Tuesday, December 23, 2014

Check status of antialiasing

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 = g2d.getRenderingHints();

      boolean bl = rh.containsValue

      (RenderingHints.Value_antialias_on);

      System.out.println(bl);

      g2.setRenderingHint(RenderingHints.

      key_antialiasing, Renderinghints.value_antialias_on);

Display a colors in a frame

import java.awt.Graphics;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.awt.image.BufferedImage;

import javax.swing.JComponent;

import javax.swing.JFrame;

public class Main extends JComponent

   BufferedImage image;

   public void initialize()

      int width = getSize().width;

      int height = getSize().height;

      int[] data = new int[width * height];

      int index = 0;

      for (int i = 0; i < height; i++)

         int red = (i * 255) / (height - 1);

         for (int j = 0; j < width; j++)

            int green = (j * 255) / (width - 1);

            int blue = 128;

            data[index++] = (red < < 16) | (green < < 8) | blue;

      image = new BufferedImage

      (width, height, BufferedImage.Type_int_rgb);

      image.setRGB(0, 0, width, height, data, 0, width);

   public void paint(Graphics g)

      if (image == null)

      initialize();

      g.drawImage(image, 0, 0, this);

   public static void main(String[] args)

      JFrame f = new JFrame("Display Colours");

      f.getContentPane().add(new Main());

      f.setSize(300, 300);

      f.setLocation(100, 100);

      f.addWindowListener(new WindowAdapter()

         public void windowClosing(WindowEvent e)

            System.exit(0);

});

      f.setVisible(true);