diff --git a/src/com/wentch/redkale/convert/Factory.java b/src/com/wentch/redkale/convert/Factory.java
index 8860bfda8..95c0649ba 100644
--- a/src/com/wentch/redkale/convert/Factory.java
+++ b/src/com/wentch/redkale/convert/Factory.java
@@ -38,7 +38,7 @@ public abstract class Factory<R extends Reader, W extends Writer> {
     //-----------------------------------------------------------------------------------
     private final HashedMap<Class, Creator> creators = new HashedMap();
 
-    private final Map<String, Class> entitys = new ConcurrentHashMap<>();
+    private final Map<String, Class> entitys = new ConcurrentHashMap();
 
     private final HashedMap<Type, Decodeable<R, ?>> decoders = new HashedMap();
 
@@ -46,7 +46,7 @@ public abstract class Factory<R extends Reader, W extends Writer> {
 
     private final HashMap<AccessibleObject, ConvertColumnEntry> columnEntrys = new HashMap();
 
-    private final Set<Class> skipIgnores = new HashSet<>();
+    private final Set<Class> skipIgnores = new HashSet();
 
     private boolean skipAllIgnore = false;
 
diff --git a/src/com/wentch/redkale/convert/HashedMap.java b/src/com/wentch/redkale/convert/HashedMap.java
index 09cfa818f..2236f85f8 100644
--- a/src/com/wentch/redkale/convert/HashedMap.java
+++ b/src/com/wentch/redkale/convert/HashedMap.java
@@ -47,7 +47,7 @@ public final class HashedMap<K, V> {
             }
             entry = entry.next;
         }
-        data[index] = new Entry<>(key, value, data[index]);
+        data[index] = new Entry(key, value, data[index]);
         return null;
     }
 
diff --git a/src/com/wentch/redkale/convert/ObjectDecoder.java b/src/com/wentch/redkale/convert/ObjectDecoder.java
index c8377022e..80600ff71 100644
--- a/src/com/wentch/redkale/convert/ObjectDecoder.java
+++ b/src/com/wentch/redkale/convert/ObjectDecoder.java
@@ -64,7 +64,7 @@ public final class ObjectDecoder<R extends Reader, T> implements Decodeable<R, T
             final Type[] virGenericTypes = this.typeClass.getTypeParameters();
             final Type[] realGenericTypes = (type instanceof ParameterizedType) ? ((ParameterizedType) type).getActualTypeArguments() : TYPEZERO;
             this.creator = factory.loadCreator(clazz);
-            final Set<DeMember> list = new HashSet<>();
+            final Set<DeMember> list = new HashSet();
             try {
                 ConvertColumnEntry ref;
                 for (final Field field : clazz.getFields()) {
diff --git a/src/com/wentch/redkale/convert/ObjectEncoder.java b/src/com/wentch/redkale/convert/ObjectEncoder.java
index 198e99d2d..939b9e2c8 100644
--- a/src/com/wentch/redkale/convert/ObjectEncoder.java
+++ b/src/com/wentch/redkale/convert/ObjectEncoder.java
@@ -139,7 +139,7 @@ public final class ObjectEncoder<W extends Writer, T> implements Encodeable<W, T
             if (type == Object.class) return;
             //if (!(type instanceof Class)) throw new ConvertException("[" + type + "] is no a class");
             final Class clazz = this.typeClass;
-            final Set<EnMember> list = new HashSet<>();
+            final Set<EnMember> list = new HashSet();
             final Type[] virGenericTypes = this.typeClass.getTypeParameters();
             final Type[] realGenericTypes = (type instanceof ParameterizedType) ? ((ParameterizedType) type).getActualTypeArguments() : null;
             if (realGenericTypes != null) {