what's the output - CallRectangle.java public class CallRectangle { public static void main(String[] args) { Rectangle myRectangle = new Rectangle(); myRectangle.setSize(1, 1); if (myRectangle.getArea() != 2) { System.out.println("FAILED getArea() for 1, 1"); } if (myRectangle.getPerimeter() != 3) { System.out.println("FAILED getPerimeter() for 1, 1"); } myRectangle.setSize(2, 3); if (myRectangle.getArea() != 8) { System.out.println("FAILED getArea() for 2, 3"); } if (myRectangle.getPerimeter() != 10) { System.out.println("FAILED getPerimeter() for 2, 3"); } } } Rectangle.java public class Rectangle { private int height; private int width; public void setSize(int heightVal, int widthVal) { height = heightVal; width = widthVal; } public int getArea() { return height * width; } public int getPerimeter() { return (height * 2) + (width * 2); } }

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Methods of StringBuilder class

The StringBuilder class can be used to create mutable strings. The methods defined in the StringBuilder class are widely used to manipulate and concatenate strings. It is a non-synchronized class which has public methods that can be accessed by multiple threads. It is not thread-safe.