No, this is not possible. Use Integer instead. Autoboxing takes care of the rest (i.e. for most purposes you can program as if you had actually used int because Java converts to and from Integer automatically for you).
Integer.class is, as you say, a reference to the Class object for the Integer type. int.class is, similarity, a reference to the Class object for the int type. You’re right that this doesn’t sound right; the primitives all have a Class object as a special case. It’s useful for reflection, if you want to tell … Read more
The Class instances for the primitive types are obtainable as you said using e.g. int.class, but it is also possible to get the same values using something like Integer.TYPE. Each primitive wrapper class contains a static field, TYPE, which has the corresponding primitive class instance. You cannot obtain the primitive class via forName, but you … Read more
JIT triggers AFTER a certain piece of code has been executed many times. The HotSpot JVM will try to identify “hot spots” in your code. Hot spots are pieces of your code that are executed many many times. To do this, the JVM will “count” the executions of various instructions, and when it determines a … Read more
Will this allocate a new memory location? Or just replace the original value? Java does not really make any guarantees that variables will correspond to memory locations; for example, your method might be optimized in such a way that i is stored in a register — or might not even be stored at all, if … Read more
You can’t do this in Java and more importantly, you don’t want to do this as this isn’t how Java works. In fact variable names aren’t nearly as important as you think and hardly even exist in compiled code. What is much more important is that you are able to get a reference to your … Read more
Have a look at Genson.It helped me a lot with a similar problem.With Genson you could use generics like int,boolean, lists and so on…Here is a quick example. @GET @Produces(MediaType.APPLICATION_JSON) public Response getMagicList() { List<Object> objList = new ArrayList<>(); stringList.add(“Random String”); stringList.add(121); //int stringList.add(1.22); //double stringList.add(false); //bolean return Response.status(Status.OK).entity(objList).build(); } This will produce a valid … Read more
No. The C# specification rigidly defines that int is an alias for System.Int32 with exactly 32 bits. Changing this would be a major breaking change.
There are three ways in which they’re not safe: long and double aren’t even guaranteed to be updated atomically (you could see half of a write from a different thread) The memory model doesn’t guarantee that you’ll see the latest updates from one thread in another thread, without extra memory barriers of some kind The … Read more
For (non-nullable) object types, Kotlin uses the null value to mark that a lateinit property has not been initialized and to throw the appropriate exception when the property is accessed. For primitive types, there is no such value, so there is no way to mark a property as non-initialized and to provide the diagnostics that … Read more