Integer refers to wrapper type in Java whereas int is a primitive type. Everything except primitive data types in Java is implemented just as objects that implies Java is a highly qualified pure …

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 = ....

As you can easily see, method 1 calls Integer.equals() (obviously), methods 2-4 result in exactly the same code, unwrapping the values by means of .intValue() and then comparing them …

I came across a class using Integer variables to capture size to be used in a for loop. Is this good practice or should we use the int primitive data type? Integer size = something.getFields().siz...

Alternatively, you can use an Ints method from the Guava library, which in combination with Java 8's Optional, makes for a powerful and concise way to convert a string into an int:

Feb 21, 2013 · In Java, the integer (long) is also 32 bits, but ranges from -2,147,483,648 to +2,147,483,647. I do not understand how the range is different in Java, even though the …

In this case, the resulting floating-point value will be a correctly rounded version of the integer value, using IEEE 754 round-to-nearest mode (§4.2.4). 5 can be expressed exactly as a double.

May 11, 2017 · Integer is a better option, as it can handle null; for int, null would become 0, silently, if resultSet.getInt(..) is used. Otherwise, it might throw some exception, something like, …

Jul 2, 2009 · How do I convert int [] into List<Integer> in Java? Of course, I'm interested in any other answer than doing it in a loop, item by item. But if there's no other answer, I'll pick that …

May 2, 2011 · Java.util.collections methods usually use the boxed (Object -wrapped) versions, because they need to work for any Object, and a primitive type, like int or long, is not an …