update load balancer directory name

implementations/java/load_balancing_algorithms/LeastConnections.java

@@ -0,0 +1,36 @@
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class LeastConnections {
+    private Map<String, Integer> serverConnections;
+
+    public LeastConnections(List<String> servers) {
+        serverConnections = new HashMap<>();
+        for (String server : servers) {
+            serverConnections.put(server, 0);
+        }
+    }
+
+    public String getNextServer() {
+        return serverConnections.entrySet().stream()
+                .min(Map.Entry.comparingByValue())
+                .map(Map.Entry::getKey)
+                .orElse(null);
+    }
+
+    public void releaseConnection(String server) {
+        serverConnections.computeIfPresent(server, (k, v) -> v > 0 ? v - 1 : 0);
+    }
+
+    public static void main(String[] args) {
+        List<String> servers = List.of("Server1", "Server2", "Server3");
+        LeastConnections leastConnectionsLB = new LeastConnections(servers);
+
+        for (int i = 0; i < 6; i++) {
+            String server = leastConnectionsLB.getNextServer();
+            System.out.println(server);
+            leastConnectionsLB.releaseConnection(server);
+        }
+    }
+}