fix(java): use client-class-name for exception type in README

generators/java-v2/sdk/src/SdkGeneratorContext.ts

@@ -239,7 +239,10 @@ export class SdkGeneratorContext extends AbstractJavaGeneratorContext<SdkCustomC
     }
 
     public getApiExceptionClassName(): string {
-        return this.customConfig?.["base-api-exception-class-name"] ?? `${this.getBaseNamePrefix()}ApiException`;
+        return (
+            this.customConfig?.["base-api-exception-class-name"] ??
+            `${this.customConfig?.["client-class-name"] ?? this.getBaseNamePrefix()}ApiException`
+        );
     }
 
     public getHttpResponseClassName(): string {

generators/java/sdk/versions.yml

@@ -1,4 +1,15 @@
 # yaml-language-server: $schema=../../../fern-versions-yml.schema.json
+- version: 4.0.5
+  changelogEntry:
+    - summary: |
+        Fix generated README exception handling snippet using `{org}ApiException`
+        instead of `{clientClassName}ApiException` when `client-class-name` is
+        specified in the Java custom config. The README now uses the same exception
+        type name that is actually generated in the SDK.
+      type: fix
+  createdAt: "2026-03-25"
+  irVersion: 65
+
 - version: 4.0.4
   changelogEntry:
     - summary: |