Swing/AWT/SWT :: Generating UNCOMMON Format File Using Java
Oct 17, 2014
Well I want to generate a license key for my software product. I'm aware of Google's Guava Libraries for generating alpha numeric license keys. But I'm thinking it to do in a different way without using any such libraries or specifically guava libraries. Till now this is my plan that,
1. Get a MAC ID / IP Address of the system in which the application will be installed and ready for it's first use.
2. Store that MAC ID in a UNCOMMON File format in client's PC only.
3. And what should be the next step.?
Is there anyway to format my input file "IF1.txt" into an excel/csv file, but with the content rearranged into a desired format? (all of this has to be done by a java program)
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
private String displayFormat = "%02d:%02d:%02d";// produces 00:00:00 hour:min:seconds public void timerHasChanged() { currentTime = System.currentTimeMillis(); // How long has been taken so far? long secsTaken = (currentTime - startTime) / 1000; long minsTaken = secsTaken / 60; secsTaken %= 60; long hoursTaken = minsTaken/60; minsTaken %= 60;
Formatter fmt = new Formatter(); fmt.format(displayFormat, hoursTaken, minsTaken, secsTaken); timerJbl.setText(fmt.toString());
How would i code the get and set method for format, so in property tab a user can choose if they want the timer shown in seconds, or minutes or hours or seconds&minutes
I am designing simple app which would store data about users and generate standard letter and print sun ray card for this user. I know how to build UI, how to validate it etc. I know how to store data in database, but I don't know how to deal printing.
I have MS doc template documents they contain jpg pictures, and unusual formatting Is there a way of actually pulling those templates and do the merge and perform print operation? If it is not easily done, what else I could do? I would need to have option to easily edit those templates in case of any changes.
Am facing a very strange issue. While trying to compile a very simple Hello World java program, the compilation completes successfully without any error or warning, but it does not generate the class file.
It happens when I compile with a particular jar file, otherwise compiling only the program (or with any other jar) does generate the class file. I am using java 1.7.0_45.
I have a problem in generating reports using java code. I created a report using iReport 5.5.0 with MySql Database connection. In iReports, it shows the correct output while previewing it. Then i copied my .jrxml file and pasted it into my netbeans project folder(..sample/web/WEB-INF/sample.jrxml) and then i added the required jar files in my project's library folder. i am generating the report in netbeans using jsp and servlet. THE REPORT IS GENERATING AND SAVED SUCCESSFULLY IN MY DESKTOP. BUT IT DOESN'T GENERATE THE REPORT FOR FIRST RESULT. For Example.., if i generating report based on a particular date. After executing the query, it returns 4 results. So it has to create the reports in 4 pages. But it generates the report for last 3 pages only. It doesn't generate the report for first page. I have attached my .jrxml file servlet file for your reference.
I get the value from database and display in table , price value will show 6 decimal and date value will show date and time.What to do to show only 2 decimal places and only date e.g. 1/1/2014 in the table ?
I made a game but i didn't add imports, i have been told i need to have imports and it needs to be in a normal swing format or it will not pass . How to change my code to swing format?
My code is
public class TextTwist extends javax.swing.JFrame implements java.awt.event.ActionListener { // hard code, should be picked from a Problem class private String[] letters = {"F","O","C","I","E","F"}; // hard code, should be picked from a Problem class private String[] solutions = {"ICE","OFF","FOE","FOCI","OFFICE"};
[Code] ....
How do i get the program to move on to the next one String?
I'm working on an assignment where the program has to process a file and read every line then print it out in all caps. I'm pretty sure I have most of it written out, however, I am having trouble with my main method. I am supposed to call my go method in my FileProcessor class and have it use the StringProcessor interface to call my Upper class. I'm using an interface because I will be adding other classes later, but for now I am having trouble with implementing it all in my Driver class.
How do I declare a StringProcessor object in my Driver class and how can I use it so that it would create the file in all caps?
I want to store sql query in tree format in xml file.I wrote a code which split the code into different tokens and store it in xml file.I am storing keywords like "select",from,where etc as xmlelements and the values of these keywords as textnodes inside corresponding elements.When the query contains single single statement it works as i need.but when nested query occurs i want to store the nested query inside "where" element.In that case the code didn't works properly.I am hereby attaching the code. When i try to store the xmldata in "CreateFiles.xml" file ,the file is not displaying in the corresponding folder.what is the reason for that?
