Answer 1

it would be better to do it in while loop!
make sure import math libraries and
just like:

double x0=1, dx=0.05, xn=2,x=x0,v;
while (x=<xn){
v=10*x + sin(abs(x-6.25));
x+=dx;
}

for loop:
double x=0;
for (int i=200; i=<400; i++){
x = i/200;
v=10*x + sin(abs(x-6.25));
}

If anything goes wrong let me know, because I didn't programmed in java for 5 years!
Good luck!