java rmi example client server
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java rmi (remote method invocation) allows a java program to invoke methods on an object located in another java virtual machine (jvm). this is typically used for building distributed applications where you need to call methods on remote objects as if they were local.
java rmi tutorial
#### key components
1. **remote interface**: this defines the methods that can be invoked remotely.
2. **remote object**: this is the implementation of the remote interface.
3. **server**: this registers the remote object with the rmi registry.
4. **client**: this looks up the remote object in the rmi registry and invokes methods.
step-by-step example
#### 1. create the remote interface
#### 2. implement the remote object
#### 3. create the server
#### 4. create the client
5. compile the code
to compile the code, you need to use the `javac` command:
6. generate rmi stub and skeleton
before running the server, you need to generate the stub and skeleton using the `rmic` tool:
7. run the server
run the server first. open a terminal and execute:
8. run the client
in a separate terminal window, run the client:
output
when you run the client, you should see the following output:
important notes
ensure that the rmi registry is running. the `locateregistry.createregistry(1099)` call in the server creates it if it doesn't already exist.
rmi uses ports, so ensure that your firewall allows traffic on the specified port (1099 in this case).
you can run the server and client on different machines by specifying the appropriate ip address in the client.
conclusion
this tutorial provides a basic overview of how to create a simple client-server application using java rmi. you can expand upon this by adding more complex methods and handling exceptions more robustly.
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