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difference between integer and int

Obedient Ocelot answered on December 5, 2020 Popularity 10/10 Helpfulness 3/10

answer difference between integer and int

related what is the difference between int and integer in java

difference between integer and int

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Int is a primitive data type
On the other hand Integer is a wrapper class that wraps a primitive type
int into an object
Int provides less flexibility as compare to Integer as it only allows the
binary value of an integer in it. The Intege on the other hand is more
flexible in storing and manupulating in data since wrapper class inherit
object class.

Popularity 10/10 Helpfulness 3/10 Language java

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Contributed on Dec 05 2020

Obedient Ocelot

0 Answers Avg Quality 2/10

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what is the difference between int and integer in java

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int is a primitive type. Variables of type int store the actual binary value for the integer you want to represent. int.parseInt("1") doesn't make sense because int is not a class and therefore doesn't have any methods.

Integer is a class, no different from any other in the Java language. Variables of type Integer store references to Integer objects, just as with any other reference (object) type. Integer.parseInt("1") is a call to the static method parseInt from class Integer (note that this method actually returns an int and not an Integer).

To be more specific, Integer is a class with a single field of type int. This class is used where you need an int to be treated like any other object, such as in generic types or situations where you need nullability.

Note that every primitive type in Java has an equivalent wrapper class:

    byte has Byte
    short has Short
    int has Integer
    long has Long
    boolean has Boolean
    char has Character
    float has Float
    double has Double

Wrapper classes inherit from Object class, and primitive don't. So it can be used in collections with Object reference or with Generics.

Since java 5 we have autoboxing, and the conversion between primitive and wrapper class is done automatically. Beware, however, as this can introduce subtle bugs and performance problems; being explicit about conversions never hurts.

Popularity 10/10 Helpfulness 5/10 Language java

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Contributed on Jun 28 2021

Sore Starling

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difference between integer and int

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