Intuitively, every square is a rectangle, so it is tempting to use inheritance for implementing a square:

public class Square extends Rectangle 

However, the devil is in the details. The Square class inherits all mutators of Rectangle, and some of them can mutate a square into a non-square shape.

The safer approach is to use aggregation:

public class Square
   . . .
   private Rectangle rect;

Now we do not inherit any Rectangle methods. Instead, all methods must be implemented so that they operate on the rect instance field. Your task is to implement the constructor and three methods.

Complete the following file:

import java.awt.Rectangle; public class Square { /** Constructs a square with a given position and side length. @param x the x-coordinate of the top left corner @param y the y-coordinate of the top left corner @parameter sideLength the length of each side */ public Square(int x, int y, int sideLength) { // TODO } /** Translates this square the indicated distance, to the right along the x coordinate axis, and downward along the y coordinate axis. @param dx the distance to move along the x axis @param dy the distance to move along the y axis */ public void translate(int dx, int dy) { // TODO } /** Sets the new side length of this square. @param newSideLength the new side length */ public void setSideLength(int newSideLength) { // TODO } public String toString() { // TODO } private Rectangle rect; // The following method checks your work. public static Square check(int x, int y, int sideLength, int dx, int dy, int newSideLength) { Square sq = new Square(x, y, sideLength); sq.translate(dx, dy); sq.setSideLength(newSideLength); return sq; } }