View difference between Paste ID: 2bPFcahz and 4tFnu0Va

 import javax.swing.JFrame;
 import javax.swing.JPanel;
 import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.image.BufferedImage;
 
 public class Graph extends JPanel {
     public static void main(String[] args) {
         JFrame frame = new JFrame();
         Graph graph = new Graph(800, 600);
         graph.setPreferredSize(new Dimension(800, 600));
         frame.add(graph);
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         frame.pack();
         frame.setVisible(true);
     }
 
-    private final BufferedImage image;
+
 
     public Graph(int width, int height) {
         setPreferredSize(new Dimension(width, height));
 
         Func easeInCubic = power(3);
-        image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
+
         Func easeInOutCubic = easeInCubic.inOut();
         Func easeInCirc = circ;
         Func easeOutCirc = easeInCirc.flipXY();
         Func easeInOutCirc = easeInCirc.inOut();
         Func easeOutSine = sine;
         Func easeInSine = easeOutSine.flipXY();
         Func easeInOutSine = easeInSine.inOut();
         func = easeInOutSine;
     }
 
     public static Func power(final double e) {
         return new Func() {
             public double apply(double x) {
                 return Math.pow(x, e);
             }
         };
     }
 
     public static Func circ = new Func() {
         public double apply(double x) {
             return 1-Math.sqrt(1-x*x);
         }
     };
 
     public static Func sine = new Func() {
         public double apply(double x) {
             return Math.sin(x*Math.PI/2);
         }
     };
 
     public void setFunc(Func func) {
         this.func = func;
     }
 
     @Override
     public void paint(Graphics _g) {
         Graphics2D g = (Graphics2D)_g;
         g.setColor(Color.WHITE);
         g.fillRect(0, 0, getWidth(), getHeight());
         g.setColor(Color.BLACK);
         int lastX = 0, lastY = 0;
         for(int ix = 0; ix < getWidth(); ix++) {
             double x = ((double)ix)/getWidth();
             double y = func.apply(x);
             int iy = getHeight() - (int)(y*getHeight());
             g.drawLine(lastX, lastY, ix, iy);
             lastX = ix; lastY = iy;
         }
     }
 }