Java Tutorial/2D Graphics/RenderHints

Handle screen updates

import java.awt.Graphics;
import javax.swing.JComponent;
import javax.swing.JFrame;
class MyCanvas extends JComponent {
  public void paint(Graphics g) {
    g.drawString (Long.toString(System.currentTimeMillis()), 10, 30); 
    repaint(1000);
  }
}
public class SettingFont {
  public static void main(String[] a) {
    JFrame window = new JFrame();
    window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    window.setBounds(30, 30, 300, 300);
    window.getContentPane().add(new MyCanvas());
    window.setVisible(true);
  }
}

RenderingHints.KEY_TEXT_ANTIALIASING

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.Border;
import javax.swing.border.TitledBorder;
public class TextQualityDemoVALUE_TEXT_ANTIALIAS_GASP {
  public static void main(String[] args) {
    JFrame frame = new JFrame("LCD Text Demo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setPreferredSize(new Dimension(630, 460));
    frame.setContentPane(new MyPanel(RenderingHints.VALUE_TEXT_ANTIALIAS_GASP));
    frame.pack();
    frame.setVisible(true);
  }
}
class MyPanel extends JPanel {
  private Object hintValue;
  public MyPanel(Object hintValue) {
    this.hintValue = hintValue;
    this.setPreferredSize(new Dimension(300, 100));
    String title = hintValue.toString();
    Border border = new TitledBorder(title);
    this.setBorder(border);
  }
  public void paintComponent(Graphics g) {
    Dimension d = this.getSize();
    BufferedImage backBuffer = (BufferedImage) this.createImage(d.width, d.height);
    Graphics2D g2 = backBuffer.createGraphics();
    g2.setColor(Color.WHITE);
    g2.fillRect(0, 0, d.width, d.height);
    g2.setColor(Color.BLACK);
    g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, hintValue);
    g2.drawRect(0, 0, d.width - 1, d.height - 1);
    g2.drawString("abcdefghijklmnopqrstuvwxyz", 20, 40);
    g2.drawString("ABCDEFGHIJKLMNOPQRSTUVWXYZ", 20, 60);
    g2.drawString("1234567890-=!@#$%^&*()_+,./<>?", 20, 80);
    g.drawImage(backBuffer, 0, 0, this);
  }
}

RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HBGR

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.Border;
import javax.swing.border.TitledBorder;
public class TextQualityDemoVALUE_TEXT_ANTIALIAS_LCD_HBGR {
  public static void main(String[] args) {
    JFrame frame = new JFrame("LCD Text Demo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setPreferredSize(new Dimension(630, 460));
    frame.setContentPane(new MyPanel(RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HBGR));
    frame.pack();
    frame.setVisible(true);
  }
}
class MyPanel extends JPanel {
  private Object hintValue;
  public MyPanel(Object hintValue) {
    this.hintValue = hintValue;
    this.setPreferredSize(new Dimension(300, 100));
    String title = hintValue.toString();
    Border border = new TitledBorder(title);
    this.setBorder(border);
  }
  public void paintComponent(Graphics g) {
    Dimension d = this.getSize();
    BufferedImage backBuffer = (BufferedImage) this.createImage(d.width, d.height);
    Graphics2D g2 = backBuffer.createGraphics();
    g2.setColor(Color.WHITE);
    g2.fillRect(0, 0, d.width, d.height);
    g2.setColor(Color.BLACK);
    g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, hintValue);
    g2.drawRect(0, 0, d.width - 1, d.height - 1);
    g2.drawString("abcdefghijklmnopqrstuvwxyz", 20, 40);
    g2.drawString("ABCDEFGHIJKLMNOPQRSTUVWXYZ", 20, 60);
    g2.drawString("1234567890-=!@#$%^&*()_+,./<>?", 20, 80);
    g.drawImage(backBuffer, 0, 0, this);
  }
}

RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.Border;
import javax.swing.border.TitledBorder;
public class TextQualityDemoVALUE_TEXT_ANTIALIAS_LCD_HRGB {
  public static void main(String[] args) {
    JFrame frame = new JFrame("LCD Text Demo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setPreferredSize(new Dimension(630, 460));
    frame.setContentPane(new MyPanel(RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB));
    frame.pack();
    frame.setVisible(true);
  }
}
class MyPanel extends JPanel {
  private Object hintValue;
  public MyPanel(Object hintValue) {
    this.hintValue = hintValue;
    this.setPreferredSize(new Dimension(300, 100));
    String title = hintValue.toString();
    Border border = new TitledBorder(title);
    this.setBorder(border);
  }
  public void paintComponent(Graphics g) {
    Dimension d = this.getSize();
    BufferedImage backBuffer = (BufferedImage) this.createImage(d.width, d.height);
    Graphics2D g2 = backBuffer.createGraphics();
    g2.setColor(Color.WHITE);
    g2.fillRect(0, 0, d.width, d.height);
    g2.setColor(Color.BLACK);
    g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, hintValue);
    g2.drawRect(0, 0, d.width - 1, d.height - 1);
    g2.drawString("abcdefghijklmnopqrstuvwxyz", 20, 40);
    g2.drawString("ABCDEFGHIJKLMNOPQRSTUVWXYZ", 20, 60);
    g2.drawString("1234567890-=!@#$%^&*()_+,./<>?", 20, 80);
    g.drawImage(backBuffer, 0, 0, this);
  }
}

RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_VBGR

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.Border;
import javax.swing.border.TitledBorder;
public class TextQualityDemoVALUE_TEXT_ANTIALIAS_LCD_VBGR {
  public static void main(String[] args) {
    JFrame frame = new JFrame("LCD Text Demo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setPreferredSize(new Dimension(630, 460));
    frame.setContentPane(new MyPanel(RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_VBGR));
    frame.pack();
    frame.setVisible(true);
  }
}
class MyPanel extends JPanel {
  private Object hintValue;
  public MyPanel(Object hintValue) {
    this.hintValue = hintValue;
    this.setPreferredSize(new Dimension(300, 100));
    String title = hintValue.toString();
    Border border = new TitledBorder(title);
    this.setBorder(border);
  }
  public void paintComponent(Graphics g) {
    Dimension d = this.getSize();
    BufferedImage backBuffer = (BufferedImage) this.createImage(d.width, d.height);
    Graphics2D g2 = backBuffer.createGraphics();
    g2.setColor(Color.WHITE);
    g2.fillRect(0, 0, d.width, d.height);
    g2.setColor(Color.BLACK);
    g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, hintValue);
    g2.drawRect(0, 0, d.width - 1, d.height - 1);
    g2.drawString("abcdefghijklmnopqrstuvwxyz", 20, 40);
    g2.drawString("ABCDEFGHIJKLMNOPQRSTUVWXYZ", 20, 60);
    g2.drawString("1234567890-=!@#$%^&*()_+,./<>?", 20, 80);
    g.drawImage(backBuffer, 0, 0, this);
  }
}

RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_VRGB

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.Border;
import javax.swing.border.TitledBorder;
public class TextQualityDemoVALUE_TEXT_ANTIALIAS_LCD_VRGB {
  public static void main(String[] args) {
    JFrame frame = new JFrame("LCD Text Demo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setPreferredSize(new Dimension(630, 460));
    frame.setContentPane(new MyPanel(RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_VRGB));
    frame.pack();
    frame.setVisible(true);
  }
}
class MyPanel extends JPanel {
  private Object hintValue;
  public MyPanel(Object hintValue) {
    this.hintValue = hintValue;
    this.setPreferredSize(new Dimension(300, 100));
    String title = hintValue.toString();
    Border border = new TitledBorder(title);
    this.setBorder(border);
  }
  public void paintComponent(Graphics g) {
    Dimension d = this.getSize();
    BufferedImage backBuffer = (BufferedImage) this.createImage(d.width, d.height);
    Graphics2D g2 = backBuffer.createGraphics();
    g2.setColor(Color.WHITE);
    g2.fillRect(0, 0, d.width, d.height);
    g2.setColor(Color.BLACK);
    g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, hintValue);
    g2.drawRect(0, 0, d.width - 1, d.height - 1);
    g2.drawString("abcdefghijklmnopqrstuvwxyz", 20, 40);
    g2.drawString("ABCDEFGHIJKLMNOPQRSTUVWXYZ", 20, 60);
    g2.drawString("1234567890-=!@#$%^&*()_+,./<>?", 20, 80);
    g.drawImage(backBuffer, 0, 0, this);
  }
}

