Since I done a recent git pull on my project, for some reason now Im getting an error when starting Tomcat and rendering the index.jsp, but I dont understand whats changed, as this was working before.
The error:
org.apache.jasper.JasperException: /index.jsp (line: 4, column: 42) File "/blog.postTags" not found
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:42)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:443)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:133)
org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:168)
org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:410)
org.apache.jasper.compiler.Parser.parseDirective(Parser.java:475)
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1427)
I really am unsure as to why this has stopped working, I even rolled back to an earlier commit and this was definitely working before, but I havent changed anything, Initially when you start Tomcat is shows another error in the browser, but on a refresh its a null on this tag library?
I am creating a webapp project , in which i have loaded my JSP page having JSTL tags in a DIV tag successfully but when user clicks on a radio button a jquery fires which loads that perticular div tag , and the html content in that div tag is then loaded again but not the JSTL content..
I am creating a shopping list, with each element and object called product from the Item attribute class. Each product object has a description, price, and priority. From user input, I am able to create each product object, and then .add to my arraylist. I know that it successfully adds because I have it printed in each iteration of the do-while loop. Once the user indicates they want to quit, the loop ends. I then want to print each description, price, and quantity but this for loop will only print the last element over and over. Here is what I have:
ArrayList <ItemAttribute> list = new ArrayList<ItemAttribute>(); Scanner keyboard = new Scanner(System.in); ItemAttribute product = new ItemAttribute(); public void findDescrPrice() { /** * Get the item name (description) for each list item
I have one Project -"A".Inside of that I use, .XLS to read data.
Structure - A/src/TestData Inside of the TesetData - I have placed XLS files.
I have main method in TestDriver class.If I run this in Eclipse, running fine.But after exported to executable/runnable Jar, and ran via command line (command - jar -jar myjar.jar), I see issue: "Exception in thread "main" java.io.FileNotFoundException: srcTestDataTestCaseController.xls"
We have a webservices application that uses Java 1.6.0_43, Spring 3.2.3, CXF 2.6.9 and deployed to Jboss 5.0.1 GA in a LINUX x86_64 centos box. It essentially uses apache httpclient (4.2.2) to call internal services and returns the results back to customers. The application has been running fine for a year or so until early this month when all of sudden, it loaded about 300K classes in a very short time during our regression tests and saturated the CPU usage ever since. Hence the application is no longer responding.
I have been trying to troubleshoot the problem for a while. Tried visualvm, dynatrace. thread dumps. heap dumps... None of them is very effective in capturing what are the classes that are loaded so many times and what path triggered that.
One of my friend asked me that which will load first static variable or static block ? My answer was to static variable.. So he gave me two program and said to differentiate between them
1st program
public class Test { public static void main(String args[]) { System.out.println(Test.x); } static { System.out.println(Test.x);
[Code] ....
Output of this :
90 90
I tried to decompile the byte code and found it's same for both the above equation. How to differentiate between them. I am confused when the static variable will initialised.
so i followed a tutorial on youtube called "Java Game Development with Slick" - by thenewboston,URL....okay, so i have made my game / program, and now i just want to export it to a jar file that people can double click and play..unfortunately when i double click the .jar file nothing happens...i get the little "loading" thingy on my courser but it disappears after about 5 seconds and then nothing happens :(the way i made it into a jar file is by doing the following:
-right clicked my java project.. -clicked on "export".. -clicked on java / Runnable JAR file -filled in the stuff, (JARs destination ect..) -pressed finish.. -then i got a jar file on my desktop and double clicked it....but as i said....nothing happens
Write a program that asks the user for the low and high integer in a range of integers. The program then asks the user for integers to be added up. The program computes two sums:
The sum of integers that are in the range (inclusive), and the sum of integers that are outside of the range. The user signals the end of input with a 0.
