Java tutorial
import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.RenderingHints; import javax.swing.JComponent; import javax.swing.JFrame; public class Main { public static void main(String[] args) { new Main(); } Main() { JFrame frame = new JFrame(); frame.add(new MyComponent()); frame.setSize(300, 300); frame.setVisible(true); } } class MyComponent extends JComponent { public void paint(Graphics g) { Graphics2D g2d = (Graphics2D) g; RenderingHints rhints = g2d.getRenderingHints(); boolean antialiasOn = rhints.containsValue(RenderingHints.VALUE_ANTIALIAS_ON); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); } }