Method Header For File Names?
Feb 27, 2015
I'm new to Methods and do not really know how to write a method header. What would an appropriate header look like for the following instance? getFilename: This method takes no parameters. It asks the user for a filename. If that file exists, it returns the filename. If it does not exist, it asks the user for another filename. It continues to ask for filenames until the user gives the name of a file that exists.
Also, how would I make a return tag for this and call it into the main method.
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Feb 26, 2015
I'm new to Methods and do not really know how to write a method header. What would an appropriate header look like for the following instance? getFilename: This method takes no parameters. It asks the user for a filename. If that file exists, it returns the filename. If it does not exist, it asks the user for another filename. It continues to ask for filenames until the user gives the name of a file that exists.
Also, how would I make a return tag for this and call it into the main method.
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Feb 7, 2015
In my book for learning java, one of the questions asks us to create a method header named convertTOKM that takes an int parameter, which is the number of miles, and returns a double value for the converted value in kilometers. I made one, but wanted to know if I was right in any way.
Here it is:public double convertTOKM(int miles, double kilometers){
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Mar 3, 2013
how to get the first few hex symbols of a file in java, for example if i input a pdf into my coding i want my program to output, e.g "25 46 44 38" ....
I have been able to print out the hex of a whole file but not managed to set a maximum read limit so that my code only takes a certain amount of values ....
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Jun 26, 2015
I have been trying to implement custom request method in HTTP header while posting my data to the server URL. My application specific URL accepts -X parameter and -d for the data and it is mandatory for that url. Basically I am trying to dump JSON data into my influx DB using CURL command which is working fine from the shell. But the issue is, if I am implementing the same in java with proper approach, it is not supported or working. My CURL command is :
curl -X POST -d '<my_json_data>' '<my_url>'
How can I implement the same in java using HttpUrlConnection or other available approach?
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Feb 24, 2014
The class Overloading below asks for two names and prints three different greetings. Your task is to write the class methods missing from the class declaration. Methods print the greetings as shown in the example print.
Hint:The names and parameter types of the needed methods can be checked from the main method because all methods are called there. This exercise also does not require you to copy the source code below to the return field.
The method declarations will suffice.
Example output
Type in the first name: John
Type in the second name: Doe
**********
Hi!
**********
Hi, John
**********
Hi, John and Doe
**********
import java.util.Scanner;
public class Overloading {
public static void main(String[] args) {
String firstName, secondName;
[Code] ....
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Oct 14, 2014
imagine you are implementing 2 interfaces having identical method signatures:
interface A {
void doStuff();
}
interface B {
void doStuff();
[Code] ....
How can I implement both methods?
Or another example with member variables:
interface A {
public static final int i = 3;
}
interface B {
public static final int i = 33;
[Code] ....
How can I go about making clear which 'i' is meant?
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Mar 30, 2015
In Java® identifiers, you are allowed letters and numbers (also _ $£¢€ etc, but you should avoid them in normal identifiers). So you cannot have spaces. You cannot write public class Hello World because the javac tool will see World as a separate identifier and not understand what it means and will fail to compile the code. You must write public class HelloWorld instead. And because the class is labelled public you must call the source file Hello World. java. Since you can't have two classes with the same [fully‑qualified] name, you cannot write two public classes in the same source file.
“What about names of source files?” somebody will ask. Well, some file systems will permit spaces in file names; ext4 will and I suspect so will NTFS. Can you write file names with spaces in? You would have to have a different name of the class inside the file, because you can't have spaces, and you therefore cannot make the class public, but maybe you can write a package‑private class with a different name.