Your output should look like this:
Sample input/output
In-range Adder Low end of range: 20 High end of range: 50 Enter data: 21 Enter data: 60 Enter data: 49 Enter data: 30 Enter data: 91 Enter data: 0 Sum of in range values: 100 Sum of out of range values: 151
This is my assignment and below is my code.
import java.util.Scanner; class InRangeAdder { public static void main(String[] args) { Scanner scan = new Scanner (System.in); int low, high, data=1, rangesum=0, outrangesum=0;
[Code] ....
The problem is that the program simply gives an output of 0 for both "rangesum" and "outrangesum". I don't quite understand why that is. Also i have a quick question, the program needs me to end the program when the value of data is 0 but in order to initialize it I need to give it a value. Usually I would give it a value of 0 like I have for rangesum and outrangesum but if I do the program does not run till the loop as it considers the value of data to be 0 and ends the program right away. What would be a work around to this and when do I need to have a value to initialize an integer? for example, I do not need a value for low and high. Is this because the program recognizes that a value is going to be defined but cannot do that for the other integers as they are inside a loop?
both will in theory never go in more interestingly this will compile
for(;false == false;){}
To me it seems like this is a parsing issue that could have been solved by the people who originally wrote the parser but they made a decision that there must be a relational operator in the condition declaration.
I'm trying to open an image within a JFrame but the image doesn't show. The directory path is correct. The JFrame opens perfectly but no image is showing.
JFrame frame = new JFrame("IMAGE"); frame.setSize(500,500); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); ImageIcon image = new ImageIcon("images/main.jpg"); JLabel label = new JLabel("", image, JLabel.CENTER); JPanel panel = new JPanel(new BorderLayout()); panel.add( label, BorderLayout.CENTER ); frame.setVisible(true);
In fact, I'm not yet past that "Hello World" program.I'm following the steps in "Head First: Java" book, and reached that point where one is ready to write his/her 1st Java code. Here's mine:
public class MyFirstApp { public static void main (String[] args) { System.out.println("I Rule!"); System.out.println("The World!"); }
}
As simple as it should be, and compiles fine producing the correspondent class. But it doesn't run, however, and spits the following execution-time errors:
Exception in thread "main" java.lang.UnsupportedClassVersionError: MyFirstApp : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:643) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
Is there a short term that means: "using an object reference with the datatype of a supertype to refer to an object with the datatype of a subtype"?
Saying "polymorphic reference" doesn't seem to be specific enough because ALL references other than those with the Object datatype are polymorphic. I saw one post that referred to these reference variables as a "supertype reference." In the absence of any other (more official) term, I may just use that term because calling a reference a "supertype reference" implies that there is a subtype. It sure beats what I was thinking about using: "sub-as-super." Which, when the inevitable mispronunciations occur, would lead to all kinds of off-color jokes.
Is there an "official" term that all of the dozens of Java books I have read seem to have missed? Or does everyone stumble along, spelling things out with a nearly sentence-long phrase.
Barbara is opening a book store, and she needs an effective, efficient, object-oriented program to keep track of her inventory. Barbara would like to maintain the following information about the books she sells: title, author, price, number in stock, and category. She categorizes her books into fiction, nonfiction and children’s books, because she has a separate room in her store for each category. Each book also needs an inventory number, and Barbara would like these numbers to start with 1000. She also needs to be able to keep track of the total number of books in inventory.
Barbara often facilitate her customers find books, and the program needs search capabilities to do this. Keeping an accurate inventory count of each book in stock is critical; both for accounting purposes and so she will know when to reorder. Barbara expects to have at most 2,000 differet books in her store.Barbara is very organized, and would like a nice menu, from which she can make choices that will enable her to do the following:
Add a new book to inventory This adds a new Book object (title, author, etc) into inventory It does not increase the number in stock of an existing book Search by title Search by author Search by inventory number Search by category Print out all info for all books This is the only output that should be on the command line
Please hard code the following book info into your program, so Barbara has some test data avaiable to test your program:
title: Crime and Punishment; author: Dostoevsky; price: 39.95; number in stock: 5; category: fiction title: Brothers Karamazov; author: Dostoevsky; price 34.50; number in stock: 3; category: fiction title: Java; author: Liang; price: 59.29; number in stock: 12; category: non-fiction title: Java, author: Horstmann; price: 14.33; number in stock: 4; category: non-fiction title: The Lion, the Witch and the Wardrobe; author: Lewis; price: 12.50; number in stock: 3; category: childrens
Here is my code so far. The first one is the "Blueprint" and the second one is the main.
