// parent , super ,

class sunmicrosoft {

void java(){

System.out.println("java prog ...");

}

}

class google extends sunmicrosoft {

void Android(){

System.out.println("Android app development ...");

}

}

// child , sub , derived

class oracle extends google{

void DBMS(){

System.out.println("sql.............");

}

public static void main(String[] args) {

oracle con = new oracle();

con.DBMS();

con.java();

}

}