#37 Static Variable in JAVA | Skyhighes | Lecture 37
Here's a comprehensive explanation of static variables in Java:
What are static variables?
Class variables: They belong to the class itself, rather than individual objects of the class.
Shared across all objects: Only one copy of a static variable exists, shared by all instances of the class.
Declared with static keyword: Use the static keyword to create a static variable within a class.
Key characteristics:
Memory allocation: Allocated in static memory when the class is loaded, not when objects are created.
Lifetime: Exist throughout the entire program's execution, even if no objects of the class exist.
Access: Can be accessed directly using the class name (e.g., ClassName.staticVariable) or through objects of the class.
Initialization: Can be initialized either directly in their declaration or within a static block.
Example:
Java
class Counter {
static int count = 0; // Static variable
public Counter() {
count++; // Increment count for each object created
}
public static void displayCount() {
System.out.println("Total objects created: " + count);
}
}
Use code with caution. Learn more
Common uses:
Constants: Used to define constants that are shared across the entire application (e.g., Math.PI, Integer.MAX_VALUE).
Counting objects: Keeping track of the number of objects created for a class (as in the example above).
Shared resources: Managing shared resources like database connections or file handles.
Utility classes: Creating utility classes that provide general-purpose functions without the need for object instantiation.
Best practices:
Use static variables judiciously, as overuse can lead to tight coupling and maintainability issues.
Be mindful of thread safety when using static variables in multithreaded environments.
Consider using static factory methods or dependency injection as alternatives for accessing shared resources.
Always initialize static variables to avoid unexpected behavior.
-
3:35:42
FRENCHY4185
4 hours agoROAD TO 200 FOLLOWERS !!! XDEFIANT FT. THE BOYS !!!
12.9K -
1:56:06
2 MIKES LIVE
5 hours ago2 MIKES LIVE #75 OPEN MIKE FRIDAY!
19K -
1:10:46
Edge of Wonder
5 hours agoSpinning Fish, Strange Weather, Secret Bases & More Mandela Effect Proof
13.1K3 -
1:00:36
In The Litter Box w/ Jewels & Catturd
1 day agoLeftists Corrupt EVERYTHING | In the Litter Box w/ Jewels & Catturd - Ep. 582 - 6/7/2024
58.4K83 -
16:35
Breaking Points
1 day agoDC IGNORES Housing Crisis, TOP ISSUE For Gen Z
52.9K35 -
3:33:32
SonnyFaz
3 hours agoBoston Gay Pride Parade...
15K6 -
1:58:56
Revenge of the Cis
6 hours agoEpisode 1345: Beauty Pageant
58.5K14 -
2:19:33
Tucker Carlson
9 hours agoRep. Thomas Massie: Israel Lobbyists, the Cowards in Congress, and Living off the Grid
178K509 -
1:50:22
vivafrei
9 hours agoMiss Alabama & "Miss Maryland" Travesties; Joe Biden's #PoopGate! Hunter's Trial & MORE!
95.9K60 -
55:22
shaneyyricch
7 hours agoWho Would You Rather See in Prison? Hunter Biden or Donald Trump?
44.8K39