I was send the id through url like this code.
<td> <%=rs3.getString("Project")%> </td> <td> <a href="TaskAssignment.jsp?id=<%=rs3.getString("id")%>"> <input type="button" name="edit" value="Edit"></a></td>
i have problem to getting this id in servlet.
Servlet:
String id=request.getParameter("id");
the variable id getting only null
I'm trying to pass a parmeter to a jsf page from a servlet(i.e. associated with paypal adaptive api), but I keep getting the following error, even though the productType on ProductDetailsVO is a String.
INFO: WARNING: FacesMessage(s) have been enqueued, but may not have been displayed.
sourceId=j_idt2[severity=(ERROR 2), summary=(j_idt2: '45;productType=Sport'
must be a number consisting of one or more digits.), detail=(j_idt2: '45;productType=Sport' must be a number between -2147483648 and 2147483647 Example: 9346)]
Calling JSF page contains:-
returnURL = new URL(new URL(request.getRequestURL().toString()),"pages/paypalpaymentapproved.xhtml?paypalID="+paypalID+";productType=Sport");
response.sendRedirect(returnURL.toString());
[Code] ....
currently I am doing my java web application project ,and it has following steps 1) Upload the txt files 2) java servlet gets the txt file's url , read the data and do the calculation 3) pass the results
I almost finished the second step , and working on the first step .Since there are so many input files at a given time , i have to use drag and drop method to get the file's location.how to pass file's path to servlet.( servlet code can read the data from the given txt file path )software used - tomcat and netbeans 8.0
I am a beginner want to compile servlet with following path
javac -classpath Program FilesApache Software FoundationTomcat 5.5commonlibservlet-api.jar;classes:.-d classes srccomexamplewebBeerSelect.java
Problem arises as follows:
javac: invalid flag: FilesApache
Usage: javac <options> <source files>
use -help for a list of possible options
I am trying to pass value from class to another using net beans but it seems that I am doing something wrong.
find my basic code at sourceforge.net/projects/val1toval2/files/SRC/
I would like to have both VAL1 and VAL2 having same value in Jlabel.
//Main.java
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
Second SEC = new Second();
l_dis.setText(String.valueOf(getInput()));
l_tot.setText(String.valueOf(SEC.getTotal()));
[code]...
I am having a problem passing an int value from one class to the other. The gist of the objective of this program is to compute a local sum at each client, and then once the local sums are computed.. to compute the overall sum from all the clients. My problem is that I'm having trouble figuring out how to pass each sum from each individual client in the class multicastSenderReceiver to the readThread class. I keep getting an error.
I feel that I have to be able to pass the sum value from each client generated in multicastSenderReceiver to the other class, because that is the only way I'll accurately be able to sum up all the values..
Java Code:
package multicastsenderreceiver;
import java.net.*;
import java.io.*;
import java.util.*;
//import static multicastsenderreceiver.multicastSenderReceiver.numProcesses;
class multicastSenderReceiver{
[code]....
I'm using Java in BlueJ where I'm trying to write a class to store cycling club membership details in a map. I'm trying to pass a map as a parameter to a function that will iterate over the map and print out the member details. My code is:
public class CtcMembers
{
//instance variables
private Map<String, Set<String>> memberMap;
/**
* Constructor for objects of class CtcMembers
[Code] ....
When I execute the following in the OU workspace:
CtcMembers c = new CtcMembers();
c.addCyclists();
I can see a map populated with the expected details.
When I execute the following in the OU workspace:
c.printMap(c.getMap());
I get the following error:
java.lang.ClassCastException: java.util.HashSet cannot be cast to java.lang.String
in CtcMembers.printMap(CtcMembers.java:81)
in (OUWorkspace:1)
I wasn't aware I was trying to cast anything so this has got me baffled.
This is my first time working with C++ and I have put together this program and came up with two errors and I am unsure what it is wanting me to do. The errors I got are:
1>c:usersownerdocumentsvisual studio 2010projectsweek5week5passing_by_value.cpp(30): error C2064: term does not evaluate to a function taking 1 arguments
1>c:usersownerdocumentsvisual studio 2010projectsweek5week5passing_by_value.cpp(38): error C2064: term does not evaluate to a function taking 1 arguments
#include<iostream>
using std::cin;
using std::cout;
using std::endl;
//initialize arrays
int incr10(int* numa,int* numb);
[Code] ....
Does the following code pass a value into a method?
/code
lnValue[x][y] = computelnValue();
I enter a value in the text box in one class and want to pass that value to another class in order to compare it and color the cell in a table. In the first class I have
package cege.ui;
import cege.controller.HtmlController;
import cege.controller.ScreenCaptureController;
...
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
[Code] .....
How to pass the threshhold from the first to the second class?
