diff --git a/app/src/main/java/org/ntlab/developrx/JavaMainActivity.java b/app/src/main/java/org/ntlab/developrx/JavaMainActivity.java
index bd93bbe..bce174b 100644
--- a/app/src/main/java/org/ntlab/developrx/JavaMainActivity.java
+++ b/app/src/main/java/org/ntlab/developrx/JavaMainActivity.java
@@ -19,5 +19,6 @@
         findViewById(R.id.just_btn).setOnClickListener(view -> rxProcess.just());
         findViewById(R.id.fromarray_btn).setOnClickListener(view -> rxProcess.fromArray());
         findViewById(R.id.range_btn).setOnClickListener(view -> rxProcess.range());
+        findViewById(R.id.interval_btn).setOnClickListener(view -> rxProcess.interval());
     }
 }
diff --git a/app/src/main/java/org/ntlab/developrx/JavaRxProcess.java b/app/src/main/java/org/ntlab/developrx/JavaRxProcess.java
index 836ff8a..af1465e 100644
--- a/app/src/main/java/org/ntlab/developrx/JavaRxProcess.java
+++ b/app/src/main/java/org/ntlab/developrx/JavaRxProcess.java
@@ -4,6 +4,8 @@
 import org.reactivestreams.Subscriber;
 import org.reactivestreams.Subscription;
 
+import java.util.concurrent.TimeUnit;
+
 import io.reactivex.BackpressureStrategy;
 import io.reactivex.Flowable;
 import io.reactivex.Observable;
@@ -137,8 +139,19 @@
         flowable.subscribe(new DebugSubscriber<>());
     }
 
+    /**
+     * startから順にcount数のデータを通知する
+     */
     public void range() {
         Flowable<Integer> flowable = Flowable.range(10, 3);
         flowable.subscribe(new DebugSubscriber<>());
     }
+
+    /**
+     * 指定時間ごとに通知を送る
+     */
+    public void interval() {
+        Flowable<Long> flowable = Flowable.interval(1000L, TimeUnit.MILLISECONDS).take(5);
+        flowable.subscribe(data -> System.out.println(ThreadUtil.getCurrentThreadName() + ": " + System.currentTimeMillis() + ": " + "data = " + data));
+    }
 }
diff --git a/app/src/main/res/layout/activity_main_java.xml b/app/src/main/res/layout/activity_main_java.xml
index e131c63..bfe943e 100644
--- a/app/src/main/res/layout/activity_main_java.xml
+++ b/app/src/main/res/layout/activity_main_java.xml
@@ -49,6 +49,14 @@
             android:text="range"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@id/fromarray_btn" />
+
+        <Button
+            android:id="@+id/interval_btn"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="interval"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/range_btn" />
     </android.support.constraint.ConstraintLayout>
 
 </ScrollView>