diff --git a/di/src/main/java/org/panda_lang/utilities/inject/DefaultInjector.java b/di/src/main/java/org/panda_lang/utilities/inject/DefaultInjector.java
index 0e69f79..593559b 100644
--- a/di/src/main/java/org/panda_lang/utilities/inject/DefaultInjector.java
+++ b/di/src/main/java/org/panda_lang/utilities/inject/DefaultInjector.java
@@ -63,6 +63,16 @@ public <T> ConstructorInjector<T> forConstructor(Constructor<T> constructor) {
         return new ConstructorInjector<>(this.processor, constructor);
     }
 
+    @Override
+    public <T> FieldsInjector<T> forFields(Class<T> type) {
+        return new FieldsInjector<>(processor, forConstructor(type));
+    }
+
+    @Override
+    public <T> FieldsInjector<T> forFields(Constructor<T> constructor) {
+        return new FieldsInjector<>(processor, forConstructor(constructor));
+    }
+
     @Override
     public <T> T newInstance(Class<T> type, Object... injectorArgs) throws DependencyInjectionException {
         try {
@@ -75,13 +85,14 @@ public <T> T newInstance(Class<T> type, Object... injectorArgs) throws Dependenc
     }
 
     @Override
-    public <T> FieldsInjector<T> forFields(Class<T> type) {
-        return new FieldsInjector<>(processor, forConstructor(type));
-    }
-
-    @Override
-    public <T> FieldsInjector<T> forFields(Constructor<T> constructor) {
-        return new FieldsInjector<>(processor, forConstructor(constructor));
+    public <T> T newInstance(Constructor<T> constructor, Object... injectorArgs) throws DependencyInjectionException {
+        try {
+            T instance = this.forConstructor(constructor).newInstance(injectorArgs);
+            this.invokeAnnotatedMethods(PostConstruct.class, instance, injectorArgs);
+            return instance;
+        } catch (Exception exception) {
+            throw new DependencyInjectionException("Cannot create instance of " + constructor.getDeclaringClass().getSimpleName(), exception);
+        }
     }
 
     @Override
@@ -95,6 +106,27 @@ public <T> T newInstanceWithFields(Class<T> type, Object... injectorArgs) throws
         }
     }
 
+    @Override
+    public <T> T newInstanceWithFields(Constructor<T> constructor, Object... injectorArgs) throws DependencyInjectionException {
+        try {
+            T instance = this.forFields(constructor).newInstance(injectorArgs);
+            this.invokeAnnotatedMethods(PostConstruct.class, instance, injectorArgs);
+            return instance;
+        } catch (Exception exception) {
+            throw new DependencyInjectionException("Cannot create instance of " + constructor.getDeclaringClass().getSimpleName(), exception);
+        }
+    }
+
+    @Override
+    public MethodInjector forMethod(Method method) {
+        return new DefaultMethodInjector(processor, method);
+    }
+
+    @Override
+    public MethodInjector forGeneratedMethod(Method method) throws Exception {
+        return methodInjectorFactory.get().createMethodInjector(processor, method);
+    }
+
     @Override
     public <T> T invokeMethod(Method method, Object instance, Object... injectorArgs) throws DependencyInjectionException {
         try {
@@ -115,16 +147,6 @@ public void invokeAnnotatedMethods(Class<? extends Annotation> annotation, Objec
         }
     }
 
-    @Override
-    public MethodInjector forMethod(Method method) {
-        return new DefaultMethodInjector(processor, method);
-    }
-
-    @Override
-    public MethodInjector forGeneratedMethod(Method method) throws Exception {
-        return methodInjectorFactory.get().createMethodInjector(processor, method);
-    }
-
     @Override
     public <T> @Nullable T invokeParameter(Parameter parameter, Object... injectorArgs) throws Exception {
         return ObjectUtils.cast(processor.fetchValue(new PropertyParameter(parameter), injectorArgs));
diff --git a/di/src/main/java/org/panda_lang/utilities/inject/Injector.java b/di/src/main/java/org/panda_lang/utilities/inject/Injector.java
index 458c796..df01f7a 100644
--- a/di/src/main/java/org/panda_lang/utilities/inject/Injector.java
+++ b/di/src/main/java/org/panda_lang/utilities/inject/Injector.java
@@ -24,16 +24,6 @@
 
 public interface Injector {
 
-    /**
-     * Create a new instance of the specified type using Injector
-     *
-     * @param type the class to instantiate
-     * @param <T>  the type
-     * @return a new instance
-     * @throws DependencyInjectionException if anything happens during the injection
-     */
-    <T> T newInstance(Class<T> type, Object... injectorArgs) throws DependencyInjectionException;
-
     /**
      * Create injector for the given type
      *
@@ -52,16 +42,6 @@ public interface Injector {
      */
     <T> ConstructorInjector<T> forConstructor(Constructor<T> constructor);
 
