Why do people still use primitive types in Java?

Question

Since Java 5, we\'ve had boxing/unboxing of primitive types so that int is wrapped to be java.lang.Integer, and so and and so forth.

I see

Answer 1

int loops = 100000000;

long start = System.currentTimeMillis();
for (Long l = new Long(0); l

Milliseconds taken to loop '100000000' times around Long: 468

Milliseconds taken to loop '100000000' times around long: 31

On a side note, I wouldn't mind seeing something like this find it's way into Java.

Integer loop1 = new Integer(0);
for (loop1.lessThan(1000)) {
   ...
}

Where the for loop automatically increments loop1 from 0 to 1000 or

Integer loop1 = new Integer(1000);
for (loop1.greaterThan(0)) {
   ...
}

Where the for loop automatically decrements loop1 1000 to 0.