diff --git a/.generator/conftest.py b/.generator/conftest.py
index a7953852a0a..98a89ec1223 100644
--- a/.generator/conftest.py
+++ b/.generator/conftest.py
@@ -24,6 +24,7 @@
     format_data_with_schema,
     get_response_type,
     upperfirst,
+    escape_method_reserved_name,
 )
 
 
@@ -75,6 +76,7 @@ def lookup(value, path):
 JINJA_ENV.globals["format_parameters"] = format_parameters
 JINJA_ENV.globals["get_response_type"] = get_response_type
 JINJA_ENV.globals["get_type_at_path"] = openapi.get_type_at_path
+JINJA_ENV.filters["escape_method_reserved_name"] = escape_method_reserved_name
 
 JAVA_EXAMPLE_J2 = JINJA_ENV.get_template("example.j2")
 
diff --git a/.generator/src/generator/cli.py b/.generator/src/generator/cli.py
index 6319d5f92e5..f774166ffcf 100644
--- a/.generator/src/generator/cli.py
+++ b/.generator/src/generator/cli.py
@@ -53,6 +53,7 @@ def cli(specs, output):
     env.filters["inline_docstring"] = formatter.inline_docstring
     env.filters["un_parameterize_type"] = formatter.un_parameterize_type
     env.filters["is_parameterized_type"] = formatter.is_parameterized_type
+    env.filters["escape_method_reserved_name"] = formatter.escape_method_reserved_name
 
     env.globals["enumerate"] = enumerate
     env.globals["get_name"] = openapi.get_name
diff --git a/.generator/src/generator/formatter.py b/.generator/src/generator/formatter.py
index 58bbfe7784b..77bbb658a0e 100644
--- a/.generator/src/generator/formatter.py
+++ b/.generator/src/generator/formatter.py
@@ -23,6 +23,7 @@
     "do",
     "else",
     "enum",
+    "equals",
     "extends",
     "false",
     "final",
@@ -74,6 +75,10 @@
     "\\": "\\\\",
 }
 
+METHOD_KEYWORDS = {
+    "Class",
+}
+
 
 PATTERN_DOUBLE_UNDERSCORE = re.compile(r"__+")
 PATTERN_LEADING_ALPHA = re.compile(r"(.)([A-Z][a-z0-9]+)")
@@ -125,6 +130,14 @@ def untitle_case(value):
 def upperfirst(value):
     return value[0].upper() + value[1:]
 
+def escape_method_reserved_name(method_name):
+    """
+    Escape reserved language keywords for method names like getClass, setClass, isClass, etc.
+    """
+    if method_name in METHOD_KEYWORDS:
+        return f"{method_name}Attribute"
+    return method_name
+
 
 def schema_name(schema):
     if not schema:
diff --git a/.generator/src/generator/templates/modelSimple.j2 b/.generator/src/generator/templates/modelSimple.j2
index 3bfd701b44a..7d8a556535e 100644
--- a/.generator/src/generator/templates/modelSimple.j2
+++ b/.generator/src/generator/templates/modelSimple.j2
@@ -216,7 +216,7 @@ public class {{ name }} {%- if model.get("x-generate-alias-as-model") %} extends
         {%- if schema.additionalProperties is defined and schema.additionalProperties is not false %}{%- if schema.additionalProperties.nullable %}content = JsonInclude.Include.ALWAYS,{%- endif %}{%- endif %}
         value = JsonInclude.Include.{%- if isRequired %}ALWAYS{%- else %}USE_DEFAULTS{%- endif %})
     {%- endif %}
-      public {{ dataType }} get{{ attr|camel_case|upperfirst }}() {
+      public {{ dataType }} get{{ attr|camel_case|upperfirst|escape_method_reserved_name }}() {
         {%- if not isRequired and isNullable %}
         {%- if schema.get("readOnly", False) %}
 
@@ -247,7 +247,7 @@ public class {{ name }} {%- if model.get("x-generate-alias-as-model") %} extends
   {%- endif %}
 
   {%- if not schema.get("readOnly", False) %}
-  public void set{{ attr|camel_case|upperfirst }}({{  dataType }} {{ variableName }}) {
+  public void set{{ attr|camel_case|upperfirst|escape_method_reserved_name }}({{  dataType }} {{ variableName }}) {
     {%- if schema.enum is defined %}
     if (!{{ variableName }}.isValid()) {
         this.unparsed = true;