Question: Does Redis Use Java?

Answer

Redis, an in-memory data structure store, primarily uses the C programming language for its implementation. It does not use Java directly for core functionality. However, Redis offers numerous client libraries to facilitate communication with a Redis server, including Java-based clients.

For Java applications, you can use Jedis or Lettuce as popular Java client libraries to interact with Redis. They allow you to perform operations with Redis using Java code. Here are basic examples for connecting and setting/getting a key with both libraries:

Using Jedis:

// Import required package
import redis.clients.jedis.Jedis;

public class RedisDemo {
    public static void main(String[] args) {
        // Connect to a local Redis instance
        Jedis jedis = new Jedis("localhost");
        
        // Set and get a key-value pair
        jedis.set("key", "value");
        System.out.println("Value of the key: " + jedis.get("key"));
    }
}

Using Lettuce:

// Import required packages
import io.lettuce.core.RedisClient;
import io.lettuce.core.api.StatefulRedisConnection;
import io.lettuce.core.api.sync.RedisCommands;

public class RedisDemo {
    public static void main(String[] args) {
        // Connect to a local Redis instance
        RedisClient redisClient = RedisClient.create("redis://localhost");
        StatefulRedisConnection<String, String> connection = redisClient.connect();
        RedisCommands<String, String> syncCommands = connection.sync();

        // Set and get a key-value pair
        syncCommands.set("key", "value");
        System.out.println("Value of the key: " + syncCommands.get("key"));

        // Close the connection and client
        connection.close();
        redisClient.shutdown();
    }
}

These examples demonstrate how to use Java-based clients to interact with a Redis server, even though the core Redis implementation is not in Java.