How to check whether antialiasing is enabled or not in Java

Problem Description

How to check whether antialiasing is enabled or not?

Solution

Following example demonstrates how to check if antialiasing is turned on or not using RenderingHints Class.

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) {
      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 g2 = (Graphics2D) g;
      RenderingHints rh = g2.getRenderingHints();
      boolean bl = rh.containsValue (RenderingHints.VALUE_ANTIALIAS_ON);
      System.out.println(bl);
      g2.setRenderingHint(
         RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
   }
}

Result

The above code sample will produce the following result.

False
False
False