Untitled

    import java.util.*;
import java.awt.Rectangle;
public class Homework13A
{
   public static void main(String[] args)
   {
      ArrayList<Rectangle> test = new ArrayList<Rectangle>();
      test.add(new Rectangle(10, 20, 30, 40));
      test.add(new Rectangle(20, 10, 30, 40));
      test.add(new Rectangle(10, 20, 40, 50));
      test.add(new Rectangle(20, 10, 50, 30));
      Rectangle enc = enclosing(test);
      System.out.println(enc);
      System.out.println("Expected: Rectangle[x=10,y=10,width=61,height=61]");
   }

   /**
      Computes the smallest rectangle enclosing all rectangles in
      an array list.
      @param rects an array list of rectangles of size >= 1
      @return the smallest rectangle enclosing all rectangles in rect
   */
   public static Rectangle enclosing(ArrayList<Rectangle> rects)
   {
    double leftX = Integer.MAX_VALUE;
    double leftY = Integer.MAX_VALUE;
    double rightX = Integer.MIN_VALUE;
    double rightY = Integer.MIN_VALUE;

        for (Rectangle r : rects) {
        if (r.getX() < leftX)
            leftX = r.getX();
        if (r.getY() < leftY)
            leftY = r.getY();

        if ((r.getX() + r.getWidth()) > rightX)
            rightX = (r.getX() + r.getWidth());

        if ((r.getY() + r.getHeight()) > rightY)
            rightY = (r.getY() + r.getHeight());
    }
    Rectangle enc = new Rectangle((int) leftX, (int) leftY, (int) (rightX - leftX), (int) (rightY - leftY));

    return enc;
   }
}