Vector class lab assignment

Resources

• MathIsFun - Vectors
• Converting from Polar to Cartesian

Vector class

• Create a Vector class using the following specifications (HINT: Use any of your notes or other classes as resources):

BE SURE TO COMMENT YOUR CODE

Attributes (private):

• double magnitude (default: 0)
• double direction (default: 0) - in radians

Methods (public)

• Vector() - default constructor
• Vector(double r, double theta) - specific constructor
• void setMagnitude(double newMag) - sets the magnitude
• void setDirection(double newDir) - sets the direction (in radians)
• double getMagnitude() - returns the magnitude
• double getDirection() - returns the direction (in radians)
• double getDirectionDegrees() - returns the direction (in degrees)
• double getX()
  • returns the Cartesian x-coordinate of the Vector (look at Resources to convert Polar->Cartesian)
• double getY()
  • returns the Cartesian y-coordinate of the Vector (look at Resources to convert Polar->Cartesian)
• String toString() - returns a String representation of the Vector in the format (magnitude, direction)
  • Example: (2, 6.283)
• Vector add(Vector v)
  • returns a new Vector after calculating the Vector addition of itself and Vector v
  • Note: if you need to use arc tangent, then use the Math.atan2() method
• Vector sub(Vector v)
  • returns a new Vector after calculating the Vector subtraction of itself and Vector v
  • Note: if you need to use arc tangent, then use the Math.atan2() method

Testing Vector class

• Write your own main method to test out all the methods in the Vector class

//Example (incomplete -- add more testing)
Vector v = new Vector();
Vector v2 = new Vector(4, Math.PI/2);

v.setMagnitude(3);

System.out.println(v);
System.out.println(v2);

System.out.println("Vector add: v + v2");
Vector v3 = v.add(v2);
System.out.println(v3);  // magnitude=5, direction=0.927 radians

System.out.println("Vector sub: v - v2");
Vector v4 = v.sub(v2);
System.out.println(v4);  // magnitude=5, direction=-0.927 or 5.356 radians