On ext4, you have to write out the name of the file and the shell will interpret the space as meaning there are two different file, so you have to escape the space.
campbell@campbellsComputer:~/java$ gedit My First Class.java
// My First Class.java
class Foo
{
public static void main(String... args)
{
System.out.println("Hello, World!");
}
}
campbell@campbellsComputer:~/java$ javac My First Class.java
campbell@campbellsComputer:~/java$ java Foo
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Mar 20, 2014
I have a text file containing numbers and names as shown in the example below:
61133128805241Albert Rosenberg
64763645543509Joel
79256337754219Michael Burton
I'm making a program that will read the file and put the numbers in a list of int arrays and names in another list of strings. In my program i created two classes. One will receive the numbers and the other will receive the names. But i only can read the numbers! How can I read everything and separate into two different lists?
try( BufferedReader br = new BufferedReader( new FileReader( jFileChooser1.getSelectedFile().getAbsolutePath() ) ) ) {
hist = new Historic();//Will recieve the array of numbers.
while( br.ready() ) {
int line[] = new int[ 7 ];
[Code] ...
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Jul 28, 2014
i have a folder which contains two types of files (for eg: .csv and .tiff) with same names like, abc.csv and abc.tiff.How to compare the list of files with same names while ignoring their extensions.And my second task is to copy the content from csv file and i have to use that name as file name of .tiff file(Ex: if i have a1 as content in csv file, i have to change .tiff file name from abc.tiff to a1.tiff)
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Dec 17, 2014
I need to print contents of database to excel file.Apache POI is the solution but I am not finding a way to print the DB column names/headers into the excel.
E.g.:
incase csv we have opencsv CSVWriter writer = new CSVWriter(new FileWriter(fileName));
System.out.println("writer");
writer.writeAll(rs, true);
will print the db contents with the column headers dynamically whatever the query may be.
Any solution where we can print data and column names without know the query previously as we are getting query at the run time and each time the query is different.
INPUT
DATABASE
Emp Id. Emp Name
111 Mr.Test
EXCEL
Emp Id. Emp Name
111 Mr.Test
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Nov 5, 2014
I'm trying to write a program to read the names off of email addresses in a text file and my code is not printing anything to the console. So I want to print everything before the "@" sign. It seems like I'm missing a big thing
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Scanner;
public class Email {
public static void main(String[] args) throws FileNotFoundException, IOException {
[Code] ....
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Aug 14, 2013
How to set footer and header in word document/PDF using POI/open office. Using Java COde.!!
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Feb 2, 2015
I want to create a JTable which "Analysis","Date" and "Price" the names of columns in header. Here's a piece of my code :
String sql = "Select name, Price from analysis_tab where name ='" + idclicked + "'";
DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");
Date date = new Date();
PreparedStatement preparestate = database.con.prepareStatement(sql);
ResultSet rs = preparestate.executeQuery();
So, the value of Analysis and Price were stored in my Data Base, and the Date get the value of the current day. How can i create this JTable and how can i set the value into it ?
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Apr 13, 2015
I am making a gui in which i read values from text file to JTable. But i want to define the column header as A,B,C,D,E,F,G,H,I. Now when i read, the values from text file are getting displayed in Jtable headers. How can i achieve the column header as A,B,C,D,E,F,G,H,I.
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
public class Bb extends JFrame {
[Code] ......
Text file from where it reads values: bbb.txt
1 2 1 1 2 1 1.83e-02 -1.0 3
1 1 1 1 1 1 1.89e-02 -1.0 2
0 0 0 0 0 0 0 0 0
1 2 1 1 2 1 1.83e-02 -1.0 3
1 1 1 1 1 1 1.83e-02 -1.0 2
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Apr 12, 2004
My code runs correctly when i run the clients one after another without using threads.I am getting this following error when i run my multi-threaded server. When a server accepts a client connection, ClientHandler is the thread that handles that client.Exception in thread "main"
java.io.StreamCorruptedException: invalid stream header at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:737) at java.io.ObjectInputStream.<init>(ObjectInputStream.java:253) at comm.DOMTransfer.<init>(DOMTransfer.java:25) at ClientHandler.<init>(ClientHandler.java:18) at GridInfo.main(GridInfo.java:34)This is where the error occurs:input = new ObjectInputStream(socket.getInputStream());
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Mar 5, 2015
I'm developing a SOAP client and have used wsimport to generate the classes, etc. and all is going pretty well, but the server requires several headers that I've been coding up manually, specifically wise:Security and o:Security blocks. While this is a valid approach, I think I'm probably doing things the hard way and I know .NET (SOAP being an MS standard originally) has some really powerful code to generate these headers. Does java have any similar counterparts? As an example, I'm writing code like the following:
SOAPElement token = securityElement.addChildElement("UsernameToken", "o");
token.addAttribute(soapFactory.createName("u:Id"), "UsernameToken-1");
SOAPElement userToken = token.addChildElement("Username", "o");
userToken.addTextNode(user);
[code]...