I have a java application in which when starting it a map is opened and a screen is captured. The capturing is in certain time interval. I want to enable the user to change the interval for the automatic capturing the map. I placed a text box in a JPanel. I want to pass the value which was entered in it to the html page which opens a Google map. Since I am new in java programming, I found that I can do it by using applets. I made an applet, and tried to call it in the html file. But now instead of opening the map file in a browser, it opens very quickly only black window.
Here is my applet:
package cege.ui;
import java.applet.Applet;
import java.io.IOException;
import cege.ui.GuiMain;
public class AppletTInterval extends Applet {
private int TimeInterval=0;
[Code] .....
And the code in the html file where I try to call the applet, i.e. to pass the value which is returned by the applet is:
<script src=
<!--"https://www.java.com/js/deployJava.js"></script>
<script>
var attributes = { id:'AppletTInterval',
code:'cege.ui.AppletTInterval', width:1, height:1} ;
var parameters = { jnlp_href: 'AppletTInterval.jnlp'} ;
[Code] .....
Can I use this way to pass a value from the java class file (from the JTextField into the html file?
I am trying to pass the values for UPPER_BOUND and LOWER_BOUND from the main method into the getValidNumber method. However, I'm not sure how to do this. The rest of the code is correct as far as I know, I just need to get the values for the bounds into the getValidNumber method. How would I do this? the notes in the main method explain what I need to do.
public static void main(String[] args) throws FileNotFoundException {
Scanner kb = new Scanner (System.in);
final double LOWER_BOUND = 0;
final double UPPER_BOUND = 100;
//Call the getValidNumber method, passing it the values LOWER_BOUND and UPPER_BOUND.
//Take the returned value and store it in a variable called num.
//Print out the value of num (here in the main method)
[Code] .....
i want to pass an object of type Software to assign it to a computer from Computer class...
i should note that computer and software are arrays of objects thats the variable and method to set software in Computer class
private Software[] software;
public void setSoftware(Software software,int index){
this.software[index]=software;}
note: the user choses the a computer from a list and a software as will
for example the program will show the user 2 computers
0 for computer: apple, Model: mac mini, Speed: 2.8
1 for computer: sony, Model: vaio, Speed: 2.2
the user enters the index he wants then the program will show a list of software to add to the computer selected
the error I'm having is run time error Exception in thread "main" java.lang.NullPointerException and it points to these 2 lines
1.comp[Cch].setSoftware(software,Sch);
2. the method setSoftware
every thing is running correctly but this step above
Cch= the chosen computer index
Sch= the chosen Software index
why am i getting an error and how to fix it?
It just wont work... Everytime I try to pass a variable into a class it sets it to 0. What to do.
The variable should be '2', but it prints out as 0!?
Java Code: package Zoo;
import java.util.Random;
public class Animal {
Random random = new Random();
public void Eat(){
System.out.println("The animal starts to eat.");
[Code]...
The method bash, needs the variable 'playerTwo' to be 2, to carry on. But it prints out 0.
Int the animal constructor, I passed in the variable from another class, and it prints out 2 in the constructor like it should. But outside of the constructor it is equal to 0.
I am trying to get the username and password for one class and send them to another. However I cannot send them in the constructor because a database class is getting them and I need that constructor blank. However if I do not pass the class in the constructor I get a NULL error, even better when I do pass it in I seem to get a thread lock. I do try to do my own housekeeping and close the one frame before I open a new one but it doesn't work. I will do my best to show the design of the program.
program starts
Java Code: public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
// connects to database and generates a GUI
new UserPromptScreen();
[code]....
I have to pass in UserPromptScreen in for it to work. This will cause me issues later with my design.
In my JSF application user starts on primary server where the session begins and then the user is redirected to a different server using sendRedirect. I want to pass some authentication token to the next server from primary server. I am trying to set session attribute as:
request.getSession().setAttribute("auth_token", "1");
And then send it to the next server as:
response.sendRedirect(encodedUrl);
But this attribute is not reaching the new server. I cannot pass this auth_token as request parameter as that wont be secure. So how to get some session data to new server?
I'm supposed to write a program that reads in 20 numbers stores them into a one dimensional array and then create a method that will calculate the average of the numbers in a separate method.
I've written a for loop in the main method that will take in the numbers but now I need to know how I can pass those values to a method that will calculate the average.
public class ConstructorHomework {
private static double average; //Declaring the Global Variable
//This Method Calculates The Average
public void avg(int x){
average = x/20;
[Code] .....
