38_AccessModifier

// access modifier = layer of security
// package = collection of classes
// class = collection of code
// public = diff class diff package 
// default = diff class same package
// private = 
// protected = subclass

<A.java>
package package1;
import package2.*;
public class A {
    public static void main(String[] args){
        //TODO Auto-generated method stub
        B b = new B();
        System.out.println(b.privateMessage);
    }
}

<B.java>
package package1;
import package2.*;
public class b {
    private String privateMessage = "This is private";
}

<C.java>
import package1.*;
public class C {
    public String publicMessage="This is public";
    protected String protectedMessage = "This is protected";
            String defaultMessage = "This is the default";
            private String privateMessage = "This is private";
}

<Asub.java>
package package2;
import package1.*;
public class Asub extends A{
    public static void main(String[] args){
        //TODO Auto-generated method stub
        Asub asub = new Asub();
        System.out.println(asub.protectedMessage);
    }
}