Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
1.5k views
in Technique[技术] by (71.8m points)

java - atomic increment of long variable?

if a long variable is declared as :-

private volatile long counter = 0;

now if i increment it using pre-increment operator, then would the operation be atomic ?

if yes, then will it be more efficient than java.util.concurrent.atomic.AtomicLong object's increment ??

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

volatile keyword only solves visibility problem. You have to use AtomicLong or synchronized method/block for atomicity (Atomicity in concurrent programming).

One more article that came out today: Demonstrating when volatile is required


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...