all rules of nested class in java code example

Example 1: Nested classes in java

// example on static nested classes java
import java.util.*;
public class OuterClass
{
   static class NestedClass
   {
      public void display() 
      {
         System.out.println("static nested class example");
      }
   }
   public static void main(String[] args) 
   {
      OuterClass.NestedClass nested = new OuterClass.NestedClass();	 
      nested.display();
   }
}

Example 2: Nested classes in java

// how to access private members of a class.
class OuterClass
{
   // outer class private variable
   private int number = 56;
   // inner class
   public class InnerClass
   {
      public int showNumber()
      {
         System.out.println("showNumber() method of inner class.");
         return number;
      }
   }
}
public class AccessPrivateMembers
{
   public static void main(String[] args)
   {
      OuterClass objOuter = new OuterClass();
      OuterClass.InnerClass objInner = objOuter.new InnerClass();
      System.out.println(objInner.showNumber());
   }
}