What do two semicolons mean in Java for loop? [duplicate]

Question

I was looking inside the AtomicInteger Class and I came across the following method:

/**  * Atomically increments by one the current value.  *  * @return the previous value  */ public final int getAndIncrement() {     for (;;) {         int current = get();         int next = current + 1;         if (compareAndSet(current, next))             return current;     } } 

Can someone explain what for(;;) means?

Answer 1

It is equivalent to while(true).

A for-loop has three elements:

• initializer
• condition (or termination expression)
• increment expression

for(;;) is not setting any of them, making it an endless loop.

Reference: The for statement