program compiles and runs, but no output shown on screen

[buer Jiang]

import java.util.*; // apply java library
import java.io.*; // apply various kind of java input output package
import java.text.NumberFormat;
import java.io.FileNotFoundException;


 interface Account {

String SAVING_ACCOUNT_TYPE = "S";

String CHECKING_ACCOUNT_TYPE = "C";

String BUSINESS_ACCOUNT_TYPE = "B";

void setName(String name);

void setAccountNo(String accountNo);

void setBalance(double balance);

void setSsn(String ssn);

void setPhoneNo(String phoneNo);

double caluculateInterest();

void issueStatement();



}

class SavingsAccount implements Account {
static final double INTEREST_RATE_LESS_THAN_5K = 0.04;
static final double INTEREST_RATE_OTHERWISE = 0.05;
private String name;
private String accountNo;
private double balance;
private String phoneNo;
private String ssn;

public void setName(String name) {
this.name = name;
}

public void setAccountNo(String accountNo) {
this.accountNo = accountNo;
}

public void setBalance(double balance) {
this.balance = balance;
}

public void setPhoneNo(String phoneNo) {
this.phoneNo = phoneNo;
}

public void setSsn(String ssn) {
this.ssn = ssn;
}

@Override
public double caluculateInterest() {
double interest = 0;
if(balance<5000){
interest = balance*INTEREST_RATE_LESS_THAN_5K;
}
else
interest = balance*INTEREST_RATE_OTHERWISE;
return interest;
}

@Override
public void issueStatement() {
NumberFormat currency = NumberFormat.getCurrencyInstance(Locale.US);
System.out.println("Statement for Saving Account No: "+accountNo);
System.out.println("---------------------------------------------");
System.out.println("Name: "+name);
System.out.println("SSN: "+ssn);
System.out.println("Account No: "+accountNo);
System.out.println("Phone No: "+phoneNo);
System.out.println("Open Balance: "+currency.format(balance));
System.out.println("Close Balance: "+currency.format(balance+caluculateInterest()));
System.out.println("----------------------------------------------");
}

}




 class CheckingAccount implements Account{

static final double INTEREST_RATE = 0.025;
private String name;
private String accountNo;
private double balance;
private String phoneNo;
private String ssn;

public void setName(String name) {
this.name = name;
}


public void setAccountNo(String accountNo) {
this.accountNo = accountNo;
}


public void setBalance(double balance) {
this.balance = balance;
}


public void setPhoneNo(String phoneNo) {
this.phoneNo = phoneNo;
}


public void setSsn(String ssn) {
this.ssn = ssn;
}


@Override
public double caluculateInterest() {
double interest = this.balance*INTEREST_RATE;
return interest;
}


@Override
public void issueStatement() {
NumberFormat currency = NumberFormat.getCurrencyInstance(Locale.US);
System.out.println("Statement for Checking Account No: "+accountNo);
System.out.println("---------------------------------------------");
System.out.println("Name: "+name);
System.out.println("SSN: "+ssn);
System.out.println("Account No: "+accountNo);
System.out.println("Phone No: "+phoneNo);
System.out.println("Open Balance: "+currency.format(balance));
System.out.println("Close Balance: "+currency.format(balance+caluculateInterest()));
System.out.println("----------------------------------------------");
}

}

 class BusinessAccount implements Account{

private String name;
private String accountNo;
private double balance;
private String phoneNo;
private String ssn;

public void setName(String name) {
this.name = name;
}

public void setAccountNo(String accountNo) {
this.accountNo = accountNo;
}

public void setBalance(double balance) {
this.balance = balance;
}

public void setPhoneNo(String phoneNo) {
this.phoneNo = phoneNo;
}

public void setSsn(String ssn) {
this.ssn = ssn;
}

@Override
public double caluculateInterest() {

return 0; // since no interest for bussiness accounts

}

@Override
public void issueStatement() {
NumberFormat currency = NumberFormat.getCurrencyInstance(Locale.US);

System.out.println("Statement for Business Account No: "+accountNo);
System.out.println("---------------------------------------------");
System.out.println("Name: "+name);
System.out.println("SSN: "+ssn);
System.out.println("Account No: "+accountNo);
System.out.println("Phone No: "+phoneNo);
System.out.println("Open Balance: "+currency.format(balance));
System.out.println("Close Balance: "+currency.format(balance+caluculateInterest()));
System.out.println("----------------------------------------------");

}
}



public class Project4 {
    public static void main(String[] args)  throws NullPointerException ,FileNotFoundException
	{  BusinessAccount b = new BusinessAccount();
            CheckingAccount c = new CheckingAccount();
            SavingsAccount s = new SavingsAccount();
File file = new File("account.txt");
// Since first line is just header, we have to skip that.
//so we will just invoke that line and won't use it.
    Scanner fileReader = new Scanner(file);
     
    
        // Since first line is just header, we have to skip that.
//so we will just invoke that line and won't use it.
        String header = fileReader.nextLine();
        while(fileReader.hasNextLine()){
          //  Account account = null;
            String line = fileReader.nextLine();
//Split the line over " " (space) delimeter.
            String[] data = line.split(" ");
           
            if(data[5].equals(Account.BUSINESS_ACCOUNT_TYPE)){
            
            b.setName(data[0]);
            b.setAccountNo(data[1]);
            b.setPhoneNo(data[2]);
            b.setSsn(data[3]);
            b.setBalance(Double.parseDouble(data[4])); // since split will give an array of string, it needs to be converted
            b.issueStatement();
            }
            else if(data[5].equals(Account.CHECKING_ACCOUNT_TYPE)){
            
            c.setName(data[0]);
            c.setAccountNo(data[1]);
            c.setPhoneNo(data[2]);
            c.setSsn(data[3]);
            c.setBalance(Double.parseDouble(data[4])); // since split will give an array of string, it needs to be converted
            c.issueStatement();
            }
            else if(data[5].equals(Account.SAVING_ACCOUNT_TYPE)){
           
            s.setName(data[0]);
            s.setAccountNo(data[1]);
            s.setPhoneNo(data[2]);
            s.setSsn(data[3]);
            s.setBalance(Double.parseDouble(data[4])); // since split will give an array of string, it needs to be converted
            s.issueStatement();
            }
            
           
            
            // issue the statement
        }
       
        fileReader.close(); // closing the reader stream
       
    }
}

[Winston Gutkowski]

Hi buer, and welcome to Java Ranch.

1. When you post code, please UseCodeTags (←click). I've added them for you this time, but your indenting still isn't correct, so you might want to edit your post (just use the 'Edit' button, and before you save your changes, use the 'Preview' button to see if it looks OK).
2. I'm not quite sure what you want us to do. That's an awful lot of code.

Winston

[Jesper de Jong]

The program will read data from a file named accounts.txt and then print information on what it found in the file.

Do you have a file accounts.txt? Does it contain data in the format that the program expects?

[Campbell Ritchie]

You also have much repeated code. I think you might do well to think of an abstract class to hold that repeated code.