Add enum name mapping to Java generators (#17018)

* add enum name mapping to java generators

* update doc

* update description

samples/client/petstore/java/okhttp-gson/api/openapi.yaml

@@ -1861,6 +1861,8 @@ components:
       - placed
       - approved
       - delivered
+      - s
+      - S
       nullable: true
       type: string
     OuterEnumInteger:

samples/client/petstore/java/okhttp-gson/docs/OuterEnum.md

@@ -11,5 +11,9 @@
 
 * `DELIVERED` (value: `"delivered"`)
 
+* `LOWER_CASE_S` (value: `"s"`)
+
+* `UPPER_CASE_S` (value: `"S"`)
+
 
 

samples/client/petstore/java/okhttp-gson/src/main/java/org/openapitools/client/model/OuterEnum.java

@@ -33,7 +33,11 @@ public enum OuterEnum {
   
   APPROVED("approved"),
   
-  DELIVERED("delivered");
+  DELIVERED("delivered"),
+  
+  LOWER_CASE_S("s"),
+  
+  UPPER_CASE_S("S");
 
   private String value;