diff --git a/classlib/src/main/java/org/teavm/classlib/java/util/TArrayList.java b/classlib/src/main/java/org/teavm/classlib/java/util/TArrayList.java
index 22728d3b7..12146335a 100644
--- a/classlib/src/main/java/org/teavm/classlib/java/util/TArrayList.java
+++ b/classlib/src/main/java/org/teavm/classlib/java/util/TArrayList.java
@@ -16,6 +16,7 @@
 package org.teavm.classlib.java.util;
 
 import java.util.Arrays;
+import java.util.function.Consumer;
 import org.teavm.classlib.java.io.TSerializable;
 import org.teavm.classlib.java.lang.*;
 import org.teavm.classlib.java.util.function.TUnaryOperator;
@@ -187,4 +188,11 @@ public class TArrayList<E> extends TAbstractList<E> implements TCloneable, TSeri
             array[i] = operator.apply(array[i]);
         }
     }
+
+    @Override
+    public void forEach(Consumer<? super E> action) {
+        for (int i = 0; i < size; i++) {
+            action.accept(array[i]);
+        }
+    }
 }
diff --git a/classlib/src/main/java/org/teavm/classlib/java/util/TOptional.java b/classlib/src/main/java/org/teavm/classlib/java/util/TOptional.java
index b7661aa64..901bfe817 100644
--- a/classlib/src/main/java/org/teavm/classlib/java/util/TOptional.java
+++ b/classlib/src/main/java/org/teavm/classlib/java/util/TOptional.java
@@ -21,6 +21,8 @@ import java.util.function.Function;
 import java.util.function.Predicate;
 import java.util.function.Supplier;
 
+import org.teavm.classlib.java.util.stream.TStream;
+
 public final class TOptional<T> {
     private static TOptional<?> emptyInstance;
     private final T value;
@@ -56,6 +58,18 @@ public final class TOptional<T> {
         return value != null;
     }
 
+    public boolean isEmpty() {
+        return value == null;
+    }
+
+    public TStream<T> stream() {
+        if (!isPresent()) {
+            return TStream.empty();
+        } else {
+            return TStream.of(value);
+        }
+    }
+
     public void ifPresent(Consumer<? super T> consumer) {
         if (value != null) {
             consumer.accept(value);