Added Array Visualization

Author: AhmedEl-Gohary

src/DrawRect.java

@@ -0,0 +1,31 @@
+import java.awt.*;
+import javax.swing.*;
+import java.util.ArrayList;
+import java.util.Random;
+
+public class DrawRect extends JPanel {
+	
+	public static final int HEIGHT = 900;
+	public static final int WIDTH = 30;
+	public static final Color RECT_COLOR = new Color(135, 206, 235);
+	
+	ArrayList<Integer> arr;
+	
+	public DrawRect(ArrayList<Integer> heights) {
+		// Deep Cloning
+		arr = new ArrayList<>();
+		for (int i = 0; i < heights.size(); i++)
+			arr.add(heights.get(i));
+	}
+	
+	@Override
+	public void paintComponent(Graphics g) {
+		Graphics2D graphics = (Graphics2D) g;
+		super.paintComponent(graphics);
+		for (int i = 0, x = 5; x <= 1600; x += WIDTH + 5, i++) {
+			int y = arr.get(i);
+			graphics.setColor(RECT_COLOR);
+			graphics.fillRect(x, y, WIDTH, HEIGHT);
+		}
+	}
+}