Question

I am getting the following error with this code:

BankingServant is not abstract and does not override abstract method
CheckBalance(String) in BankingOperations public class BankingServant
extends _BankingImplBase

Here is my code:

import BankingApp._BankingImplBase;
import BankingApp.*;
import java.util.ArrayList;
import java.util.Iterator;

public class BankingServant extends _BankingImplBase {
  private int AccountName;
  private int LodgementAmount ;
  private int TransferAmount ;
  private int WithdrawlAmount;
  private int TransferAmount;
  private int TransferAccWith;
  private int TransferAccDep;
  private int CheckBalance;

  private class Account {
    String accName;
  }

  private class Trans {
    String accName;
    double transferAmount;
    double transferAccWith;
    double transferAccDep;
    double withAmount;
    double lodgementAmount;
  }

  private class With {
    String accName;
    double withAmount;
  }

  public boolean Lodgement(String accName, double lodgementAmount) {
    System.out.println("Enter Lodgement.");
    Account acc = new Account();
    acc.accName = accName;
    acc.lodgementAmount = lodgementAmount;
    acc.add(acc);
    System.out.println("Money was lodged.");
  }

  public boolean Transfer(String accName, double transferAmount, double transferAccWith, double transferAccDep){
    System.out.println("Transfer Amount: ");
    Trans bankingTemp = new Trans();
    bankingTemp.accName = accName;
    bankingTemp.transferAmount = transferAmount;
    bankingTemp.transferAccWith = transferAccWith;
    bankingTemp.transferAccDep = transferAccDep;
    bankingTemp.parts = this.parts;
    bankingTemp.planeId = planeId;
    banking.add(bankingTemp);
    System.out.println("Transfered");
    planeId++;
    return true;
  }

  public void CheckBalance(String accName) {
    System.out.println("Balance is: ");
    Account accB = new Account();
    accB.accName = accName;
    accB.checkBalance = checkBalance;
    accB.add(accB);
    System.out.println("Balance is: ");
  }
}

Why am I getting this error?

Answer 1

You have

private int CheckBalance;

and

public void CheckBalance(String accName) {

There are two Java conventions you can follow to prevent things like this:

1. Always begin method and field names with a lowercase letter.
2. more important in this example Fields should be given noun names, methods should be given verb names, so they should almost never have the same name.

You can find some good references on naming conventions here:

• Java Code Naming Conventions
• Java Practices