A Slice-Based Change Impact Analysis for Regression Test Case Prioritization of Object-Oriented Programs

Algorithm 1

An example Java program.

(1)  package pkg;

(2)  importjava.util.;

(3)  public class TestShape

(4)   public static void main(String args)

(5)    String str;

(6)    int a, b;

(7)    Scanner sin = new Scanner(System.in);

(8)    System.out.println("Enter the Color: ");

(9)    str = sin.next();

(10)   System.out.println("Enter the length and breadth: ");

(11)   a = sin.nextInt();

(12)   b = sin.nextInt();

(13)   Shape s1 = new Rectangle(str, a, b);

(14)   System.out.println(s1);

(15)   System.out.println("Area is " + s1.getArea());

(16)   System.out.println("Enter the Color: ");

(17)   str = sin.next();

(18)   System.out.println("Enter the length and breadth: ");

(19)   a = sin.nextInt();

(20)   b = sin.nextInt();

(21)   Shape s2 = new Triangle(str, a, b);

(22)   System.out.println(s2);

(23)   System.out.println("Area is " + s2.getArea());

   package pkg;

(24) public class Triangle <T> extends Shape

(25) private T base;

(26) private T height;

(27) public Triangle(String color, T base, T height)

(28)  super(color);

(29)  this.base = base;

(30)  this.height = height; 

(31) public String toString()

(32) return "Triangle of base=" + base + " and height=" + height + ", subclass of " + super.toString(); 

(33) public T getArea()

(34) return 0.5baseheight; 

   package pkg;

(35) public class Rectangle extends Shape

(36) private int length;

(37) private int width;

(38) public Rectangle(String color, int length, int width)

(39)  super(color);

(40)  this.length = length;

(41)  this.width = width; 

(42) public String toString()

(43)  return "Rectangle of length=" + length + " and width=" + width + ", subclass of " + super.toString(); 

(44) public double getArea()

(45)  return lengthwidth; 

    package pkg;

(46) public class Shape

(47) private String color;

(48) public Shape (String color)

(49)  this.color = color; 

(50) public String toString()

(51)  return "Shape of color="" + color + """; 

(52) public double getArea()

(53)  System.err.println("Shape unknown! Cannot compute area!");

(54)  return 0;