/** * A simple class used to implement common behavior for various * types of bank accounts. It should be extended to implement * behavior for specific accounts. */public class GeneralAccount {  // unique account identifier  private String accountNumber;  // this will hold the current account balance  protected float balance;  public GeneralAccount( String accountNum ) {    accountNumber = accountNum;  }  public String getAccountNumber() {    return accountNumber;  }  public float getBalance() {    return balance;  }  public void makeDeposit( float amount ) {    balance += amount;  }  public void makeWithdrawal( float amount ) {    balance -= amount;  }}