For example, we can use singleton pattern to implement a logger, a configuration manager, a database connection pool, or a cache. Singleton pattern can also help to reduce memory usage, avoid ...

For example, a database connection, a configuration manager, a logger, or a cache. By using a singleton, you can avoid creating multiple objects that consume memory, cause inconsistency, or ...

JDBC : Java Database Connectivity is an API using to access a database.The API use a mechanism for dynamically loading the package java passed in the arguemt, the Driver Manager is used as a ...