figure out how to put 0.00 in the cells currently marked as null. (This is a calculator, trying to set the amounts to zero upon clicking my clear button.) I've tried a plethora of for loops with none of them working like I'd like. I suppose I just don't understand JTable just yet. Thanks in advance for any help.

[gregwarner]

JTable.getModel().setValueAt(Object value, int row, int col)

That should give you what you need.

Here are the relevant doc pages:
JTable (Java Platform SE 6)
TableModel (Java Platform SE 6)

[@Cody]

    private void clearButtonActionPerformed(java.awt.event.ActionEvent evt) {                                            

        myTable.editCellAt(-1,-1); //stop editing

        calculateButton.setBackground(Color.lightGray);

        for(int row = 0; row < myTable.getRowCount(); row++)

        {

            for(int col = 0; col < myTable.getColumnCount(); col++)

            {

                myTable.setValueAt(0.00,row,1);

            }

        }

    }  

It's almost doing what I wanted it to now... I wanted to set everything on the right side to 0.00$ and NOT put 0.00$ in the cells that were originally blank... (The extra lines)...

[gregwarner]

You would have to use getValueAt() and test the value first to see if it's blank.