Abstract Factory Pattern

Abstract Factory Pattern: provides an interface for creating families of related or dependent objects without specifying concrete classes.

Example

Account.java

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package com.abstractfactorypattern.example;   public interface Account {  //define generic methods required }

SavingsAccount.java

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package com.abstractfactorypattern.example;   public class SavingsAccount implements Account {     public String toString() {   return "Savings Account created Succesfully";  }    }

CheckingAccount.java

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package com.abstractfactorypattern.example;   public class CheckingAccount implements Account {    public String toString() {   return "Checking Account created Succesfully";  }   }

LoanAccount.java

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package com.abstractfactorypattern.example;   public class LoanAccount implements Account {    public String toString() {   return "Loan Account created Succesfully";  }   }

AbstractAccountFactory.java

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package com.abstractfactorypattern.example;   public abstract class AbstractAccountFactory {  public abstract Account createSavingsAccount();  public abstract Account createCheckingAccount();  public abstract Account createLoanAccount();    }

AccountFactory.java

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package com.abstractfactorypattern.example;   public class AccountFactory extends AbstractAccountFactory {     public Account createSavingsAccount(){   return new SavingsAccount();  }  public Account createCheckingAccount(){   return new CheckingAccount();  }  public Account createLoanAccount(){   return new LoanAccount();  }    }

AccountTestDrive.java

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package com.abstractfactorypattern.example;   import java.util.ArrayList; import java.util.List;   public class AccountTestDrive {     public static void main(String[] args) {   List<account> accountList= new ArrayList<>();   //AbstractAccount defines Account Factories   AbstractAccountFactory accountFactory = new AccountFactory();   //Using Factory to get Account instance   Account savingsAccount = accountFactory.createSavingsAccount();   Account checkingAccount = accountFactory.createCheckingAccount();   Account loanAccount = accountFactory.createLoanAccount();   accountList.add(savingsAccount);   accountList.add(checkingAccount);   accountList.add(loanAccount);       for (Account account : accountList) {    System.out.println(account);   }      } } </account>

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