Unable To Differentiate Legal And Illegal Forward Reference
Mar 16, 2014
I understand that the following is an example of valid reference in java. I also understand that at class creation, first i and j are initialized to 0. j is then re-initialized to 5, as a result of which i's value is 0 and j's is 5 inside main.
class J
{
static int test() {
return j;
}
static int i = test();
[Code] ....
But why is the same not true for the following ? Why is it that i and j are not initialized to the default value of 0 in this case and gives an illegal forward reference?
class test
{
static int i = j;
static int j=5;
public static void main(String[] args) {
System.out.println(i);
System.out.println(j);
}
}
Why is it legal forward reference when using a method, and illegal when pretty much the same thing is done using a variable ?
Any Technique that will decide which one of the fields (Integer, Address, DOB, String, Float) are user defined type. (An outsider class should used that will identify the Java classes and the user-defined classes.)
I have to forward my request to another webApplication using post request parameters. In this case Webaplication-1 need send request using post request params to Webapplication-2 & once Webaaplication-2 receives request it has to process & display output.
For this have tried below 2 options which Servlet API provides.
1. RequestDispatcher : this will used to forward request to another resource within the application.
2. sendRedirect() : this method support doGet() of Servlet.
3. Using HttpClient, which is provided by Apache able to do but it will not displaying Output,It sending back response to Webapplication-1 .
Is there any option which will handover request from one webapplication to another webapplication.
I can't figure out how to complete the for loop for the forward method that needs to calculate each pixel on the path setting it to white, starting at location (x,y) and ending at r.
public class Turtle { private static BufferedImage img; private static int black = 0; private static int blue = 255; // 2^8-1 private static int green = 65280; //(2^8-1)*2^8 private static int red = 16711680; //(2^8-1)*2^16 private static int white = 16777215; // 2^24-1 private double x,y,theta; // what does a Turtle know? static // a static initializer list
I have a scenario here where the JSF lifecycle is not getting invoked. I have a filter, whose responsibility is to filter only authorized requests.the code of the filter is given below
now in the else block i am filtering the unauthorized requests, and sending them back to the Login.xhtml page of the application.The problem i am encountering here is that, the images and styles associated with the page are not getting loaded, what i am thinking is that when i am using redirect or forward, the FacesServlet is not getting called, and it is directly going to Login page i.e. no Lifecyle is being called.how to Filter the requests and at same time not lose the styles?
I have a scenario here where the JSF lifecycle is not getting invoked. I have a filter, whose responsibility is to filter only authorized requests. The code of the filter is given below
Now in the else block I am filtering the unauthorized requests, and sending them back to the Login.xhtml page of the application.
The problem I am encountering here is that, the images and styles associated with the page are not getting loaded, what i am thinking is that when i am using redirect or forward, the FacesServlet is not getting called, and it is directly going to Login page i.e. no Lifecyle is being called.
Am I right on this?, if so how to Filter the requests and at same time not lose the style?
List<Integer> list = new ArrayList<Integer>(); for (int i = 0; i < 5; i++) { list.add(i * 3); } ListIterator<Integer> listItr = list.listIterator(); System.out.println("Traversing in a forward direction");
[Code] ....
Output:--
Traversing in a forward direction 0 3 6 9 12 Traversing in a backward direction 12 9 6 3 0 425
Why 425 is not showing when we are traversing in a forward direction.
Problem is, the link invokes the doGet method of my servlet and the jsp:forward invokes the doPost. Is it possible to use jsp:forward and specify doGet somehow?
I am getting the error "Line 54, illegal start of expression". Line 54 is where my "for" starts. It was running ok earlier, now I can't get this error to go away?
Lines 7 , 10 ,13 .... All have a Illegal Start of Expression error.
[color=blue]private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { Random rd = new Random(); int random = 0; random=rd.nextInt(6)+1; switch(random){
why the complier is giving the following error message "illegal start of expression" once it reach the countSpaces method.The way I see it (and I am obviously seeing it wrong), the code is public since why not, int since it returns an int # and the method has return int in it, and static I am not too sure but I get the same error message whether or not it is included
public static void main (String args[]) { Scanner in = new Scanner(System.in); String sentence; System.out.println("type a sentence"); sentence = in.nextLine(); countSpaces (sentence);
I accidentally wrote a code differently than what I should've, and I got these errors :
"Illegal modifier for parameter a; only final is permitted" "Illegal modifier for parameter b; only final is permitted" "Illegal modifier for parameter c; only final is permitted"
The code that I wrote and gave these errors:
Java Code:
class Math { public static void main(String[] args) { static int a = 11; static int b = 35; static int c = 29; //the rest of the code below
[Code] ....
I noticed that I can declare "static int" only under "class Math" and not under "public static void main".(I had to remove "static" if declaring int under "public static void main");
Why does this not work? I get an ']' expected at the y in the fourth line of code and an illegal start of an expression at the actual ] in the same line
int y = 0; JTextField response[] = new JTextField[10]; while(y < 10) { JTextField response[y] = new JTextField(7); add(response[y]); response[y].addItemListener(this); ++y; }
I have a enum class which contains some string which i am comparing to a string i get from a user
Java Code:
public enum Compare { a, b, c, d, e, f } class SomeClass { String method(String letter){ Compare word= Compare.valueOf(letter); } } mh_sh_highlight_all('java');
Everything works fine but when I added a new word to it like "g" it throws the IllegalArgumentException ?
I am attempting to create a very simple game where two squares move around and each can see the other square moving. This is a multi-player game over a TCP network using JavaFX. I am getting an illegal state exception when I call requestFocus(). This is my server:
public class GameServer extends Application { ObjectOutputStream p1out; ObjectOutputStream p2out; int PLAYER1 = 1; int PLAYER2 = 2;
I'm working through Head First Java, and I'm struggling with the chapter 6 magnet exercise on page 161. I've checked my answer countless times, and it appears to match the book's code, but when I try to run it on my computer I'm getting an error. It says:
error: <identifier> expected System.out.println^(" "); and
error: illegal start of type System.out.println(^" ");, both for line 32.
I cannot seem to figure out what is different about my code!!
import java.util.*;
public class ArrayListMagnet { public static void main (String [] args) { ArrayList<String> a = new ArrayList<String>(); a.add (0, "zero"); a.add(1, "one"); a.add(2, "two"); a.add(3, "three");
[Code] .....
Also, I'm not sure if this has anything to do with the above errors, but I'm getting a third error message for line 34 saying:
Here is my program and results and I am having a error on line 38 which is "public static long fib01(long paramLong)" The program does give me my results but I am trying to correct there error.
public static void main(String[] args) { { System.out.print("
" + String.format("%-10s", new Object[] { "Index" })); System.out.print(String.format("%-15s", new Object[] { "Fibonacci01" })); System.out.print(String.format("%-15s", new Object[] { "Fibonacci02" })); System.out.println(String.format("%-15s", new Object[] { "Fibonacci01" }));
I'm working on a program and can't seem to fix my for loop error.I get an error at the for loop line saying illegal start of expression and i don't know how to fix it:
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */
I need to know why this program is giving me error (illegal start of expression). What must i do to stop the error?
//Read a character from keyboard class Kbin{ public static void main(String[]args){ throws java.io.IOException{ char ch;
System.out.print( " Press a key followed by ENTER: "); ch = (char) System.in.read();//read character from keyboard System.out.println( "Your key is: " + ch); } } }
