BasicStroke() constructor from BasicStroke has the following syntax.
public BasicStroke()
In the following code shows how to use BasicStroke.BasicStroke() constructor.
//ww w . ja v a2 s. com import java.awt.BasicStroke; import java.awt.Color; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.geom.Ellipse2D; import javax.swing.JFrame; import javax.swing.JPanel; public class Main extends JPanel { public void paint(Graphics g) { Graphics2D g2 = (Graphics2D) g; g2.setPaint(Color.black); g2.setStroke(new BasicStroke()); g2.draw(new Ellipse2D.Double(20,20, 50, 50)); } public static void main(String[] args) { JFrame frame = new JFrame(); frame.add(new Main()); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setBounds(20,20, 500,500); frame.setVisible(true); } }