Sync Factory Method, Abstract Factory, Builder, Prototype to Java 25; fix post/code mismatches

01-creational/builder/HttpClientConfig.java

@@ -0,0 +1,27 @@
+package builder;
+
+public class HttpClientConfig {
+
+    // Director method 1: a health check probe — short timeout, no retries
+    public HttpRequest buildHealthCheck(String baseUrl) {
+        return new HttpRequest.Builder()
+            .url(baseUrl + "/health")
+            .method("GET")
+            .timeoutMs(2_000)     // fast fail for health checks
+            .maxRetries(0)
+            .build();
+    }
+
+    // Director method 2: a resilient POST with standard JSON headers and retries
+    public HttpRequest buildResilientPost(String url, String jsonBody) {
+        return new HttpRequest.Builder()
+            .url(url)
+            .method("POST")
+            .body(jsonBody)
+            .header("Content-Type", "application/json")
+            .header("Accept", "application/json")
+            .timeoutMs(15_000)
+            .maxRetries(3)
+            .build();
+    }
+}