Creating and filling JTables dynamically

Question

Hello,
How can I create and display a JTable dynamically in a Java application? In my application, I retrieve rows from a database and therefore I don't know in advance how many rows I need for my JTable (using the tablemodel). I tried to solve the problem in the following way:
1)start op applicatie with a JTable with 0 rows (screen is grey, only columns are visible)
2)run query and count number of rows.
3)create new JTable based on number retrieved in step 2 and tried to put it onto the screen.
4)run query again and fill table with values retrieved from query
The bottleneck so far is step 3. I can create a new table but I don't manage to put it onto the screen (i tried already the repaint() method)
Thanx for you help
Frits

Answer 1

Sure, no problem. Assume you've retrieved the following result from the database:First Name     Last Name     Age
John           Doe           25
Jane           Doe           27
Joe            Smith         40
Mary           Smith         19You create your JTable as like this:Vector headings = new Vector();
Vector rows = new Vector();
Vector cells = null;
JTable table = null;
for(int x=0; x< resultSize; x++){//resultSize is the size of your result
  cells = new Vector(); //Cells together will represent a row
  cells.add(yourResult.getTheFirstColumnForRowX()); //Pseudo-code
  cells.add(yourResult.getTheSecondColumnForRowX()); //Pseudo-code
  cells.add(yourResult.getTheThirdColumnForRowX()); //Pseudo-code
  //Now place those cells into the rows vector
  rows.add(cells);
//Create the JTable
table = new JTable(rows, headings);This code is not tested and is meant to give you an idea of how the concept can be applied. Hope it helps.