How to get Array elements
Folks
in my JSP i have a combo box where in user can select multiple values and in my Servlet i set them using a Serilizable object
public void setSites(String[] sites)
this.sites = sites;
and in my EJB i get them as
public String[] getSites()
return sites;
This is my query
select * from sites where site_id in ( " + @sites + ")",
So how do i pass this to my query as {a,b}
Any code help is appreciated
Thanks
mathew
String [] theSites = new String[2];
theSites[0] = a;
theSites[1] = b;
someObject.setSites(theSites);I don't know how you get a and b, but if you know how to get them from your query, you should be able to use the above to call setSites.
If that isn't what you want to know, please clarify your question.
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I am trying to modify array elements in a class which populates these fields by reading in a text file. I have got mutator methods to modify the array elements and they work fine in the same class.
public class Outlet {
private Outlet[] outlet;
private String outletName;
private int phoneNumber;
private int category;
private int operatingDays;
static final int DEFAULT = 99;
public void setPhoneNumber(int newPhoneNumber) {
phoneNumber = newPhoneNumber;
public void setCategory(int newCategory) {
category = newCategory;
public void setOperatingDays(int newOperatingDays) {
operatingDays = newOperatingDays;
public static void readFile(Outlet[] outlet) throws FileNotFoundException {
Scanner inFile = new Scanner(new FileReader("outlets.txt"));
int rowNo = 0;
int i = 0;
String outletValue;
while (inFile.hasNext() && rowNo < MAXOUTLETS) {
outlet[rowNo] = new Outlet();
outletValue = inFile.nextLine();
outlet[rowNo].setOutletName(outletValue.toUpperCase());
outlet[rowNo].setPhoneNumber(DEFAULT);
outlet[rowNo].setCategory(DEFAULT);
outlet[rowNo].setOperatingDays(DEFAULT);
inFile.close();
public static void displayUnassignedOutlets(Outlet[] outlet) {
int i = 0;
System.out.println("Showing all unassigned Outlets");
System.out.println(STARS);
for (i = 0; i < MAXOUTLETS; i++ ) {
if (outlet.getCategory() == DEFAULT) {
System.out.println("\nOutlet Number: " + (i + 1) + "\t" +
outlet[i].getOutletName());
Now in the other class that I want to modify the array elements I use the following code but I get an error that "The expression type must be an array but a Class ' Outlet' is resolved".
So how can I modify the array elements? What do I have to instantiate to get the following code to work?
public class Franchise {
private Franchise[] franchise;
public Outlet[] outlet;
public static void createFranchise(Franchise[] franchise) throws FileNotFoundException {
Scanner console = new Scanner(System.in);
int choice = -1;
++++++++++++++++++++++++++++++++++++
Outlet outlet = new Outlet();
Outlet.readFile(outlet.getOutlet());
++++++++++++++++++++++++++++++++++++
boolean invalidChoice = true;
while (invalidChoice) {
System.out.println("\nCreating a New Franchise...");
System.out.println(STARS);
System.out.println("Please select an outlet from the list below");
Outlet.displayUnassignedOutlets(outlet.getOutlet());
choice = console.nextInt();
if (choice < 0 || choice > 10) {
System.out.println("Error! Please choose a single number between 1 and 10");
else {
invalidChoice = false;
invalidChoice = true;
while (invalidChoice) {
System.out.println("Please enter the Phone Number for this Outlet");
choice = console.nextInt();
String phone = new String();
phone = new Integer(choice).toString();
if (phone.length() < 8 || phone.length() > 10) {
System.out.println("Error! Please enter 8 to 10 digits only");
else {
+++++++++++++++++++++++++++++++++++++++
outlet[(choice - 1)].setPhoneNumber(choice);
+++++++++++++++++++++++++++++++++++++++
invalidChoice = false;Hi Pete!
Thanks for your comments. I have included my full classes below with their respective driver modules. Hope this helps out a bit more using the code tags. Sorry, it was my first posting. Thanks for the heads up!
