Add java implementation for load balancing algorithms

implementations/java/load balancer algorithms/IPHash.java

@@ -0,0 +1,25 @@
+import java.util.List;
+
+public class IPHash {
+    private List<String> servers;
+
+    public IPHash(List<String> servers) {
+        this.servers = servers;
+    }
+
+    public String getNextServer(String clientIp) {
+        int hash = clientIp.hashCode();
+        int serverIndex = Math.abs(hash) % servers.size();
+        return servers.get(serverIndex);
+    }
+
+    public static void main(String[] args) {
+        List<String> servers = List.of("Server1", "Server2", "Server3");
+        IPHash ipHash = new IPHash(servers);
+
+        List<String> clientIps = List.of("192.168.0.1", "192.168.0.2", "192.168.0.3");
+        for (String ip : clientIps) {
+            System.out.println(ip + " is mapped to " + ipHash.getNextServer(ip));
+        }
+    }
+}