Java-N-Body-Simulation/Test.java

import java.awt.*;
import java.awt.image.*;
import javax.swing.*;

public class Test {
    public static void main(String[] args){

        for(int i = 0; i < 30; i ++){
            display(resize(getRandomFrame(),500,500));
        }

        
    }

    private static JFrame frame;
    private static JLabel label;
    public static void display(BufferedImage image){
        if(frame==null){
            frame=new JFrame();
            frame.setTitle("stained_image");
            frame.setSize(image.getWidth(), image.getHeight());
            frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
            label=new JLabel();
            label.setIcon(new ImageIcon(image));
            frame.getContentPane().add(label,BorderLayout.CENTER);
            frame.setLocationRelativeTo(null);
            frame.pack();
            frame.setVisible(true);
        }else label.setIcon(new ImageIcon(image));
        }

    public static BufferedImage getRandomFrame(){
        BufferedImage img = new BufferedImage(50, 50, BufferedImage.TYPE_INT_ARGB);

        for(int y = 0; y < 50; y ++){
            for(int x = 0; x < 50; x ++){
                int a = 255;
                int r = (int) (Math.random() * 256);
                int g = (int) (Math.random() * 256);
                int b = (int) (Math.random() * 256);

                int p = (a<<24) | (r<<16) | (g<<8) | b;

                img.setRGB(x, y, p);
            }
        }
        return img;
    }
    public static BufferedImage resize(BufferedImage img, int newW, int newH) { 
        Image tmp = img.getScaledInstance(newW, newH, Image.SCALE_SMOOTH);
        BufferedImage dimg = new BufferedImage(newW, newH, BufferedImage.TYPE_INT_ARGB);
    
        Graphics2D g2d = dimg.createGraphics();
        g2d.drawImage(tmp, 0, 0, null);
        g2d.dispose();
    
        return dimg;
    }
}