Write the definition of a class Counter containing: An instance variable named counter of type int. An instance variable named counterID of type int. A static int variable nCounters which is initialized to zero. A constructor hat takes an int argument and assigns its value to counter. It also adds one to the static variable nCounters and assigns the result to the instance variable counterID. A method named increment. It does not take parameters or return a value; it just adds one to the instance variable counter. A method named decrement that also doesn’t take parameters or return a value; it just subtracts one from the counter. A method named getValue. It returns the value of the instance variable counter. A method named getCounterID: it returns the value of the instance variable counterID.
Language: Java
Challenge:
Write the definition of a class Counter containing:
- An instance variable named counter of type int.
- An instance variable named counterID of type int.
- A static int variable nCounters which is initialized to zero.
- A constructor hat takes an int argument and assigns its value to counter. It also adds one to the static variable nCounters and assigns the result to the instance variable counterID .
- A method named increment. It does not take parameters or return a value; it just adds one to the instance variable counter.
- A method named decrement that also doesn’t take parameters or return a value; it just subtracts one from the counter.
- A method named getValue. It returns the value of the instance variable counter.
- A method named getCounterID: it returns the value of the instance variable counterID.
SOLUTION:
Language: Java
Challenge:
Write the definition of a class Counter containing:
- An instance variable named counter of type int.
- An instance variable named counterID of type int.
- A static int variable nCounters which is initialized to zero.
- A constructor hat takes an int argument and assigns its value to counter. It also adds one to the static variable nCounters and assigns the result to the instance variable counterID .
- A method named increment. It does not take parameters or return a value; it just adds one to the instance variable counter.
- A method named decrement that also doesn’t take parameters or return a value; it just subtracts one from the counter.
- A method named getValue. It returns the value of the instance variable counter.
- A method named getCounterID: it returns the value of the instance variable counterID.
Solution:
public class Counter{ private int counter; private int counterID; private static int nCounters=0; public Counter(int c){ counter=c; nCounters++; counterID=nCounters; } public void increment(){ counter++; } public void decrement(){ counter--; } public int getValue(){ return counter; } public int getCounterID(){ return counterID; } }