-    /**
-     * Create a new instance of the specified type using Injector with support for field injection
-     *
-     * @param type the class to instantiate
-     * @param <T>  the type
-     * @return a new instance
-     * @throws DependencyInjectionException if anything happens during the injection
-     */
-    <T> T newInstanceWithFields(Class<T> type, Object... injectorArgs) throws DependencyInjectionException;
-
     /**
      * Create injector for fields (and constructor)
      *
@@ -81,24 +61,44 @@ public interface Injector {
     <T> FieldsInjector<T> forFields(Constructor<T> constructor);
 
     /**
-     * Invoke the method using Injector
+     * Create a new instance of the specified type using Injector
      *
-     * @param method   the method to invoke
-     * @param instance the instance to use (nullable for static context)
-     * @param <T>      the return type
-     * @return the return value
-     * @throws DependencyInjectionException if anything happens during execution of the method
+     * @param type the class to instantiate
+     * @param <T>  the type
+     * @return a new instance
+     * @throws DependencyInjectionException if anything happens during the injection
      */
-    @Nullable <T> T invokeMethod(Method method, @Nullable Object instance, Object... injectorArgs) throws DependencyInjectionException;
+    <T> T newInstance(Class<T> type, Object... injectorArgs) throws DependencyInjectionException;
 
     /**
-     * Invoke methods annotated with the given annotation
+     * Create a new instance of the specified constructor using Injector
      *
-     * @param annotation the annotation to look for
-     * @param instance   the instance to use
-     * @throws DependencyInjectionException if anything happens during execution of the method
+     * @param constructor the constructor to instantiate
+     * @param <T>         the type
+     * @return a new instance
+     * @throws DependencyInjectionException if anything happens during the injection
      */
-    void invokeAnnotatedMethods(Class<? extends Annotation> annotation, Object instance, Object... injectorArgs) throws DependencyInjectionException;
+    <T> T newInstance(Constructor<T> constructor, Object... injectorArgs) throws DependencyInjectionException;
+
+    /**
+     * Create a new instance of the specified type using Injector with support for field injection
+     *
+     * @param type the class to instantiate
+     * @param <T>  type of class
+     * @return a new instance
+     * @throws DependencyInjectionException if anything happens during the injection
+     */
+    <T> T newInstanceWithFields(Class<T> type, Object... injectorArgs) throws DependencyInjectionException;
+
+    /**
+     * Create a new instance of the specified constructor using Injector with support for field injection
+     *
+     * @param constructor the constructor to instantiate
+     * @param <T>         type of class
+     * @return a new instance
+     * @throws DependencyInjectionException if anything happens during the injection
+     */
+    <T> T newInstanceWithFields(Constructor<T> constructor, Object... injectorArgs) throws DependencyInjectionException;
 
     /**
      * Create injector for the given method
@@ -117,6 +117,26 @@ public interface Injector {
      */
     MethodInjector forGeneratedMethod(Method method) throws Exception;
 
+    /**
+     * Invoke the method using Injector
+     *
+     * @param method   the method to invoke
+     * @param instance the instance to use (nullable for static context)
+     * @param <T>      the return type
+     * @return the return value
+     * @throws DependencyInjectionException if anything happens during execution of the method
+     */
+    @Nullable <T> T invokeMethod(Method method, @Nullable Object instance, Object... injectorArgs) throws DependencyInjectionException;
+
+    /**
+     * Invoke methods annotated with the given annotation
+     *
+     * @param annotation the annotation to look for
+     * @param instance   the instance to use
+     * @throws DependencyInjectionException if anything happens during execution of the method
+     */
+    void invokeAnnotatedMethods(Class<? extends Annotation> annotation, Object instance, Object... injectorArgs) throws DependencyInjectionException;
+
     /**
      * Get value that would be used to inject the given parameter
      *