Figure 10-18 Rectangle and Cube classes Rectangle - length : double - width : double + Rectangle(len : double, w : double) + setLength(len : double) : void + setWidth(w : double) : void + getLength() : double + getWidth() : double + getArea() : double Cube - height : double + Cube(len : double, w : double, h: double) + getHeight() : double + getSurfaceArea() : double + getVolume() : double
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Recall the Rectangle and Cube classes discussed earlier, as shown in Figure 10-18.
a) Is the following statement legal or illegal? If it is illegal, why?
Rectangle r = new Cube(10, 12, 5);
b) If you determined that the statement in part a is legal, are the following statements
legal or illegal? (Indicate legal or illegal for each statement.)
System.out.println(r.getLength());
System.out.println(r.getWidth());
System.out.println(r.getHeight());
System.out.println(r.getSurfaceArea());
c) Is the following statement legal or illegal? If it is illegal, why?
Cube c = new Rectangle(10, 12);
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