How to create a JTable without directly assigning values

Question

I'm unsure about how to assign values to a JTable without directly assigning values to the initial 2D Array, i.e. String data[][]= new String[5][5]{"abc","def","ghi","jkl","mno"};

If I declared my array of 2D String, followed by defaultTableModel, is there any way I can assign the values of abc, def, ghi, jkl, mno to the Array/JTable without doing it as above in a separate method maybe?

Update

JPanel invoiceViewPanel= new JPanel(null);

String data[][]= new String[4][10];  
String columnHeaders[]={"Invoice ID","Invoice Name","Customer", "Complete?"};  

DefaultTableModel model = new DefaultTableModel(data, columnHeaders) {

boolean[] Editable= new boolean[]{
                false, false, false, true
        };

        public boolean isCellEditable(int rowIndex, int columnIndex) {
            return editableCells[columnIndex];
        }

@Override
public Class<?> getColumnClass(int columnIndex)
{
    return columnClass[columnIndex];
}
};

JTable table=new JTable(model);  

JScrollPane tableContainer=new JScrollPane(table);      

final Class[] columnClass = new Class[] 
{
Integer.class, String.class, String.class, Boolean.class
};

 public void launch()
 {
this.setLayout(new FlowLayout());
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    


this.add(invoiceViewPanel);
invoiceViewPanel.add(tableContainer);
this.add(tableContainer);

this.setTitle("Invoices");
this.setSize(500,600);
this.setVisible(true);
this.setResizable(false);

 }

This is a basic version of my code. It is just the initialising of my JTable.

I have a text file of the format

001/ TV Purchase/ John Smith/ true

002/ Refrigerator Purchase/ Jean Smith/ false

Answer 1

All Swing components work with a Model. To update the component you update the model.

So in the case of a JTable you can create an "empty" model for your table by using:

String[] columnNames = { "Column1", "Column2", ... };
DefaultTableModel model = new DefaultTableModel(columnNames, 0);
JTable table = new JTable( model );

Now when you want to add data to the model you can use:

Object[] row = {"data1", data2", ... };
model.addRow( row );

Read the DefaultTableModel API for more methods to change the data. You can also add a Vector of data to the model.