Mutable charges. ModifyCharge (PROGRAM 3.2.1) so that the charge value q is not final, and...

Mutable charges. ModifyCharge (PROGRAM 3.2.1) so that the charge value q is not final, and add a method increaseCharge () that takes a double argument and adds the given value to the charge. Then, write a client that initializes an array with

Charged a = new Charge[3];a[0] = new Charge(0.4, 0.6, 50);a[l] = new Charge(0.5, 0.5, −5);a[2] = new Charge(0.6, 0.6, 50);

and then displays the result of slowly decreasing the charge value of a [i] by wrapping the code that computes the picture in a loop like the following:

for (int t = 0; t<100; t++){   // Compute the picture.   picture.show();   a[1].i ncreaseCharge(−2.0);}

Mutating a charge

Program 3.2.1 Charged particle