diff --git a/src/main/java/com/alibaba/ttl/TtlCallable.java b/src/main/java/com/alibaba/ttl/TtlCallable.java
index f7f335eb1..e8a5a90f1 100644
--- a/src/main/java/com/alibaba/ttl/TtlCallable.java
+++ b/src/main/java/com/alibaba/ttl/TtlCallable.java
@@ -128,14 +128,7 @@ public static <T> List<TtlCallable<T>> gets(Collection<? extends Callable<T>> ta
      * @return Wrapped {@link Callable}
      */
     public static <T> List<TtlCallable<T>> gets(Collection<? extends Callable<T>> tasks, boolean releaseTtlValueReferenceAfterCall) {
-        if (null == tasks) {
-            return Collections.emptyList();
-        }
-        List<TtlCallable<T>> copy = new ArrayList<TtlCallable<T>>();
-        for (Callable<T> task : tasks) {
-            copy.add(TtlCallable.get(task, releaseTtlValueReferenceAfterCall, false));
-        }
-        return copy;
+        return gets(tasks, releaseTtlValueReferenceAfterCall, false);
     }
 
     /**
diff --git a/src/main/java/com/alibaba/ttl/TtlRunnable.java b/src/main/java/com/alibaba/ttl/TtlRunnable.java
index a16ec020b..263e0f3a5 100644
--- a/src/main/java/com/alibaba/ttl/TtlRunnable.java
+++ b/src/main/java/com/alibaba/ttl/TtlRunnable.java
@@ -132,14 +132,7 @@ public static List<TtlRunnable> gets(Collection<? extends Runnable> tasks) {
      * @throws IllegalStateException when input is {@link TtlRunnable} already.
      */
     public static List<TtlRunnable> gets(Collection<? extends Runnable> tasks, boolean releaseTtlValueReferenceAfterRun) {
-        if (null == tasks) {
-            return Collections.emptyList();
-        }
-        List<TtlRunnable> copy = new ArrayList<TtlRunnable>();
-        for (Runnable task : tasks) {
-            copy.add(TtlRunnable.get(task, releaseTtlValueReferenceAfterRun, false));
-        }
-        return copy;
+        return gets(tasks, releaseTtlValueReferenceAfterRun, false);
     }
 
     /**