java rmi github
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introduction to java rmi (remote method invocation)
java rmi (remote method invocation) is a java api that allows objects residing in different java virtual machines (jvms) to communicate with each other. this is particularly useful for distributed applications where objects on different machines need to interact.
key concepts of java rmi
1. **remote interface**: defines the methods that can be called remotely.
2. **implementation class**: implements the remote interface and contains the business logic.
3. **rmi registry**: a simple server-side name service that allows clients to look up remote objects.
4. **client**: the application that looks up the remote object and invokes methods on it.
setting up a basic java rmi project
#### prerequisites
java development kit (jdk) installed.
ide (like intellij idea, eclipse) or a simple text editor.
basic knowledge of java.
code example
in this example, we will create a simple rmi application that allows a client to call a remote method to get a greeting message.
#### step 1: define the remote interface
create a file named `greeting.java`:
#### step 2: implement the remote interface
create a file named `greetingimpl.java`:
#### step 3: create the server
create a file named `rmiserver.java`:
#### step 4: create the client
create a file named `rmiclient.java`:
#### step 5: compile the code
you can compile the code using the following command in the terminal:
#### step 6: start the rmi registry
before running the server, you need to start the rmi registry. you can do this from the terminal:
this command should be run in the directory where your compiled classes are located. you can also run it in a different terminal window.
#### step 7: run the server
in one terminal, run the server:
you should see the message: `greeting service is running...`.
#### step 8: run the client
in another terminal, run the client:
you should see the output: `hello, world!`.
conclu ...
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