Final answer:
Implementing server functions in Java involves using Java APIs for date, time, and memory use; and executing system commands for uptime, netstat, current users, and running processes.
Step-by-step explanation:
Implementing Server Functions in Java
Creating a socket server in Java that can perform various system information tasks requires leveraging the capabilities of the Java platform and, in some cases, executing system commands. Below, I provide a skeletal structure for the specific server functionalities you've outlined.
Date and Time: You can get the server's date and time by using java.util.Date or java.time.LocalDateTime from the Java API.
Uptime: Calculating uptime involves capturing the system's uptime at server start and computing the difference with the current time. There is no direct Java API, so you may need to execute a system-specific command or use ManagementFactory.getRuntimeMXBean().
Memory Use: To get the current memory usage, use Runtime.getRuntime() to get the runtime object and query memory details with methods like totalMemory() and freeMemory().
Netstat: This typically requires executing the netstat system command since there's no direct Java API. You can run external commands using Runtime.exec() and process the output.
Current Users: Listing current users is system-specific and may require executing commands such as who or querying system files.
Running Processes: You can list running processes via the ProcessHandle API introduced in Java 9, or by executing system-specific commands like ps on UNIX systems.
Each of these server functions would likely be encapsulated within their own method and could be triggered by specific client requests received by the server over the network connection established by the sockets.