October 2013

package package1;

public class A {
    protected int a=10;
    private int b=12;
    public int c=14;
    int d=16;
    public void print(){
        System.out.println("Package1 and access A class");
        System.out.println("Protected variable ="+ a);
        System.out.println("Private variable ="+ b);
        System.out.println("Public variable ="+ c);
        System.out.println("Default variable ="+ d);

        A aa=new A();

        System.out.println("Protected variable ="+ aa.a);
        System.out.println("Private variable ="+ aa.b);
        System.out.println("Public variable ="+ aa.c);
        System.out.println("Default variable ="+ aa.d);

    }

}
//...............................................................................//
package package1;

public class B extends A{
    public void print(){
       System.out.println("Package1 and access B class");
       System.out.println("Protected variable ="+ a);
       //System.out.println("Private variable ="+ b);//Look Private is not accessible in class B
       System.out.println("Public variable ="+ c);
       System.out.println("Default variable ="+ d);

       A aa=new A();

       System.out.println("Protected variable ="+ aa.a);
       //System.out.println("Private variable ="+ aa.b);// Same things here
       System.out.println("Public variable ="+ aa.c);
       System.out.println("Default variable ="+ aa.d);
    }

}

//.................................................................................//
package package1;

public class C {
    public void print(){
       A cc=new A();
       System.out.println("Package1 and access C class");
    //   System.out.println("Protected variable ="+ a);
       //System.out.println("Private variable ="+ b);
    //   System.out.println("Public variable ="+ c);
    //   System.out.println("Default variable ="+ d);

       //A aa=new A();

       System.out.println("Protected variable ="+ cc.a);
    //   System.out.println("Private variable ="+ aa.b);
       System.out.println("Public variable ="+ cc.c);
       System.out.println("Default variable ="+ cc.d);
    }
}

//...............................................................//
package Package2;

import package1.A;
public class AA extends A{
    public void print(){
       System.out.println("Package2 and access AA class");
       System.out.println("Protected variable ="+ a);
    //   System.out.println("Private variable ="+ b);
       System.out.println("Public variable ="+ c);
       //System.out.println("Default variable ="+ d);

       A aa=new A();

    //   System.out.println("Protected variable ="+ aa.a);
    //   System.out.println("Private variable ="+ aa.b);
       System.out.println("Public variable ="+ aa.c);
    //   System.out.println("Default variable ="+ aa.d);

    }

}

//...................................................................//
package Package2;

import package1.A;

public class BB {
    public void print(){
       System.out.println("Package2 and access BB class");
    //   System.out.println("Protected variable ="+ a);
    //   System.out.println("Private variable ="+ b);
    //   System.out.println("Public variable ="+ c);
    //   System.out.println("Default variable ="+ d);
    //
       A aa=new A();

    //   System.out.println("Protected variable ="+ aa.a);
    //   System.out.println("Private variable ="+ aa.b);
       System.out.println("Public variable ="+ aa.c);
    //   System.out.println("Default variable ="+ aa.d);

    }

}

Programming

Pages

public,protected,private and default access modifiers in java simple example

package package1;