JAVA PROGRAM • LEVEL 15 — MULTITHREADING & CONCURRENCY
Update an AtomicInteger in Java
Learn update an atomicinteger in java with a complete, compiler-ready Java 17 example.
PROBLEM UNDERSTANDING
Input and expected output
No input required
1000
COMPLETE JAVA 17 PROGRAM
Complete Java 17 implementation
import java.util.concurrent.atomic.*;
class Main{public static void main(String[] args)throws Exception{AtomicInteger count=new AtomicInteger();Thread a=new Thread(()->{for(int i=0;i<500;i++)count.incrementAndGet();});Thread b=new Thread(()->{for(int i=0;i<500;i++)count.incrementAndGet();});a.start();b.start();a.join();b.join();System.out.println(count.get());}}CURRENT STEP
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SELECTED LINE
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EXPECTED OUTPUT FOR THE SAMPLE
1000
PROGRAM EXPLANATION
Algorithm and explanation
- Initialize the deterministic sample values used for update an atomicinteger in java.
- Create the required object and apply AtomicInteger and Lock-free update to its state or behavior.
- Print the final result and compare it with the documented sample output.
This Java 17 example demonstrates AtomicInteger and Lock-free update through a complete, executable program. The values are intentionally small so students can trace each statement, verify the output, and then modify the example safely in the online compiler.
EFFICIENCY
Time and space complexity
O(n)
O(1)
DEBUGGING CHECKLIST
Common mistakes
Keep the class name Main and the entry method signature public static void main(String[] args) when using the online compiler.
Check the loop boundary and update expression carefully to avoid skipping the final value or creating an infinite loop.
Java is case-sensitive, and every statement that requires a semicolon must end with one.