Question

Write a complete Java program to create three types of counters as follows:

1. The first counter increases its value by one.
2. The second counter increases its value by two.
3. The third counter increases its value by three.

Please follow these notes:

1. Create one class for all counter types. The name of the class is Three_type_counter.
2. Define a constructor method that initial values for all counters to 7 when the class object created.
3. Create method for each counter as: count1, count2 and count3. Each method has to increase each counter value by one, two and three respectively.
4. In the main program:
   1. Create new object with name “obj_counter”.
   2. Call the three methods for each counter at one time.
   3. Print out the values for all counters.(support your answer by screenshot)

Answer 1

SOURCE CODE:

class Three_type_counter
{
    int count1=0;// counter varible for first counter
    int count2=0;;// counter varible for 2nd counter
    int count3=0;;// counter varible for 3rd counter
    Three_type_counter()
    {
        //constructor method that initial values for all counters to 7 when the class object created
        count1=7;
        count2=7;
        count3=7;
    }
    //method 1 counter
    void count1()
    {
        this.count1=this.count1+1;
    }
    //method 2 counter
    void count2()
    {
        this.count2=this.count2+2;
    }
    // method 3 counter
    void count3()
    {
        this.count3=this.count3+3;
    }
  
}
public class Main
{
   public static void main(String[] args) {
        // creating object for the Three_type_counter class
       Three_type_counter obj_counter=new Three_type_counter();
       // calling methods
       obj_counter.count1();
       obj_counter.count2();
       obj_counter.count3();
       // printing counter values
       System.out.println("counter1 :"+obj_counter.count1);
       System.out.println("counter2 :"+obj_counter.count2);
       System.out.println("counter3 :"+obj_counter.count3);
   }
}

CODE SCREENSHOT:

1 class Three_type_counter 2 { int count1=0;// counter varible for first counter int count2=0;;// counter varible for 2nd counter int count3=0; ;// counter varible for 3rd counter Three_type_counter() { //constructor method that initial values for all counters to 7 when the class object created count1=7; count2=7; count3=7; 4 7 10 11 } //method 1 counter void count1() 12 13 14 15 this.count1=this.count1+1; 16 } //method 2 counter void count2() { this.count2=this.cout2+2; } //method 3 counter void count3() { this.count3=this.count3+3; 17 18 28 29}


30 public class Main 31{ public static void main(String [] args) { //creating object for the Three_type_counter class Three_type_counter obj_counter=new Three_type_counter(); //calling methods obj_counter.count1(); obj_counter.count2(); obj_counter.count3(); // printing counter values System.out.println("counter1 :"+obj_counter.count1); System.out.println("counter2 :"+obj_counter.count2); System.out.println("counter3 :"+obj_counter.count3); } 32 33 34 35 36 37 38 39 40 41 42 43 44 } 45

OUTPUT:

counterl :8 counter2 9 counter3 10