import javax.swing.JTable;
public class Main {
public static void main(String[] argv) throws Exception {
Object[][] cellData = { { "1-1", "1-2" }, { "2-1", "2-2" } };
String[] columnNames = { "col1", "col2" };
JTable table = new JTable(cellData, columnNames);
int rows = table.getRowCount();
int cols = table.getColumnCount();
System.out.println(rows);
System.out.println(cols);
}
}