import java.util.*;
import java.io.*;
public class Outlet {
public Outlet[] outlet;
private String outletName;
private int phoneNumber;
private int category;
private int operatingDays;
// private Applicant chosenApplicant;
static boolean SHOWDETAILS = false;
static final String STARS = "****************************************";
static final int MAXOUTLETS = 10;
static final int DEFAULT = 99;
public Outlet[] getOutlet() {
return outlet;
public String getOutletName() {
return outletName;
public int getPhoneNumber() {
return phoneNumber;
public int getCategory() {
return category;
public int getOperatingDays() {
return operatingDays;
public void setOutletName(String newOutletName) {
outletName = newOutletName;
public void setPhoneNumber(int newPhoneNumber) {
phoneNumber = newPhoneNumber;
public void setCategory(int newCategory) {
category = newCategory;
public void setOperatingDays(int newOperatingDays) {
operatingDays = newOperatingDays;
public Outlet() {
outlet = new Outlet[10];
public static void readFile(Outlet[] outlet) throws FileNotFoundException {
Scanner inFile = new Scanner(new FileReader("outlets.txt"));
int rowNo = 0;
int i = 0;
String outletValue;
while (inFile.hasNext() && rowNo < MAXOUTLETS) {
outlet[rowNo] = new Outlet();
outletValue = inFile.nextLine();
outlet[rowNo].setOutletName(outletValue.toUpperCase());
//System.out.println(rowNo % 2);
// if (rowNo % 2 == 0) {
outlet[rowNo].setPhoneNumber(DEFAULT);
outlet[rowNo].setCategory(DEFAULT);
outlet[rowNo].setOperatingDays(DEFAULT);
// System.out.println("Outlet Name+++++++ " + rowNo + "\n" + outlet[rowNo].getOutlet());
rowNo++;
// System.out.println(rowNo);
if (SHOWDETAILS) {
if (rowNo > 6) {
for (i = 0; i < rowNo; i++ ) {
System.out.println("\nOutlet Name+++++++ " + (i + 1) + "\t" +
outlet.getOutletName());
inFile.close();
public static void displayAllOutlets(Outlet[] outlet) {
int i = 0;
System.out.println("Showing All Outlets");
System.out.println(STARS);
for (i = 0; i < MAXOUTLETS; i++ ) {
System.out.println("\nOutlet Number: " + (i + 1) + "\t" +
outlet[i].getOutletName());
public static void displayUnassignedOutlets(Outlet[] outlet) {
int i = 0;
System.out.println("Showing all unassigned Outlets");
System.out.println(STARS);
for (i = 0; i < MAXOUTLETS; i++ ) {
if (outlet[i].getCategory() == DEFAULT) {
System.out.println("\nOutlet Number: " + (i + 1) + "\t" +
outlet[i].getOutletName());
public static void main(String[] args) throws FileNotFoundException {
Outlet start = new Outlet();
Outlet.readFile(start.getOutlet());
Outlet.displayUnassignedOutlets(start.getOutlet());
================================
So in the below Franchise class, when I specify:
outlet[(choice - 1)].setPhoneNumber(choice);
I get the error that an array is required but the class Outlet is resolved. Any feedback is greatly appreciated!
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.*;
public class Franchise {
private Franchise[] franchise;
public Outlet[] outlet;
static final int MAXOUTLETS = 10;
static final int DEFAULT = 99;
static boolean SHOWDETAILS = false;
static final String STARS = "****************************************";
static final double REGHOTDOG = 2.50;
static final double LARGEHOTDOG = 4;
static final int SALESPERIOD = 28;
static final int OPERATINGHOURS = 8;
public Franchise[] getFranchise() {
return franchise;
public Franchise() {
public static void createFranchise(Franchise[] franchise) throws FileNotFoundException {
Scanner console = new Scanner(System.in);
int choice = -1;
//franchise[i] = new Franchise();
Outlet outlet = new Outlet();
//outlet[i] = new Franchise();
Outlet[] myOutlet = new Outlet[10];
Outlet.readFile(outlet.getOutlet());
boolean invalidChoice = true;
while (invalidChoice) {
System.out.println("\nCreating a New Franchise...");
System.out.println(STARS);
System.out.println("Please select an outlet from the list below");
Outlet.displayUnassignedOutlets(outlet.getOutlet());
choice = console.nextInt();
if (choice < 0 || choice > 10) {
System.out.println("Error! Please choose a single number between 1 and 10");
else {
invalidChoice = false;
//System.out.println(j);
invalidChoice = true;
while (invalidChoice) {
System.out.println("Please enter the Phone Number for this Outlet");
choice = console.nextInt();
String phone = new String();
phone = new Integer(choice).toString();
if (phone.length() < 8 || phone.length() > 10) {
System.out.println("Error! Please enter 8 to 10 digits only");
else {
outlet[(choice - 1)].setPhoneNumber(choice);
invalidChoice = false;
invalidChoice = true;
while (invalidChoice) {
System.out.println("Please enter the category number for this Outlet");
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if (choice < 1 || choice > 4) {
System.out.println("Error! Please choose a single number between 1 and 4");
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outlet.setCategory(choice);
invalidChoice = false;
invalidChoice = true;
while (invalidChoice) {
System.out.println("Please enter the Operating Days for this Outlet");
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if (choice < 5 || choice > 7) {
System.out.println("Error! Please choose a single number between 5 and 7");
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outlet.setOperatingDays(choice);
invalidChoice = false;
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//Applicant.checkCriteria(chosenApplicant.getApplicant());
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// chosenApplicant.displayOneEligibleApplicant());
Outlet.displayUnassignedOutlets(outlet.getOutlet());
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Franchise start = new Franchise();
Franchise.testing(start.getFranchise());
//Franchise.createFranchise(start.getFranchise());
//Franchise.displaySalesForcast();
//Franchise.displayAllFranchises(start.getOutlet()); -
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