update load balancer directory name

implementations/java/load_balancing_algorithms/LeastResponseTime.java

@@ -0,0 +1,58 @@
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+public class LeastResponseTime {
+    private List<String> servers;
+    private List<Double> responseTimes;
+
+    public LeastResponseTime(List<String> servers) {
+        this.servers = servers;
+        this.responseTimes = new ArrayList<>(servers.size());
+        for (int i = 0; i < servers.size(); i++)
+            responseTimes.add(0.0);
+    }
+
+    public String getNextServer() {
+        double minResponseTime = responseTimes.get(0);
+        int minIndex = 0;
+        for (int i = 1; i < responseTimes.size(); i++) {
+            if (responseTimes.get(i) < minResponseTime) {
+                minResponseTime = responseTimes.get(i);
+                minIndex = i;
+            }
+        }
+        return servers.get(minIndex);
+    }
+
+    public void updateResponseTime(String server, double responseTime) {
+        int index = servers.indexOf(server);
+        responseTimes.set(index, responseTime);
+    }
+
+    public static double simulateResponseTime(String server) {
+        // Simulating response time with random delay
+        Random random = new Random();
+        double delay = 0.1 + (1.0 - 0.1) * random.nextDouble();
+        try {
+            Thread.sleep((long) (delay * 1000));
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+        return delay;
+    }
+
+    public static void main(String[] args) {
+        List<String> servers = List.of("Server1", "Server2", "Server3");
+        LeastResponseTime leastResponseTimeLB = new LeastResponseTime(servers);
+
+        for (int i = 0; i < 6; i++) {
+            String server = leastResponseTimeLB.getNextServer();
+            System.out.println("Request " + (i + 1) + " -> " + server);
+            double responseTime = simulateResponseTime(server);
+            leastResponseTimeLB.updateResponseTime(server, responseTime);
+            System.out.println("Response Time: " + String.format("%.2f", responseTime) + "s");
+        }
+
+    }
+}