I have a method that checks to see if a file exists, if so, it reads the data contained therein, if not it calls another method then exits.
public void checkLoadPreviousStationStatus() throws FileNotFoundException, IOException,
ClassNotFoundException, EOFException, TempArrayOutOfBoundsException{
File f = new File(staFileName);
//if station file already exists load the info
if(f.exists() && !f.isDirectory()){
[Code] ....
My question, do I need to delete this file before exiting the method f.delete();? If not, what happens to it when I exit the method?
Memory recalled from a long ago taken c++ class: It's just reserving a memory location that will or will not be used isn't it? If nothing is stored in that location the reservation goes away right?
My code below creates the 2 files successfully, but it is not able to write the sample data into the newly created file. I can't figure out the reason why.
Another strange thing is that when I tried inserting System.out.println calls for debugging, nothing prints out.
I have been going over my code line by line, over and over again for nearly and hour now...When I execute method `file.createNewFile()`, the method returns true and throws no exceptions. It even says that the file exists. However, the file is not created and cannot be accessed until the program has exited.
File portLib = new File(""); private class RememberPortAction extends AbstractMenuItemAction { methods... protected void actionPerformed() { LibraryCreator creator = new LibraryCreator(self, logger); File newPortLib;
I have a text file with the below details and we get the input as name CONNECTION_PORT and we need to delete the matching global variable which as CONNECTION_PORT and keep the remaining global variable in file without using any temp files.
I am trying to update and delete products from a JSP page but am having a hard time getting the code to work. I keep getting errors and my program won't run. My Index.jsp page works, but everything else is messed up. Below is my code.
index.jsp <%@page contentType="text/html" pageEncoding="windows-1252"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
This is the code that i have used to delete particular String from text file. It works absolutely fine on eclipse and netbeans.. But on deployment(in tomcat) it fails to delete message/rename or delete original file even though all permissions for modifying the files in the folder has been given to all users.
I'm trying to read a xml file and delete it's contents. I do this by reading the file,writing it to a temp and then overwriting the original with the temp by renaming it
//overwrite original xml file with new file boolean successful = outputFile.renameTo(inputFile); System.out.println("success");
It does say the value of the local variable is not used however. I've debugged to ensure it hits the code it always prints out the line after too.It just does not overwrite my original xml file with the temp one.
It's had votes on stack so I thought that would of been reputableStack - overwrite but the second one got voted as a good answer. But still I would like to know if my code can work or not.
How should I access object, which I have created in servlet? Servlet handles the requests(controller) and forwards to requested jsp page.Some of the jsp pages need EJB objects. When i create an ejb object in servlet and then forward the request to jsp, how can i access the object in jsp ? This should be MVC - based application, like JSP-Servlet-EJB.
Is it possible to have the value of an entered String to be set as the name of the String to be created whilst running.For example: String username= Keyboard.readString() & the user entered for example the word: "Hello".Is there a way how I can make the Java Program create another String named Hello (Inputted value of String username).
If this is allowed, what do I have to use and if possible show me exactly what I have to do with the example mentioned above?
Write a piece of code that would change something in the one of the buttons created using the loop? I have spent few hours reading about the arrays, different methods and can't think or apply a working solution.
Which is the best way to keep track of the number of the objects I've created?Is is a good practice to have a static variable, which will be incremented everytime I call a contructor?
I have started working on a little project in my free time. It is just a simple text rpg that runs in a counsel window. I have 5 files each file contains 1 class.
public class SomnusCharacter { private String gender = ""; private int age = 0; private String race = ""; private int level = 0; private int xp = 0;
[Code] ....
The chain of events right now is:
1. MainMenu is run 2. If user inputs n CreateCharactor is run 3. User inputs name, age, ect in SomnusCharacter object made in CreateCharacter 4. Intro (just rough demo for testing purposes) is run 5. If user inputs m Menu is run 6. Menu calls and prints out all the information from the object made in CreateCharacter
Step 6 is where I am having my problems. How can I reference (lets say the SomnusCharacter object made is called player) player from my Menu class? I know that if I made a new character that it would just create another SomunsCharacter object with the default values again.
I have create as short example which contains two classes Cat and Dog followed by a switch statement in the main method.
Class Cat
public class Cat { private String name; //Setter public void setName(String pName) {name = pName;} //Getter public String getName() {return name;} // Constructor public Cat(String catName) {name = catName;}
[code]....
My Issue is that after creating the objects within the switch statement, is there a way to return the objects back to the main method once created within the switch ?
I am little confused about String creation in java.
Doubt 1: How String objects assigned to Pool area:
1. String s="in pool"; 2. String s1= new String("not in pool");
How many objects created in statement 1 and 2. According to recent discussion with my colleague, one object created in String pool in case 1. And in case 2, two objects are created, one as literal goes to String pool and other with new() opr goes to Heap.
If above is correct, Ain't we wasting double memory for same object ? Really need clear understanding on this
Doubt 2: How does intern() work: Please see if my below explanation is correct
1. If String literal is already present in String pool , and i create a same string with new operator, reference to object is changed to pool area.
2. If String object is created using new operator and intern is called on it. If same string object is not present in the String Pool, Its moved to String pool and reference to this in Pool is returned.
I have a situation where I have 2 classes and an array of objects which are causing me trouble.
The object type is one I have created - it is made from a class which is neither of the 2 classes I previously mentioned.
The array is created and occupied in Class1 and the problem arises when I try to reference one of the element from Class2.
At first I forgot the the array would be local to Class1.main so I made the array a global variable using:
Java Code: public MyObjectType[] myArray; mh_sh_highlight_all('java'); Then I tried accessing an element (2) from Class2 using:
Java Code: Class1.myArray[2] mh_sh_highlight_all('java'); However I get errors saying that I can't access the static variable from a non-static context.
I understand a little bit about static and non-static objects/methods but don't know how to fix this. Do I need to include "static" in the array declaration?
I am working on an independent project it is a simple little text based rpg that will run in a counsel window. I have an object for Character that is creating during a CreateCharacter method. I want the play to be able to enter a character that will open up a menu that displays things like the name and health and stuff of the character from the object created in CreateCharacter, but because I have it in a different class I don't know how to reference the object made in CreateCharacter.
I have it in 6 files
Character --- Object with getters/setters for things like name, age, race, class, ect MainMenu --- Displays title and promts for new game and quit CreateCharacter --- Walks through and sets all values in Character Stats --- Keeps the players stats (health, attack, ect) in an array Intro --- Beginning demo thing (not really important for this question) Menu --- Displays all current user stats (Having issues with this one)
I've this "program" that shall manage to register a dog, show a list of all registerd dogs and delete dogs from the list.. And I'm stuck at the latter one. So I've to classes, one for the dog and one for register/program. This is my main program
package hundRegister; import java.util.Scanner; import java.util.ArrayList; public class HundProgram { private static Scanner tangentbord = new Scanner (System.in); private static ArrayList<Hund> hundlista = new ArrayList<>();
[Code] ......
So, when I enter a name on a dog that exist on my list, it just jumps down to } else { and write that dog can't be found even if I write the exact name on the dog.
I can't see what I'm doing wrong, been trying out different methods now.
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"
leaveQ method does not work..To see the other files related to these code click here:(Its a dropbox location) URL....Java Code:
public class CustomerQ { private int MaxLength; private int totalCustomers;//assuming #of customers served int Qlength; Customer cus; LinkedList4Q cus4Q;
