An Integer (with capital I) holds a reference to an object of (class) type Integer, or to null. Java automatically casts between the two; from Integer to int whenever the Integer object occurs as an …

Mar 18, 2014 · Java handles primitive types versus class types in a schizophrenic way by defining two types for each primitive. For instance int is the primitive type and Integer the class type. When you …

As of Java 1.5, you can pretty much interchange Integer with int in many situations. However, I found a potential defect in my code that surprised me a bit. The following code: Integer cdiCt = ....

Java uses pass by value, not by reference. Changing the reference inside a method won't be reflected into the passed-in reference in the calling method. Integer is immutable. There's no such method like …

Your choices are to wrap the integer in an object (or array), pass that in and update, return a value, or make the integer a class/instance variable. Which is better depends on the situation.

In Java 5+, you can just write playerID++. As a side note, never ever call Integer 's constructor. Take advantage of autoboxing by just assigning int s to Integer s directly, like Integer foo = 5. This will use …

Jan 3, 2014 · Regarding my previous Question, Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128? , we know that Integer class has a cache which stores values …

May 16, 2012 · 104 the Integer class is provided so that values can be boxed/unboxed in a pure OO manner. use int where appropriate unless you specifically need to use it in an OO way; in which case …

May 4, 2012 · The method public static int parseInt(String str) and public static int parseInt(String str, int redix) How does it work? & what is the difference between them?

I know this is probably very stupid, but a lot of places claim that the Integer class in Java is immutable, yet the following code: Integer a=3; Integer b=3; a+=b; System.out.println(a); Executes