Question

Could you please explain, how this code works?

public void addAfter(int element){

if (this.manyItems == 0){

this.data[current] = element; this.manyItems++;

}

else

{

for (int i=this.manyItems-1; i > this.current; i--)

this.data[i+1] = this.data[i];

this.current++;

this.data[current] = element; this.manyItems++; }

}

Answer 1

1. 
If number of items in the data array is zero then adding element at position current
and then incrementing manyItems by 1.

2.
Otherwise shifting each element by one position and then adding element at current,
and then incrementing manyItems by 1.

Like data in data array is 1,2,3,4,5
If we want to add element 6 then we shift each element by 1 then the data array looks like below
<empty>,1,2,3,4,5
Then we add new element at empty position
So, new array becomes
6,1,2,3,4,5