Incrementing int value using the getter setter

Question

I have a requirement to increment int value. So I have made getter/setter for it and I applied this logic for the increment value of int:

public class MyOrderDet         


        

Answer 1

Why do you not just do?

public void increment() {
    count++;
}

And what is the int parameter to the increment() function for?

Answer 2

a. If you just want to increment, you don't need to provide any setter.

b. In

public void increment() {
    setCount(getCount() + 1);
}

You can directly access the count variable, so count++ is enough, doesn't need to setCount.

c. Usually need a reset method.

d. count++ is not atomic, so synchronize if it is used in multi-threading scenario.

public synchronized void increment() {
    count++;
}

So finally the class would be:

class Counter{
    private int count = 0;

    public int getCount(){
        return count;
    }

    public synchronized void increment(){
        count++;
    }

    public void reset(){
        count = 0;
    }
}

So you can use the class like:

Counter counter = new Counter();
counter.increment() //increment the counter
int count = counter.getCount();