//Bill class for TestBill
public class Bill {
  private String biller; //Person owed
  private String billAcct; //Account to be paid to
  private double billAmtDue; //Amount due
  private String billDueDate; //Due date
  private String billPaidDate; //the day bill was paid or null

  //values set to null default
  public Bill() {
    biller = null;
    billAcct = null;
    billAmtDue = 0.0;
    billDueDate = null;
    billPaidDate = null;
  }

  //Bill constructor, set values for variables
  public Bill(String owedTo, String owedFor, double owedAmt, String owedWhen, String owedPaidDate) {
    setBiller(owedTo);
    setBillAcct(owedFor);
    setBillAmtDue(owedAmt);
    setBillDueDate(owedWhen);
    setBillPaidDate(owedPaidDate);

  }

  //sets the Biller value
  public final void setBiller(String owedTo) {
    biller = owedTo;
  }

  //sets billAcct value
  public final void setBillAcct(String owedFor) {
    billAcct = owedFor;
  }

  //sets billAmtDue value
  public final void setBillAmtDue(double owedAmt) {
    billAmtDue = owedAmt;
  }

  //sets BillDueDate value
  public final void setBillDueDate(String owedWhen) {
    billDueDate = owedWhen;
  }

  //sets BillPaidDate value
  public final void setBillPaidDate(String owedPaidDate) {
    billPaidDate = owedPaidDate;
  }

  //returns biller
  public final String getBiller() {
    return biller;
  }

  //returns billAcct
  public final String getBillAcct() {
    return billAcct;
  }

  //returns billAmtDue
  public final double getBillAmtDue() {
    return billAmtDue;
  }

  //returns billDueDate
  public final String getBillDueDate() {
    return billDueDate;
  }

  //returns billPaidDate
  public final String getBillPaidDate() {
    return billPaidDate;
  }

  //returns string output w/ bill information and paid status
  public String toString() {
    String output = String.format(getBiller() +" is owed $"+ getBillAmtDue() + " on account "+ getBillAcct() +" by "+ getBillDueDate()+"\n");
    if(getBillPaidDate() == null) {
      output += "This bill has not yet been paid.";
    }
    else {
     output += "This bill was paid on "+ getBillPaidDate() +".";
    }
    return output+"\n";
  }
}