I would like to syout on the console a line of a serialized object in this example I would like to have as output 80 20 in the console. How can i put the scroll to my code?
import java.io.*;
public class Box implements Serializable{
public static void main (String[] args) throws ClassNotFoundException {
Pond myBox = new Pond();
myBox.setWidth(70);
myBox.setHeight(20);
[Code] ....
I have a program I am trying to get together for class. Its a simple calendar, and I'm trying to save an array of dates to a file to be able to recall at will. I have done a fair amount of research but couldn't find a solid method to what I'm trying to do. I have a method that will check the inputted date's file to retrieve or save an entry. Here is where I'm stuck.
baseFile = new File("C:\Users\Ian\Documents\Eclipse (Java)");
private void getFile(String month, String year) throws IOException {
String filename = new String(baseFile+"\"+month+year);
File file = new File(filename);
if(file.exists()){
[Code] ....
This is pretty much the most reasonable method I could find. this is called as a sort of plug for two other methods to call. Everything compiles, no errors or warnings, but no files are being created.
I am working on a project that requires me to build a database with random access file, representing products, the base product contains a name (about 30 characters), a price (double), and a quantity (integer). I have worked on this project for probably 15+ hours and have tried so many things and feel like I've barley made any progress...
The part i am really struggling with is taking the data from the text file and creating an object array with it using the product class. Once ive accomplished that, i have to use that data to create a random access file with the data.
Here is the base Product class that must be used to create the objects for the array.
public class Product
{
public String pName;
public String stringName;
public double price;
public int quanity;
[Code] .....
And then here is the data from the text file that i must extract to use to create product objects.
Dill Seed,938,34
Mustard Seed,100,64
Coriander Powder,924,18
Turmeric,836,80
Cinnamon (Ground Korintje),951,10
Cinnamon (Ground) Xtra Hi Oil (2x),614,31
Cinnamon (Ground) High Oil (1X),682,19
These continue for about 40-50 entries, they are not separated by a blank line though i had to add those so it would display correctly, each entry is on its own line with name separated with spaces, then price after a comma, then quantity after the second comma.....
I have problem with writing objects to file. The thing i want to do is write object(Measur) and then read it from Notepad++. Not from program, but normally from computer. When i'm opening my file i see patterns(i dont how to call this). I think, that I need write it as a string in some way. There is my code:
Java Code:
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;
class Task3 {
[code]....
I am working on a little project to create an App that can read contents from a website and return it back to my app. What protocol to use for that. Just the reading/retrieving content from a website.
View Replies View RelatedI am fallowing programming tutorials on youtube.And this code is for reading zip files content.I did the same things like in the video.But Code dosent work
try {
ZipInputStream zis=
new ZipInputStream(new FileInputStream("C:UsersxxxDesktop ry.rar"));
ZipEntry zip;
while((zip=zis.getNextEntry())!=null){
jTextArea1.append(zip.getName());
zis.closeEntry();
}
zis.close();
} catch (FileNotFoundException ex) {
Logger.getLogger(Zip.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(Zip.class.getName()).log(Level.SEVERE, null, ex);
}
1. creates a file.
2. ask user to write into that file
3. save the file
4. print content of file.
Is my current exercise, so far i have gotten the code to create a file. What should i use to ask user to write into that file and save?
package assignment7;
import java.io.*;
public class Exercise2
{
public static void main ( String [ ] args ) {
String filePath="newfile.txt";
File newFile = new File ( filePath ) ;
[Code] .....
1. creates a file.
2. ask user to write into that file
3. save the file
4. print content of file.
is my current exercise.so far i have gotten the code to create a file, and ask the user to input their age.what should i use to save what the user writes into the file?
Java Code:
package assignment7;
import java.io.*;
import java.util.*;
public class Exercise2
{
public static void main ( String [ ] args ) throws IOException
{
Scanner scan = new Scanner(System.in);
[code]....
Why is HttpServlet serializable? Do we need to serialize the controllers in our web-application? Pros of it?