RenderingHints.VALUE_TEXT_ANTIALIAS_ON

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.Border;
import javax.swing.border.TitledBorder;
public class TextQualityDemoVALUE_TEXT_ANTIALIAS_ON {
  public static void main(String[] args) {
    JFrame frame = new JFrame("LCD Text Demo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setPreferredSize(new Dimension(630, 460));
    frame.setContentPane(new MyPanel(RenderingHints.VALUE_TEXT_ANTIALIAS_ON));
    frame.pack();
    frame.setVisible(true);
  }
}
class MyPanel extends JPanel {
  private Object hintValue;
  public MyPanel(Object hintValue) {
    this.hintValue = hintValue;
    this.setPreferredSize(new Dimension(300, 100));
    String title = hintValue.toString();
    Border border = new TitledBorder(title);
    this.setBorder(border);
  }
  public void paintComponent(Graphics g) {
    Dimension d = this.getSize();
    BufferedImage backBuffer = (BufferedImage) this.createImage(d.width, d.height);
    Graphics2D g2 = backBuffer.createGraphics();
    g2.setColor(Color.WHITE);
    g2.fillRect(0, 0, d.width, d.height);
    g2.setColor(Color.BLACK);
    g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, hintValue);
    g2.drawRect(0, 0, d.width - 1, d.height - 1);
    g2.drawString("abcdefghijklmnopqrstuvwxyz", 20, 40);
    g2.drawString("ABCDEFGHIJKLMNOPQRSTUVWXYZ", 20, 60);
    g2.drawString("1234567890-=!@#$%^&*()_+,./<>?", 20, 80);
    g.drawImage(backBuffer, 0, 0, this);
  }
}

Set Rendering Hint and Ellipse

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.geom.Ellipse2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class EllipseRenderHints extends JFrame {
  public static void main(String[] args) {
    new EllipseRenderHints();
  }
  public EllipseRenderHints() {
    this.setSize(300, 300);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    this.add(new PaintSurface(), BorderLayout.CENTER);
    this.setVisible(true);
  }
}
class PaintSurface extends JComponent {
  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    Shape s = new Ellipse2D.Float(20, 50, 250, 150);
    g2.setPaint(Color.BLACK);
    g2.draw(s);
  }
}

The five new fields in java.awt.RenderingHints class:

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.Border;
import javax.swing.border.TitledBorder;
public class TextQualityDemo {
  public static void main(String[] args) {
    JFrame frame = new JFrame("LCD Text Demo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setPreferredSize(new Dimension(630, 460));
    frame.setContentPane(new MyPanel(RenderingHints.VALUE_TEXT_ANTIALIAS_OFF));
    frame.pack();
    frame.setVisible(true);
  }
}
class MyPanel extends JPanel {
  private Object hintValue;
  public MyPanel(Object hintValue) {
    this.hintValue = hintValue;
    this.setPreferredSize(new Dimension(300, 100));
    String title = hintValue.toString();
    Border border = new TitledBorder(title);
    this.setBorder(border);
  }
  public void paintComponent(Graphics g) {
    Dimension d = this.getSize();
    BufferedImage backBuffer = (BufferedImage) this.createImage(d.width, d.height);
    Graphics2D g2 = backBuffer.createGraphics();
    g2.setColor(Color.WHITE);
    g2.fillRect(0, 0, d.width, d.height);
    g2.setColor(Color.BLACK);
    g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, hintValue);
    g2.drawRect(0, 0, d.width - 1, d.height - 1);
    g2.drawString("abcdefghijklmnopqrstuvwxyz", 20, 40);
    g2.drawString("ABCDEFGHIJKLMNOPQRSTUVWXYZ", 20, 60);
    g2.drawString("1234567890-=!@#$%^&*()_+,./<>?", 20, 80);
    g.drawImage(backBuffer, 0, 0, this);
  }
}