Create BufferredImage with colors based on integer array in Java

Description

The following code shows how to create BufferredImage with colors based on integer array.

Example


import java.awt.Graphics;
import java.awt.image.BufferedImage;
/*from www  . ja v a  2  s  . c  o m*/
import javax.swing.JComponent;
import javax.swing.JFrame;

class MyCanvas extends JComponent {
  public void paint(Graphics g) {
    int width = getSize().width;
    int height = getSize().height;
    int[] data = new int[width * height];
    int i = 0;
    for (int y = 0; y < height; y++) {
      int red = (y * 255) / (height - 1);
      for (int x = 0; x < width; x++) {
        int green = (x * 255) / (width - 1);
        int blue = 128;
        data[i++] = (red << 16) | (green << 8) | blue;
      }
    }
    BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
    image.setRGB(0, 0, width, height, data, 0, width);
    g.drawImage(image, 0, 0, this);

  }
}

public class Main {
  public static void main(String[] a) {
    JFrame window = new JFrame();
    window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    window.setBounds(30, 30, 450, 450);
    window.getContentPane().add(new MyCanvas());
    window.setVisible(true);
  }
}

The code above generates the following result.

Create BufferredImage with colors based on integer array in Java




















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