View Replies View RelatedI am trying to read a content of file downloaded from ftp and return it as a String. This is what I use:
Java Code:
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.net.ftp.FTPClient;
public class Test {
public static void main(String [] args) throws IOException{
FTPClient ftp = new FTPClient();
[code]....
The code does not work, although all the links are correct.
String contentType = fi.getContentType(); gives text/plain when my file is.txt file and gives image/jpeg when my file is .jpeg file but when my file is .jar or .docx it will return application/octet-stream and application/vnd.openxmlformats-officedocument.wordprocessingml.document respictively so what to do to get exact mime type.
View Replies View RelatedShow me a code where I can get text file all content to String?
View Replies View RelatedI just created an applet that I want to call from a html file.
The applet code looks like this (and works):
package jav12;
import java.awt.*;
import javax.swing.*;
public class Welcome extends JApplet {
public Welcome(){
}
public void init() {
getContentPane().add(new Label("Yessss it works",Label.CENTER));
[Code] ....
When I click on the html file the content of the page is blocked and the applet isn't loaded. What can I do to fix this. I think it has something to do with rights. This is a crosspost to JApplet content blocked
I have the file in my project sitemap.xml, which i am trying to write via XMLStreamWriter. My code gets successfully executed as i can see the logs. But my sitemap.xml file keeps blank. Why nothing is getting write in my sitemap.xml file. Below is my servlet code.
@Override
protected void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response)
throws ServletException, IOException {
logger.info("request.getResponseContentType() ::: " + request.getResponseContentType());
logger.info("root path is :: " + rootPath);
if (request.getResponseContentType() == null) {
[Code] ....
I can see "END Document" and "Location is " under my log file.
Is there a way of detecting the file's type (whether it is a pdf, jpg, png,or anything else) by reading the content of the file. We could read the extension of file to determine it's type, but then extensions can be forged too. So I would like to know if the content inside a file is of a particular type or not. I'm not sure about this, but I have heard somewhere about each having having a specific kind of header which determines its type. So is it possible to read that header and determine it using a program?
View Replies View RelatedThis is sort of like the last problem I had but it's all about the formatting at the end. I have a file that reads something like:
Name
a bunch of text here
and perhaps a second
or even a third line
I need to output this as:
Name; "a bunch of text here and perhaps a second or even a third line"
Right now I find 'Name' and it outputs:
Namea bunch of text here and perhaps a second or even a third line
How would I add ";" and quotes in the middle? I can imagine that I may need to find name, then skip to the next line and just add name manually as the variable output of the search string.
This is where I am now
public static void main(String[] args) {
boolean output=false;
String name="";
String junk="CHAMBERS";
TextIO.putln("Search for a name");
name = TextIO.getln();
TextIO.readFile("doc.txt");
[Code] .....
So I'm almost there, but those dange double Names are killing me. I tried to add a bit of code where:
if (line.indexOf(name) >= 0){}
<%@ page import="javax.print.*"%>
<%@ page import="javax.print.attribute.*"%>
<%@ page import="java.io.*"%>
<%out.println("Printing...");
String filename = "c:/20140505_3_40.txt";//this is the text file i want to send to printer
// am using tomcat 8
PrintRequestAttributeSet pras =
new HashPrintRequestAttributeSet();
[Code]...
I have a program that writes a user's input to a file.
The input consists of several loops. In each loop the user enters a student number, the student first name and last name and then several exam results. Each student has different number of exams, depend on the user input.
For instance, the input can be (explanations are in brackets but not in the actual file):
505 (student number)
efron (last name)
ben (first name)
3 (no. of exams)
88 (1st exam mark)
70 (2nd exam mark)
... and so on
I need to write a program that reads that file and writes it to the screen, but it needs to do it in ascending order according to the student number.
Leaving aside the format it will be displayed on the screen, my question is how should I sort the data by the student number?
I though about first reading each student as an array, but my problem is that each array contains different number of elements (depends on the number of exams) and also each array containד both strings (first and last names) and ints.
I have a flat file (.txt) with contents in a predefined format. I need to parse and look for a particular content and update it. How can i achieve this using Java.
