Viết chương trình mô tả đối tượng Rectangle

Rectangle.java

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package BT2;

/**
 *
 * @author HieuNguyen
 */
public class Rectangle {
    private int width;
    private int height;

    public Rectangle() {
    }

    public Rectangle(int width, int height) {
        this.width = width;
        this.height = height;
    }
    
    public int getWidth() {
        return width;
    }

    public void setWidth(int width) {
        this.width = width;
    }

    public int getHeight() {
        return height;
    }

    public void setHeight(int height) {
        this.height = height;
    }
    
    public int getArea(){
        return width*height;
    }
    
    public  int getPerimeter(){
        return (width + height)*2;
    }
    public void display(){
        for (int i = 0; i < width; i++) {
            for (int j = 0; j < height; j++) {
                System.out.print("#");
            }
            System.out.println("");
        }
    }
    public static void main(String[] args) {
        Rectangle r = new Rectangle(3,7);
        r.display();
        r.setWidth(5);
        r.setHeight(6);
        System.out.println("Perimeter : "+r.getPerimeter()+"\nArea: "+r.getArea());
    }
}