在Java 9中，我们可以在接口中定义私有方法或私有静态方法吗？

<strong>interface <interface-name> {
   private static void methodName() {
      // some statements
   }
   private void methodName() {
      // some statements
   }
}</strong>

interface Java9Interface {
   public abstract void method1();
   public default void method2() {
      method4();
      method5();
      System.out.println("Inside default method");
   }
   public static void method3() {
      method5();    <strong>//  static method inside other static method</strong>
      System.out.println("Inside static method");
   }
   private void method4() {    <strong>// private method</strong>
      System.out.println("Inside private method");
   }
   private static void method5() {    <strong>// private static method</strong>
      System.out.println("Inside private static method");
   }
}
public class PrivateStaticMethodTest implements Java9Interface {
   @Override
   public void method1() {
       System.out.println("Inside abstract method");
   }
   public static void main(String args[]) {
      Java9Interface instance = new PrivateStaticMethodTest();
      instance.method1();
      instance.method2();
      Java9Interface.method3();
   }
}

<strong>Inside abstract method
Inside private method
Inside private static method
Inside default method
Inside private static method
Inside static method</strong>