class a {
 
	class b extends a {
		class c extends b	{
			public void sayHello() {
				System.out.println ( "Hello from c" ) ;
			}
		}
	}
	
 
	public static void main(String s[]) {
	//how can i make an object of class c here
		a.b.c cc = new a().new b().new c() ;
		cc.sayHello() ;
		
	}
}

a.java:18: No constructor matching a() found in class a.
        a.b.c cc = new a().new b().new c() ;
                   ^
a.java:18: No enclosing instance of class a is in scope; an explicit one must be
 provided when creating inner class a. b, as in "outer. new Inner()" or "outer.
super()".
        a.b.c cc = new a().new b().new c() ;
                          ^
2 errors

public class a {	
    // The following construtor is needed for JDK1.2
	a() {
	}
	public class b extends a {		
						
		public class c extends b	{		
			
			public c() {
				b.this.super() ; // New for JDK1.2
			}
			
			public void sayHello() {	
				System.out.println ( "Hello from c" ) ;		
			}	
		}	
		
	}		
 
	public static void main(String s[]) {	
		//how can i make an object of class c here		
		a.b.c cc = new a().new b().new c() ;	
		cc.sayHello() ;			
	}
}