import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;

public class CellGap{
	JTable table;
	public static void main(String[] args) {
		new CellGap();
	}

	public CellGap(){
		JFrame frame = new JFrame("Setting the margin in JTable Component!");
		JPanel panel = new JPanel();
		String data[][] = {{"Vinod","Computer","3"},{"Rahul","History","2"},{"Manoj","Biology","4"},{"Sanjay","PSD","5"}};
		String col [] = {"Name","Course","Year"};
		DefaultTableModel model = new DefaultTableModel(data,col);
		table = new JTable(model);
		Dimension dim = new Dimension(20,1);
		table.setIntercellSpacing(new Dimension(dim));
		SetRowHight(table);
		table.setColumnSelectionAllowed(true);
		JTableHeader header = table.getTableHeader();
		header.setBackground(Color.yellow);
		JScrollPane pane = new JScrollPane(table);
		panel.add(pane);
		frame.add(panel);
		frame.setSize(500,150);
		frame.setUndecorated(true);
		frame.getRootPane().setWindowDecorationStyle(JRootPane.PLAIN_DIALOG);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);
	}
	public void SetRowHight(JTable table){
		int height = table.getRowHeight();
		table.setRowHeight(height+10);
	}
}