CreateXml.java /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package querywork; import java.io.File; import java.io.StringReader; import java.io.StringWriter;
I have a question with this gui project I am building, I have gotten the code to work in very basic forms such as the main part of calculations and etc. But now I am in the phase of validation to make sure the textboxes aren't empty and are in the correct format. I have done alot research already. I would like to use a Joptionpane to warn the user of an invalid entry. But I have tried many different methods and I can't seem to get them to work.
When ran I get these errors: (only copied a few of the main lines)
Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "p" at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1241) at java.lang.Double.parseDouble(Double.java:540) at car.loan.NewJFrameCarloan.calculateActionPerformed(NewJFrameCarloan.java:228) at car.loan.NewJFrameCarloan.access$500(NewJFrameCarloan.java:17) at car.loan.NewJFrameCarloan$6.actionPerformed(NewJFrameCarloan.java:106) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
I am currently working on an application with java and I want to do is upload and download details in .xlsx file. Uploading process is successfully worked but the problem is that when I download the file .xlsx with details at opening the file it gives me the following message :
Excel cannot open the file '(filename)'.xlsx' because the file format or file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file.
When I am trying to read data from BufferedReader and writing into excel using FileOutputStream object with POI APIs then i am getting the data in excel file in bad formats. you can check the log file and excel file attached for more information.
Here my problem is I cannot use BufferedWriter in place of FileOutputStream because POI class XSSFWorkbook only have one write method and we can only pass FileOutputStream class object there.
I have a tool that outputs a UTF8 file. This file is to serve as an output to another utility that functions with a UTF16 input.Is it possible to write a small script that will convert the UTF8 to UTF16 so that I can put it in a batch file.
The basic gist is it's "A program that reads in a text file that uses a specific input format and uses it to produce a formatted report for output."
Specifically :"For this lab you will write a Java program that produces a simple formatted report. The program will prompt the user to enter a file name. This file must contain information in a specific format (detailed below). Each "block" of the file contains information for one player in a competition -- the name of the player followed by a number of different scores that that player achieved. The program should find each player's average score, median score and best and worst scores and display them in a line on the final summary report. The program should also determine which player has the highest average score and which player has the lowest average score."
I get the following errors when I try and compile it:
Enter an input file name: Project11.txt Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException... -1 at java.util.ArrayList.elementData(Unknown Source) at java.util.ArrayList.get(Unknown Source) at Project11.getMedian(Project11.java:68) at Project11.main(Project11.java:27)
I get that the error(s) reside in lines 68 and 27, among problem other areas, but I'm not exactly sure how I can fix them.
Here's my code:
import java.io.*; import java.util.*; public class Project11 { public static void main(String[] args) throws IOException{ Scanner in = new Scanner(System.in); System.out.print("Enter an input file name: "); String input = in.nextLine();
The intent of the code is to read date from a file, does calculation and then displays that data in a table format on the screen. Then creates another file with those values:
Reads file: Beginningbalance.txt Displays Data with calculation Creates a file called "Newbalance.txt" with the following values:
111 251.41 222 402.00
With the way the code is written I can get it to create the file but it only displays one of the customers (111). I know that I need to create a loop but I am not sure how to build that. I tried creating another while loop and changing it to outFile but that was without success.
import java.io.*; import java.util.Scanner; import java.text.DecimalFormat; public class Output { public static void main(String[]args) throws IOException {
I am working on a program where i calculate a fee using a method. I know i have to import the decimal format utility of java. "import java.text.DecimalFormat;" then i have to create an object for the decimal format. With "DecimalFormat f = new DecimalFormat("0.00");" What i am wondering how do i apply it to my system.out.println statement. I know i have to use for instance f.format(calculateFee()); Is that the right syntax for displaying the results because i generate a syntax error that way.
In the Employee's toString, you are using the NumberFormat class to format your hourly rate and weekly pay but you are supposed to use java string formatting only (%f). You should change those to use only string formatting - no use of NumberFormat.
package coursework; import java.text.NumberFormat; public class Employee { private String firstName; private String lastName; private int employeeId; private double hourlyRate; public Timecard timeCard;
I have a piece of code as below for date format conversion.
DateFormat formatter1 ; DateFormat formatter2 ; Date date = new Date();
formatter1 = new SimpleDateFormat("yyyy-mm-dd"); date = formatter1.parse("1952-12-10"); System.out.println("before format, date is " + date);
formatter2 = new SimpleDateFormat("dd-MMM-yy"); formatter2.format(date); System.out.println("after format, date is " +formatter2.format(date));I would like to change 1952-12-10 become 10-DEC-52, h
However, I am getting below output:
before format, date is Thu Jan 10 00:12:00 MYT 1952 after format, date is 10-Jan-52