View Replies View RelatedI'm trying to make a search engine that will search my computer given a path with any options i decide. So if i decides to look for the file name "resume" with extension "pdf", it will give me the files in the directory, including subfiles.
import java.io.*;
import java.util.*;
import java.text.*;
public class mySearch
{
private final static int path = 0;
private final static int name = 1;
[Code] .....
This issue is regarding response from the servlet
I have written a code to download .csv file with records from DB.
To download records i am uploading a .CSV file containing telephone number.
After downloading the .CSV file page is not getting refreshed.
Below is the code snippet i am using,where i am setting response content type as test/csv.
ServletOutputStream op = resp.getOutputStream();
// Set content type of output
resp.setContentType("text/csv");
resp.setHeader("Content-Disposition", "attachment; filename="test"");
op.flush();
op.close();
How that page will get refreshed after csv file download or after response.
I have a requirement where a large file (100 -200MB) is uploaded from the client to a content management system. I am using a servlet with Apache Commons File Upload API. Apache FileUpload has 2 ways of handling files,
1) Non-Streaming
2) Streaming
Currently I use the Non-Streaming approach where the servlet stores the file in a temp location and upload the same into the content management system - This is taking lot of time so I am trying to implement Streaming API.
Content Management API supports streaming in 2 methods,
a) SetContent - Takes the file's ByteArrayOutputStream as input -> This gives OutOfMemoryException because the file being large
b) AppendContent - Takes the file's ByteArrayOutputStream as input -> This method can be called multiple times to upload the large file but I dont know how to do this. The Apache File Upload gives InputStream of the file and I need to split that into chuncks and append into the content management system.
How to convert InputStream to 4KB ByteArrayOutputStream so that I can use the AppendContent method in content management API?
I have wrote this class who read from text line by line and save the words in fileOnTable.. Now i don't know what to read in ReadOffer to save the words in object offers and return this..What JUnit test can write for this code..?
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import com.example.crazysellout.Offer;
[code]....
New to programming. Am supposed to create a program that reads a text file (of integers) and computes a series of computations on these integers. I don't have the code for the integers in my code yet, (i know how to do those), but am struggling getting the array to simply print in the print writer. I have the user select a text file, read the file with a scanner, and then save the computations done from my code into another file. specifically, the problem is as follows: Write a program that uses a file chooser dialog to select a file containing some integers. The file contains an integer N followed by N integers. The program then uses a file chooser dialog to let the user specify the name and location of an output file to write results to.The data written to the output file will be as follows
(1) The original list of N numbers from the input file,
(2) The original list of N numbers printed in reverse order of how they appear
in the input file.
(3) The sum and average of these numbers,
(4) The minimum of all the numbers,
(5) The maximum of all the numbers.
[import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;
[Code]....
Well my code is supposed to ask for an input file and then (ex: input.txt), read the input file and create an output.txt file with the anagram for the words in the file. Also it should be displayed on the screen. However my code doesn't display the anagram on screen or the output file!
Heres is the code:
import java.io.*;
import java.lang.*;
import java.util.*;
/* This program will read a file given by the user, read the words within the file and determine anagrams of the given words. If the file that the user inputs is empty, then the program will output "The input file is empty."
* The program will read the file line by line, counting the total number of words read. If there are more than 50 words, "There are more than 50 words."
* will be printed, and the program will terminate. After each line is read, the words in the line will be separated,punctuation characters will be removed, and upper case characters will be switched to lower case.
* If any word is larger than 12 characters, that word will not be considered in the total amount of words in the file and it will not be sorted.
* After each word is read, the letters will be sorted and stored into an array containing each
* word's 'signature'. After all the words have been read, words will be printed to the output file on the same line based upon their signature.
*/
public class Anagram {
//Creating constants for maximum words in file and maximum chars in word
public static final int MAX_CHARS = 12;
public static final int MAX_WORDS = 50;
[Code] ....
I am trying to create a file browse option in my jsp and later after browsing, all i want to do is to read that file in my jsp without saving it into that database so that i can perform encryption for it and save that encrypted file later into my database. please provide reference link so that i can refer to some applications and and move ahead with my work.
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