diff --git a/pkgs/jni/java/src/main/java/com/github/dart_lang/jni/PortProxyBuilder.java b/pkgs/jni/java/src/main/java/com/github/dart_lang/jni/PortProxyBuilder.java
index 266a5e763..178d25115 100644
--- a/pkgs/jni/java/src/main/java/com/github/dart_lang/jni/PortProxyBuilder.java
+++ b/pkgs/jni/java/src/main/java/com/github/dart_lang/jni/PortProxyBuilder.java
@@ -85,7 +85,7 @@ private static void appendType(StringBuilder descriptor, Class<?> type) {
   }
 
   public void addImplementation(
-    String binaryName, long port, long functionPointer, List<String> asyncMethods) {
+      String binaryName, long port, long functionPointer, List<String> asyncMethods) {
     implementations.put(binaryName, new DartImplementation(port, functionPointer));
     this.asyncMethods.addAll(asyncMethods);
   }
@@ -103,8 +103,8 @@ public Object build() throws ClassNotFoundException {
       classes.add(Class.forName(binaryName));
     }
     Object obj =
-      Proxy.newProxyInstance(
-        classes.get(0).getClassLoader(), classes.toArray(new Class<?>[0]), this);
+        Proxy.newProxyInstance(
+            classes.get(0).getClassLoader(), classes.toArray(new Class<?>[0]), this);
     for (DartImplementation implementation : implementations.values()) {
       cleaner.register(obj, implementation.port);
     }
@@ -115,13 +115,13 @@ public Object build() throws ClassNotFoundException {
   /// [0]: The address of the result pointer used for the clean-up.
   /// [1]: The result of the invocation.
   private static native Object[] _invoke(
-    long port,
-    long isolateId,
-    long functionPtr,
-    Object proxy,
-    String methodDescriptor,
-    Object[] args,
-    boolean isBlocking);
+      long port,
+      long isolateId,
+      long functionPtr,
+      Object proxy,
+      String methodDescriptor,
+      Object[] args,
+      boolean isBlocking);
 
   private static native void _cleanUp(long resultPtr);
 
@@ -140,14 +140,14 @@ public Object invoke(Object proxy, Method method, Object[] args) throws Throwabl
     String descriptor = getDescriptor(method);
     boolean isBlocking = !asyncMethods.contains(descriptor);
     Object[] result =
-      _invoke(
-        implementation.port,
-        isolateId,
-        implementation.pointer,
-        proxy,
-        descriptor,
-        args,
-        isBlocking);
+        _invoke(
+            implementation.port,
+            isolateId,
+            implementation.pointer,
+            proxy,
+            descriptor,
+            args,
+            isBlocking);
     if (!isBlocking) {
       return null;
     }