package JavaEntry;

// abstract class: using it we hiding certain details and showing only essential information to the user.

// Interfaces, hide certain details and only show the important details of an object.

abstract class UserDetails {

String name = "Banti Shaw";

String universityName = "SMU";

String getUserDetails(){

return name + " " + universityName;

}

}

class ForUseUserDetails extends UserDetails {

public String getName = getUserDetails();

}

interface Student {

String name = "Ganesh";

String universityName = "Unknown";

default String getStudentDetails(){

return name;

}

}

class ForInterfaceUse implements Student {

public String studentName = getStudentDetails();

}

// enum is a special "class" that represents a group of constants (unchangeable variables, like final variables).

enum Process {

TODO,

INDEVELOPMENT,

REVIEW,

DONE

}

public class Ex16ClassAbsInterface {

public static void main(String[] args){

// UserDetails userObj = new UserDetails(); // We can't create the object with abstract class.

ForUseUserDetails extendedUserObj = new ForUseUserDetails();

System.out.println(extendedUserObj.getName);

ForInterfaceUse interfaceStudentObj = new ForInterfaceUse();

System.out.println(interfaceStudentObj.studentName);

Process currState = Process.TODO;

Process devState = Process.INDEVELOPMENT;

System.out.println(currState + " " + devState);

switch(currState){

case TODO:

System.out.println("Work is on " + currState + " state");

break;

case INDEVELOPMENT:

System.out.println("Work is on " + currState + " state");

break;

case REVIEW:

System.out.println("Work is on " + currState + " state");

break;

case DONE:

System.out.println("Work is on " + currState);

break;

default:

System.out.println("No Work");

break;

}

for(Process enumItem : Process.values()){

System.out.println("Process name - " + enumItem);

}

}

}