!747
!actionListener {
!awt {
!pcall

m {
  static JTable tbl;
  static new L data;
  
  p {
    data = (L) unstructure(loadSnippet("#1001610"), true);
    
    JFrame frame = new JFrame("A Table");
    frame.setBounds(10, 10, 400, 400);

    tbl = new JTable();
    updateTable();
    
    frame.getContentPane().add(new JScrollPane(tbl));
    frame.setVisible(true);
  }
  
  static void updateTable() {
    new L<L<S>> rows;
    new L<S> cols;

    if (data != null)    
      for (O x : data) pcall {
        if (x instanceof DynamicObject) {
          DynamicObject dO = cast x;
          new L<S> row;
          for (S field : dO.fieldValues.keySet()) {
            O value = dO.fieldValues.get(field);
            int col = cols.indexOf(field);
            if (col < 0) {
              cols.add(field);
              col = cols.size()-1;
            }
            dynSet(row, col, value instanceof S ? (S) value : structure(value));
          }
          rows.add(row);
        } else
          rows.add(litlist("?"));
      }

    fillTableWithStrings(tbl, rows, cols);
  }
  
  static void dynSet(L<S> l, int i, S s) {
    while (i >= l.size()) l.add("");
    l.set(i, s);
  }
}

Began life as a copy of #1001437

Seems to work.