public class Book { private String title; private String author; private double price; private int stockNumber; private String category; private int inventoryNumber =1000; private static int numberOfBooks = 0; public Book(String theTitle, String theAuthor, double thePrice, int theStockNumber, String theCategory)
When a JTextArea is created in a JScrollPane and the contents of the JTextArea change, the JScrollPane's preferred size doesn't change.
In the following code, I create a JScrollPane and a JTextArea as a client. I then, add contents to the JTextArea and call revalidate() on it to let the JScrollPane re-update itself. However, it keeps reporting the same preferred size.
import javax.swing.*; import java.awt.event.*; import java.awt.*; class c { static JScrollPane sp; static JTextArea ta; public static void main (String...args)
I have a practice exercise here wherein I will add a JOptionPane to a program. When the close button is clicked, the JOptionPane will appear asking the user to exit the program. If the user clicks "Yes," it'll, of course, close the entire program and not just the JOptionPane, but if the user clicks "No," it will return to the program. Please refer to my code below:
try { output = new DataOutputStream(new FileOutputStream("ProjSixExe4.dat")); } catch(IOException ex) { this.dispatchEvent(new WindowEvent(this, WindowEvent.WINDOW_CLOSING)) } final JOptionPane optionpane = new JOptionPane("Are you sure you want to quit this program?", JOptionPane.QUESTION_MESSAGE, JOptionPane.YES_NO_OPTION); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
The exercise said it must be placed before the EXIT_ON_CLOSE portion.
why overridden doesn't apply to variables. However, instance variables are stored inside the object.I ran below program and expected to print "two" but it gets printed "one".
class SupCont { String s = "one"; } class Cont extends SupCont { public static void main(String a[]) { String s = "two"; SupCont c = new Cont(); System.out.println(c.s); } }
I have a frame showing some textfields and a couple of buttons, the classical "Ok" and "Reset" buttons, which are supposed to confirm the values of the textfields (closing the frame) and reset them respectively.
I think I thoroughly followed the "delegation method procedure" for managing event, that is , create the button object, define a listener class (implementing the ActionListener interface) , and add the listener class to the button using the "addActionListener" method . But there's no way to make the whole thing work.
No exception. Only when I click the button the "actionPerformed" method of the listener is simply ignored, as if it didn't exist.
Here is the code :
public FrameViewAddEstrazione (String ExtrPath) { try { FilePath = ExtrPath; F = new JFrame (); PP = new JPanel(); PD = new JPanel(); // pannello data
Everything works in this except the part where drawing a convexhull and the convexitydefects around an object. Drawing circle around the COG works OK. I tried to draw them with these lines but no luck.
I have a 2d array that i am manipulating. In my class i have a constructor that takes the dimensions of the array and within th econstructor i need to randomly fill the array. However, when i try to manipulate it in the test program, all that prints out are the default values.
here is the class
import java.util.*; import java.lang.Math; import java.util.Arrays; import java.util.Random; class SummerStats
[Code] .....
And here is the printout
Enter number of rows(people): 3 Enter number of columns(years): 3 Enter number of person to find sum salary: 1 Enter year to find Max salary of that year: 1 [] [] The max salary is at index: (0, 0, ) The largest salary ocurred in year: 0 The sum of person 1 is: 0.0 The total of all salaries is: $0.0 The max salary in year 1 is: 0.0 The average salaries for each year: 0.0, 0.0, 0.0,
The total salary for each person is recorded below.
And the last method called doesn't finish or printout ie the program doesnt end
