what is the use of void load() method in this program?

Hi Lakshmi,

There are two load methods within the PezDispenser class. These are:

public void load() {
    load(MAX_PEZ);
}

and

public void load(int pezAmount) {
    int newAmount = mPezCount + pezAmount;
    if(newAmount > MAX_PEZ) {
        throw new IllegalArgumentException("Too many Pez!");
    }
    mPezCount += pezAmount;
}

Although they are both called load, they are different. This is known as method signatures. Essentially the combination of the name and the parameters it is called with. With regards to the above two, the first is called to load an empty dispenser with a full set of Pez. This is the same as calling:

dispenser.load(12);

I agree that it is likely redundant in the code, but is a good demonstration of the use of constants and method signatures which is the concept of this kind of tutorial. Potentially it could be refactored.

Hope this helps