To run a client-server program in Java, you will need to first compile the source code using the Java compiler (javac) and then run the compiled code using the Java runtime (java). Here are the general steps to run a client-server program in Java:
- Open a command-line interface (CLI) or terminal window.
- Navigate to the directory where the source code for the client-server program is located.
- Compile the source code for the server using the javac command. For example:
javac Server.java
- Compile the source code for the client using the javac command. For example:
javac Client.java
- Run the server program using the java command. For example:
java Server
- Open a new CLI or terminal window.
- Navigate to the same directory where the source code for the client-server program is located.
- Run the client program using the java command. For example:
java Client
It’s worth noting that the above steps are for a simple scenario, in real-world scenarios you may need to take care of other issues such as security, error handling, and performance. Additionally, you may need to configure the firewall on the server machine to allow incoming connections on the port used by the server.
Also, it’s worth noting that you can run the client and server on different machines, in that case you need to specify the IP address or hostname of the machine running the server in the client program.
It is also important to make sure that the version of the JDK you are using is compatible with the version of the JRE (Java runtime environment) you are running.