Array default value requires import of java.util.Arrays (#16246)

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractJavaCodegen.java

@@ -1473,6 +1473,7 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
 
         if ("array".equals(property.containerType)) {
             model.imports.add("ArrayList");
+            model.imports.add("Arrays");
         } else if ("set".equals(property.containerType)) {
             model.imports.add("LinkedHashSet");
             boolean canNotBeWrappedToNullable = !openApiNullable || !property.isNullable;

modules/openapi-generator/src/test/java/org/openapitools/codegen/java/jaxrs/JavaJAXRSSpecServerCodegenTest.java

@@ -251,6 +251,33 @@ public class JavaJAXRSSpecServerCodegenTest extends JavaJaxrsBaseTest {
         output.deleteOnExit();
     }
 
+    @Test
+    public void testGeneratePingDefaultArrayValue() throws Exception {
+        Map<String, Object> properties = new HashMap<>();
+
+        File output = Files.createTempDirectory("test").toFile();
+
+        final CodegenConfigurator configurator = new CodegenConfigurator()
+            .setGeneratorName("jaxrs-spec")
+            .setAdditionalProperties(properties)
+            .setInputSpec("src/test/resources/3_0/ping-array-default.yaml")
+            .setOutputDir(output.getAbsolutePath().replace("\\", "/"));
+
+        final ClientOptInput clientOptInput = configurator.toClientOptInput();
+        DefaultGenerator generator = new DefaultGenerator();
+        List<File> files = generator.opts(clientOptInput).generate();
+
+        validateJavaSourceFiles(files);
+
+        TestUtils.ensureContainsFile(files, output, "src/main/openapi/openapi.yaml");
+
+        Path path = Paths.get(output.toPath() + "/src/gen/java/org/openapitools/model/AnArrayOfString.java");
+
+        assertFileContains(path , "\nimport java.util.Arrays;\n");
+
+        output.deleteOnExit();
+    }
+
     @Test
     public void testGeneratePingNoSpecFile() throws Exception {
         Map<String, Object> properties = new HashMap<>();

modules/openapi-generator/src/test/resources/3_0/ping-array-default.yaml

@@ -0,0 +1,28 @@
+openapi: 3.0.1
+info:
+  title: ping test
+  version: '1.0'
+servers:
+  - url: 'http://localhost:8000/'
+paths:
+  /ping:
+    get:
+      operationId: pingGet
+      responses:
+        '201':
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/AnArrayOfString"
+components:
+  schemas:
+    AnArrayOfString:
+      type: object
+      properties:
+        arrayWithADefaultValue:
+          default:
+            - aString
+          items:
+            type: string
+          type: array