performance - Which is better: letting Java do autoboxing or using valueOf()

Question

I am just wondering is there any difference in letting java autobox say an integer:

Integer myInteger = 3; // This will call Integer.valueOf()

or having your code as

Integer myInteger = Integer.valueOf(3);

Is there any micro optimization on this? I know the second one is more explicit, but it is also more unnecessary typing, is there any difference besides this?.

Answer 1

They are equal anyway internally, so use the first variant. Chances are good, that future compiler optimizations may make the first even faster in the future.