Java/2D Graphics GUI/AntiAliasing

Determine if antialiasing is enabled

 
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 g2d = (Graphics2D) g;
    RenderingHints rhints = g2d.getRenderingHints();
    boolean antialiasOn = rhints.containsValue(RenderingHints.VALUE_ANTIALIAS_ON);
    System.out.println(antialiasOn);
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
  }
}

Disable antialiasing for shapes

  
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 g2d = (Graphics2D) g;
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
  }
}

Disable antialiasing for text

  
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 g2d = (Graphics2D) g;
    g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);
  }
}

Enable antialiasing for shapes

  
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 g2d = (Graphics2D) g;
    RenderingHints rhints = g2d.getRenderingHints();
    boolean antialiasOn = rhints.containsValue(RenderingHints.VALUE_ANTIALIAS_ON);
    System.out.println(antialiasOn);
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
  }
}

Enable antialiasing for text

  
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 g2d = (Graphics2D) g;
    g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
        RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
  }
}