abstraction.java

// abstract class BankAccount that cannot be instiatied but can be inherit by subclasses
public abstract class BankAccount{
  private int accountNumber;
  private String accountName;
  private int balance;
  
  public void deposit();
  public void withdraw();
}

public class SavingAccount inherits BankAccount{
  //this subclass savings account has inherited all the properties and methods of the abstract class
  
  //additional and more specific method
  public void interestRate(){
    
  }
}