This is the main method an it contains the for loop that will take in 20 numbers
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
final int size = 20;
double[] array = new double[size];
for (int i = 0; i < array.length; i++){
array[i] = input.nextDouble();
}
//
Here I was trying to create and object and use it to pass value to the method
ConstructorHomework a = new ConstructorHomework();
a.avg(); //Problem is that I don't know what to put in the brackets
a.showNum();
}
}
you will be making four variables (2 primitive integers and 2 Account Objects). You will be following the steps detailed below. The challenge is to understand exactly what is happening and why. Start by coding the following two methods in a java file.
Start your main method with four variables: a, b c, d. a and by should be integer data, set them to be the values 10 and 20 respectively. Variables c and d should be Account Objects. The first account © is Ted, has $70,000 as his balance. The second account (d) is Joe, he has only $15,000 as his balance. Their account numbers are up to you to determine.Next, please print out the four variables: a, b, c, and d. Make sure that you label which ones are which. After you print these variables, please pass all four variables to a static method that you will create below. After you finish the method, please print out the four variables again: a, b, c, and d. Just as they were printed before the method.
Static methods: This method can be called whatever you want, however it will be public, static, and void. This method should take in four parameters: w and x which will be integers, then y and z which will be Account Objects.The first thing this method should do is to print out the four variables w, x, y, and z. This should be done in the same manner as you did in the main method. Next, change the first variable (w) to 15. After that, ted bought a new car. He now has only $20,000 in his account. Change the balance of y to be 20,000. Step three is to make a new Account Object named John, he has a balance of $10,000. Assign him to the variable z. Lastly, print all four variables again: w, x, y, and z.
I am trying to call stringToFile in the main method but it throws error saying "incompatible types scanner cannot be converted to string."
public static void main(String[] args) {
Scanner keyboard = new Scanner (System.in);
mask(keyboard);
printingString();
fileName(keyboard);
String completeFileName = stringToFile(keyboard);
[Code] ....
Whether I pass primitives or objects the original value does not change. Is this expected result?
Java Code:
public class Class {
public static void main(String args[]) {
int x=3;
doItPrim(x);
System.out.println(x);//3
Integer i=new Integer(3);
[Code] ......
I know in C++ It's possible to pass by reference but what about java?
For example, can i pass the address of a health variable into a Ninja class and then
Since Ninja inherits from an enemy class pass the health into the enemy class and within there have a function that returns that same health address and takes 5 from the health returning 95.
Can we pass more than one array in a method?
View Replies View RelatedWe are learning about how to pass objects into constructors. In our class, we made this following code:
public class InventoryItem {
//fields
private String description;
private int units;
//Add New constructor
public InventoryItem(InventoryItem some_object) {
description=some_object.description;
[Code] .....
As you can see the object of the same class is passed as the argument. Inside the constructor, our teacher did
some_object.description
This constructor, from my understanding, copies the description field and unit field to an object to the new object of class. Meanwhile, here is the demo class.
public static void main(String[] args)
{
//Create object
InventoryItem item1;
item1=new InventoryItem("hammer",20);
System.out.println("Item 1: ");
[Code] .....
Over here, my teacher uses :
.getDescription
My problem is that in the constructor of the first class I showed, why didn't he use
.getDescription
method instead of this
.description
May I know what is difference between these two. If I use .getdescription that would return the value of a field from that object too.
Using Eclipse. I have this line of code:
BufferedReader br = new BufferedReader(new InputStreamReader(in));
I want to do something with br in a method that I defined. But Eclipse is complaining about br declared as
public static void Get_Next(String next_line, BufferedReader br) {
How do I make this work?
I'm asking if there is a way to pass parameter between try/catch block.
I have a method:
public void invia(OiStorto invioaca) throws Exception {
Long id=0L;
try {
//some code
for (VElenpere elenpere : elenperes) {
[Code] ...
The method called in the for:
private void popolaScompiute(Long anno, InviaEOI inviaEOI0, _4IntegerType param, ElOpeIncType opereIncompiute,
VElencoOpere elencoOpere,Long id) {
try {
//some code
for (OiOpera opere : oiOpere){
[Code] ....
And finally the method in which the error can occur (the method poputa is called for every id)
private void poputa(ElOpeIncType opereIncompiute, OpeIncType operaSingola, OiOpera opere) {
try {
//some code
} catch (NullPointerException e) {
e.printStackTrace();
//return id;
}
So method invia call the method popolaScompiute, inside popolaScompiute there is an iteration through some id and for some id can occur an error; what i want is the getting the value of id in the first method invia, using the block try/catch. Is there a way to accomplish this?
I am new to JSF and was trying to find an example.
My question is in the processPage() method... how do i pass the managed bean to the ProjectDAO insert statement?
Faces-config.xml
<managed-bean>
<managed-bean-name>projectBean_backing</managed-bean-name>
<managed-bean-class>com.att.ped.backing.Project</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
[Code] .....