Apache Wangye

Java garbage collection reclaims heap objects that are no longer reachable from a set of GC roots. Roots include active thread stacks, static fields, JNI references, and JVM-internal structures.

Ubuntu 20.04 is aging, so confirm support for the selected Kubernetes and container-runtime versions before deployment.

AbstractQueuedSynchronizer (AQS) is the framework behind many Java concurrency utilities, including locks, semaphores, latches, and read-write synchronization.

Calling Thread.start() asks the JVM to create a new execution thread. Calling run() directly does not create a thread; it executes on the current caller.

After a mapper method resolves its MappedStatement, MyBatis delegates database work to an Executor.

MyBatis startup converts XML, annotations, type aliases, handlers, environments, and mapper definitions into a central Configuration object.

Every palindrome has a center. Expand around each character for odd-length palindromes and around each adjacent pair for even-length palindromes.

The direct approach merges both sorted arrays and selects the middle value. It is simple and runs in O(m+n) time.

Use a sliding window whose left boundary always remains after the previous occurrence of the current character.

Each linked list stores a non-negative integer in reverse digit order. Add corresponding nodes and return the sum in the same representation.