Using AndroidJavaClass in a java Unity3d plugin

Hi, I'm working with a java plugin on Unity3d. In the java side, I have a static class:

 public class MyClass{
 
      public static void method1(){
 
      }
 
      public static void method2(){
 
      }
 
      public static void method3(){
 
      }
 }

T$$anonymous$$s class is accessed from a c# script in Unity3d:

 public class MyPlugin{
 
      ...
 
      ...
 
     public void method1(){
 
       if (Application.platform == RuntimePlatform.Android){
 
            using (var pluginclass = new AndroidJavaClass("com.myapp.MyClass"))
             {
                 if (pluginclass != null)
                 {
                     pluginclass .CallStatic("method1");
                 }
             }
 
       }
 
       public void method2(){
 
             if (Application.platform == RuntimePlatform.Android){
                 using (var pluginclass = new AndroidJavaClass("com.myapp.MyClass"))
             {
                 if (pluginclass != null)
                 {
                     pluginclass .CallStatic("method2");
                 }
             }
 
       }
 
 
     }
 }

Well, my problem is that I want to know if is efficient call the java methods in that way or if I should use an attribute ( private AndroidJavaClass _androidclass) and instantiate only once.

The script is a singleton and is attached to a game object.

If you need more information, please let me know it. Thanks.