$SQLUseConnectionPool gives the default setting that specifies whether a connection pool is used to retrieve a connection.

Java Connection Management >, InstallJava AddToClassPath ShowJavaConsole ..., Java Classes and Objects >, LoadJavaClass -- load and set up a Java class for use from ...

JavaClass[classname, n] represents a Java class with the specified name.

JavaObjectQ[expr] gives True if expr is a reference to a Java object or Null, and gives False otherwise.

LoadedJavaObjects[] returns a list of the Java objects that have been sent to Mathematica (and not yet released with ReleaseJavaObject).

SetInternetProxy[host, port] sets proxy information in your Java session for accessing the internet.

AllowShortContext is an option to LoadJavaClass (in J/Link) and LoadNETType (in .NET/Link) that specifies whether the class-specific context in which static method and field ...

GetActiveCOMObject[string] acquires an already-running COM object specified by string, which can be either a ProgID (such as "Excel.Application") or a CLSID (such as ...

NETObjectQ[expr] gives True if expr is a valid reference to a .NET object, and False otherwise.

SetComplexType[type] tells .NET/Link to map the specified type to Mathematica Complex numbers.