diff --git a/apm-application-toolkit/apm-toolkit-trace/src/main/java/org/apache/skywalking/apm/toolkit/trace/CallableWrapper.java b/apm-application-toolkit/apm-toolkit-trace/src/main/java/org/apache/skywalking/apm/toolkit/trace/CallableWrapper.java
index 57b66fd37..3f5dd6921 100644
--- a/apm-application-toolkit/apm-toolkit-trace/src/main/java/org/apache/skywalking/apm/toolkit/trace/CallableWrapper.java
+++ b/apm-application-toolkit/apm-toolkit-trace/src/main/java/org/apache/skywalking/apm/toolkit/trace/CallableWrapper.java
@@ -24,8 +24,8 @@ import java.util.concurrent.Callable;
 public class CallableWrapper<V> implements Callable<V> {
     final Callable<V> callable;
 
-    public static <V> CallableWrapper of(Callable<V> r) {
-        return new CallableWrapper<V>(r);
+    public static <V> CallableWrapper<V> of(Callable<V> r) {
+        return new CallableWrapper<>(r);
     }
 
     public CallableWrapper(Callable<V> callable) {
@@ -36,4 +36,4 @@ public class CallableWrapper<V> implements Callable<V> {
     public V call() throws Exception {
         return callable.call();
     }
-}
\ No newline at end of file
+}
diff --git a/apm-application-toolkit/apm-toolkit-trace/src/main/java/org/apache/skywalking/apm/toolkit/trace/SupplierWrapper.java b/apm-application-toolkit/apm-toolkit-trace/src/main/java/org/apache/skywalking/apm/toolkit/trace/SupplierWrapper.java
index 1595772cf..1f8ef2f92 100644
--- a/apm-application-toolkit/apm-toolkit-trace/src/main/java/org/apache/skywalking/apm/toolkit/trace/SupplierWrapper.java
+++ b/apm-application-toolkit/apm-toolkit-trace/src/main/java/org/apache/skywalking/apm/toolkit/trace/SupplierWrapper.java
@@ -24,8 +24,8 @@ import java.util.function.Supplier;
 public class SupplierWrapper<V> implements Supplier<V> {
     final Supplier<V> supplier;
 
-    public static <V> SupplierWrapper of(Supplier<V> r) {
-        return new SupplierWrapper<V>(r);
+    public static <V> SupplierWrapper<V> of(Supplier<V> r) {
+        return new SupplierWrapper<>(r);
     }
 
     public SupplierWrapper(Supplier<V> supplier) {