What is the difference between Serial and Parallel Garbage Collector in Java?

Question

I am looking for detailed knowledge on serial and parallel ports along with use cases that tells when these ports are used ?

Answer 1

both the serial and parallel collectors cause a stop-the-world during the Garbage Collection .

so what's the difference between them?

a serial collector is a default copying collector which uses only one Garbage Collection thread for the Garbage Collection operation, while a parallel collector uses multiple Garbage Collection threads for the Garbage Collection operation.