Question

Instructions: Refer to the Timel class provided in Figure 8.1 in your Deitel book to complete the exercise. Make sure that you follow the Program Style and Readability guidelines found in the Start Here Folder. 1. Write a Point class. The Point class should be written as an abstract data type. 2. Include the following instance variables: a. an integer representing the x coordinate b. an integer representing the y coordinate c. The instance variables in your program should only be directly accessible inside of the Point class. 3. Have 2 constructors for the Point class. a. a no-arguments constructor, set both of the instance variables to 0 (zero). b. a constructor having two arguments, one for each of the two instance variables, set the instance variables to those argument values. 4. Include got and set methods for each of the two instance variables identified in step 2. 5. Include a toString method in your Point class. The toString method should be accessible to any program and should return the values of the two instance variables. Values must be labeled; e.g. "The X- coordinate-15". DO NOT print from within the toString method. 6. Write a client program (also known as a driver, tester). See the Timel Test program in Figure 8.2 of your Deitel book. Use this program as a model to write your program. Your program will have the same intent but will follow the procedure as outlined below. Name your program Point Test. 7. In the Point Test class, a. Print your name, Lab number, and date as the first three lines of output. Hard-code the date...do not use the system date. b. Create an object of type Point using the no-arguments constructor. Call this point1 c. Create a second object of type Point using the two-argument constructor. Call this point2. Use the values of x = 11, y = 24 d. Display point I instance variables after a call to pointl.toString() e. Display point 2 instance variables after a call to point2.toStringo f. Change the x value of pointl to 35 using the set method for the x value of point!

Answer 1

Here I am providing the answer for the above question:

Code:

Point.java

public class Point
{
   private int x,y;
   //constructors
   public Point()
   {
       this.x=0;
       this.y=0;
   }
   public Point(int x,int y)
   {
       this.x=x;
       this.y=y;
   }
   //getters and setters
   public int getX() {
       return x;
   }
   public void setX(int x) {
       this.x = x;
   }
   public int getY() {
       return y;
   }
   public void setY(int y)
   {
       this.y = y;
   }
   //tostring method
   @Override
   public String toString()
   {
       return "The X coordinate = "+ x + "\nThe Y coordinate = " + y + "\n";
   }
}

//please replace name,lab number,date with you name, lab number , date

PointTest.java

public class PointTest
{
   public static void main(String args[])
   {
       //printing name,lab number,date
       System.out.println("Name : "+"Suji");
       System.out.println("Lab Number : "+10);
       System.out.println("Date : "+"21-01-2020");
      
       Point point1=new Point(); //creating point1 with no arguments
       Point point2=new Point(11,24); //creating point2 with arguments
      
       System.out.println(point1.toString()); //calling to string methods for two objects
       System.out.println(point2.toString());
      
       point1.setX(35); //changing the x value of point1 using setX() method.
   }

}

Screenshot:

package files; public class Point private int x,y; //constructors public Point () this.x=0; this.y=0; public Point (int x, int y) this.x=x;| this.y=y; //getters and setters public int getX() { return x; public void setx (int x) { this.x = x; public int getY() { return y; public void setY(int y) this.y = y; //tostring method @Override public String toString() return "The X coordinate = "+ x + "\nThe Y coordinate = " + y + "\n";

public class Point Test public static void main(String args[]) //printing name, lab number, date System.out.println("Name : "+"Suji"); System.out.println("Lab Number : "+10); System.out.println("Date : "+"21-01-2020"); Point pointl=new Point(); //creating pointl with no arguments Point point2=new Point (11,24); //creating point2 with arguments System.out.println (pointl.toString()); // calling to string methods for two ol System.out.println (point2.toString()); pointl.setx (35); // changing the x value of pointl using setX() method.

Output:

Name : Suji Lab Number : 10 Date : 21-01-2020 The X coordinate = 0 The Y coordinate = 0 The X coordinate = 11 The Y coordinate = 24

Hoping that the above answers will help you...Thank you...