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Aug 21, 2014
Displaying the records in a table. I am looking for a group header to be placed above each printed table for its related category and subcategory, as well as, the no. of the records for each table to be shown at the top of the table.
The table contains columns for category, subcategory, name. ex:
Category Subcategory Name
CON Retail AAA
CON Wholesale BBB
SPEC Retail CCC
What I am looking for is the below layout:
Category/Subcategory (No. of records) –similar to a group header
Name – Country ..etc ----Table header
table records
Here is my code below:
<%
//Retrieve the values from the DB
while (rs.next()) {
category_name1=rs.getString("category_name");
subcategory_name1=rs.getString("subcategory_name");
[code]....
The problem in the above code is that it is showing the group headers category & sub category multiple times and the count is incorrect.
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Feb 26, 2014
Is it possible to allow users to resize columns in a JTable that has no header? I'd like the user to be able to grab the column lines on any of the data rows and be able to resize just like they can in the header.
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Oct 18, 2014
I have been given a question about a object creation resulting in the constructor of the Time class being called, and to write the constructor's header new Time(21, 39, 55);
So, this would be simply "public Time" and have to give meaningful names to formal parameters, which is what i don't understand. Is it just private int hours; etc? I have also been told to attempt to write the body of the constructor and will need to estimate how the code in the body will work and to invent some fields.
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May 20, 2014
I'm doing a bit of styling in TableView. The result is quite nice but I can't make the left top corner round. This is the actual result:
[URL] ....
And this is the css :
.table-view {
-fx-background-color: transparent;
}
/*HEADER */
.table-view .column-header{
[Code] .....
I would also like the top left corner was round.
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May 23, 2014
I am facing an issue with the TableView in Java FX 8.
I am having a TableView created with data with scrollbars automatically added in when the Window is minimized.
I moved the horizontal scrollbar to right and then maximized the window to full.
After this the column headers remained no longer aligned with the content. When I click on any column header then the header aligns with the content.
The Issue is replicable also in case when a vertical scrollbar gets automatically added to a table view with preloaded data...
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Jul 5, 2014
I have a column of my TableView that just shows row numbers, and I would like to style the cells in that column so that they appears just like a column header (so the same styling as the headers use). I presume there is some simple way to do this by tapping into the right style class, but I am not sure which one.
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Apr 14, 2015
I am using the JavaFX dialogs. I have made a dialog as follows:
Alert d = new Alert(AlertType.CONFIRMATION);
d.setTitle(Resources.R(Resources.DELETE_DATA_SOURCE));
d.setHeaderText(...);
I want to make part of the header text bold -- I want a message like "Really delete X" where X is in bold.
Is there any way to do this with a dialog (other than rolling my own?).
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Apr 24, 2014
I will be developing a change and would like to know how can i parse a mail header in OBPM using java.
I want to get the message id, date and time the email recieved and email size.
Our code is already fetching the attachment of the email using the following syntax.
mailAttachments = mail.attachments;
I tried creating a variable like mailHeaders = mail.headers, would you know how can i get the details i want by parsing the variable? so far I wasn't able to check what mail.headers return as i'm currently having issues running our code locally due to DB connections.
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Mar 20, 2014
I know when including remember me token in request header, it will contain expiry date. does this mean the token generated must be able to be reversed back to it's original string?
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