diff --git a/.changeset/petite-nights-add.md b/.changeset/petite-nights-add.md
new file mode 100644
index 000000000..72ae3e208
--- /dev/null
+++ b/.changeset/petite-nights-add.md
@@ -0,0 +1,5 @@
+---
+'@graphql-codegen/java': patch
+---
+
+Fix complex (non-scalar) input collections
diff --git a/packages/plugins/java/java/src/visitor.ts b/packages/plugins/java/java/src/visitor.ts
index 2fb80a607..1c693e4ac 100644
--- a/packages/plugins/java/java/src/visitor.ts
+++ b/packages/plugins/java/java/src/visitor.ts
@@ -237,7 +237,9 @@ export class JavaResolversVisitor extends BaseVisitor<
           }
           return indentMultiline(
             `if (args.get("${arg.name.value}") != null) {
-		this.${arg.name.value} = (${this.config.listType}<${typeToUse.baseType}>) args.get("${arg.name.value}");
+  this.${arg.name.value} = ((${this.config.listType}<Map<String, Object>>) args.get("${arg.name.value}")).stream()
+    .map(o -> o == null ? null : new ${typeToUse.baseType}(o))
+    .collect(Collectors.toList());
 }`,
             3,
           );
diff --git a/packages/plugins/java/java/tests/java.spec.ts b/packages/plugins/java/java/tests/java.spec.ts
index bcf66d98f..47526cf2e 100644
--- a/packages/plugins/java/java/tests/java.spec.ts
+++ b/packages/plugins/java/java/tests/java.spec.ts
@@ -158,7 +158,9 @@ describe('Java', () => {
           if (args != null) {
             this.f = (Iterable<String>) args.get("f");
             if (args.get("g") != null) {
-              this.g = (Iterable<SearchUserInput>) args.get("g");
+              this.g = ((Iterable<Map<String, Object>>) args.get("g")).stream()
+               .map(o -> o == null ? null : new SearchUserInput(o))
+               .collect(Collectors.toList());
             }
           }
         }