Java tutorial
import java.awt.Dimension; import javax.swing.JTable; public class Main { public static void main(String[] argv) throws Exception { JTable table = new JTable(); Dimension d = table.getIntercellSpacing(); // d.width == 1, d.height == 1 //Add 5 spaces to the left and right sides of a cell int gapWidth = 10; int gapHeight = 4; table.setIntercellSpacing(new Dimension(gapWidth, gapHeight)); } }