(Association)
Association in Java defines the connection between two classes that
are set up through their objects. Association manages one-to-one,
one-to-many, and many-to-many relationships. In Java, the multiplicity
between objects is defined by the Association. It shows how objects
communicate with each other and how they use the functionality and
services provided by that communicated object.
In Java, two types of Association are possible:
1) IS-A Association (is also referred to as Inheritance)
2) HAS-A Association
a) Aggregation
b) Composition
// Java Program to illustrate the
// Concept of Association
// Importing required classes
import java.io.*;
// Class 1
// Bank class
class Bank {
// Attribures of bank
private String name;
// Constructor of this class
Bank(String name)
{
// this keyword refers to current instance itself
this.name = name;
}
// Method of Bank class
public String getBankName()
{
// Returning name of bank
return this.name;
}
}
// Class 2
// Employee class
class Employee {
// Attribures of employee
private String name;
// Employee name
Employee(String name)
{
// This keyword refwrs to current insytance itself
this.name = name;
}
// Method of Employee class
public String getEmployeeName()
{
// returning the name of employee
return this.name;
}
}
// Class 3
// Association between both the
// classes in main method
class GFG {
// Main driver mmethod
public static void main(String[] args)
{
// Creating objects of bank and Employee class
Bank bank = new Bank("ICICI");
Employee emp = new Employee("Ridhi");
// Print and display name and
// corresponding bank of employee
System.out.println(emp.getEmployeeName()
+ " is employee of "
+ bank.getBankName());
}
}
(Association)
Association in Java defines the connection between two classes that
are set up through their objects. Association manages one-to-one,
one-to-many, and many-to-many relationships. In Java, the multiplicity
between objects is defined by the Association. It shows how objects
communicate with each other and how they use the functionality and
services provided by that communicated object.
In Java, two types of Association are possible:
1) IS-A Association (is also referred to as Inheritance)
2) HAS-A Association
a) Aggregation
b) Composition
// Java Program to illustrate the
// Concept of Association
// Importing required classes
import java.io.*;
// Class 1
// Bank class
class Bank {
// Attribures of bank
private String name;
// Constructor of this class
Bank(String name)
{
// this keyword refers to current instance itself
this.name = name;
}
// Method of Bank class
public String getBankName()
{
// Returning name of bank
return this.name;
}
}
// Class 2
// Employee class
class Employee {
// Attribures of employee
private String name;
// Employee name
Employee(String name)
{
// This keyword refwrs to current insytance itself
this.name = name;
}
// Method of Employee class
public String getEmployeeName()
{
// returning the name of employee
return this.name;
}
}
// Class 3
// Association between both the
// classes in main method
class GFG {
// Main driver mmethod
public static void main(String[] args)
{
// Creating objects of bank and Employee class
Bank bank = new Bank("ICICI");
Employee emp = new Employee("Ridhi");
// Print and display name and
// corresponding bank of employee
System.out.println(emp.getEmployeeName()
+ " is employee of "
+ bank.getBankName());
}
}