32,199 Topics
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 | I have an Epson receipt printer (Model number: TM-T88V), but I cannot use it. I do not have a POS (point of sale) software that will let me do what I need to do, nor do I have the knowledge I need to understand the developers guide manual that comes …  |
 | Hi Dw. This is my first Android app, and what I'm trying to do is to post a POST/GET method to my webserver using Http in Android studio. I also have a Textview which suppose to display echoed data from server which will be a response to a request since … |
 | Define a class named Pair where the data(state) part contains two double-typed numbers, num1 and num2. The method(behaviour) part contain the following methods: o getSum() – returns the result of adding num1 with num2 o getdifference() – returns the result of substracting num2 from num1 o getProduct() - returns the …  |
| | Hello all, I have a code to encrypt data in C# and I want it to b decrypted in Java... following is the C# code [CODE]string Encrypt(string textToEncrypt, string key) { RijndaelManaged rijndaelCipher = new RijndaelManaged(); rijndaelCipher.Mode = CipherMode.CBC; rijndaelCipher.Padding = PaddingMode.PKCS7; rijndaelCipher.KeySize = 0x80; rijndaelCipher.BlockSize = 0x80; byte[] pwdBytes …  |
 | hi how can change the size of image: from CSS for three pages using dreamweaver ? how can i (position and reposition something in the page)? i tried this tag, but nothing change: img.resiz{width:200px;height:1000px; what is missing ?? should i include the img link? and what will be the correct …  |
 | {public RestaurantBill() { //Create DecimalFormat object DecimalFormat formatter = new Decimal("#0.00"); // Initialise instance variables //Declaring variable(s). double bill= 0.00; double billtip= 0.00; double billtax= 0.00; double total= 0.00; //Initializing variables. //Obtaining user's current amount without tax and tip. System.out.println("Enter the amount of your restaurant bill."); bill = input.nextDouble(); //Calculating …  |
 | hello guys I want to know about dependency injection in angular 4 and spring , so I gonna start with what I know : in angular 4 we inject the dependency by setting the service ( or something else ) in the constructor's arguments of component, and despite we inject … |
 | class robot: def __init__(self, length = 20.0): self.x = 0.0 self.y = 0.0 self.orientation = 0.0 self.length = length self.steering_noise = 0.0 self.distance_noise = 0.0 self.steering_drift = 0.0 def set(self, new_x, new_y, new_orientation): self.x = float(new_x) self.y = float(new_y) self.orientation = float(new_orientation) % (2.0 * pi) def set_noise(self, new_s_noise, new_d_noise): … |
 | I'm having problems compiling my program, I was wondering if someone could tell me where I went wrong and how to fix it. I would be deeply apreaciative of your help!!!! :) import java.util.Random; import java.io.Console; class project2_0 { int[] race = new int[70]; int tortoise; int hare; Random randomnumbers … |
 | I have this use case where in I would need to dynamically create java objects out of json input and insert the data into sql tables. I tried using gson APIs but unfortunately we need to specify strucuture of that class (Car.class). Is it possible to dynamically achieve the above … |
 | This time we would like the user to enter the following details for 3 items: name, cost price and quantity. Your program should the print out a receipt including a tax amount of 11.75% on the subtotal of all the three items entered. The receipt should be formatted in columns … |
 | Hi Guys, Can anyone share the code for HL7 integration with Java. |
 | Hi everyone, I'd like to ask for help modeling my JPA entities and their relationships with each other. I use more abstract class names as class names in my project[](https://phonty.com/), so I'm going to translate that into a "more tangible" example. I start from a festival where several gigs take … |
 | Hi guys, I'm playing around ith optionals a little, but I'm not surewhether this is the correct behavious as I'm getting a null pointer exeption (I thought the point of Optionals was not to get a null pointer.) SO I'm setting an object to null and before calling toString on … |
 | I trying to write a `spring batch` using `SpringBoot`. At first the program will read data from database, then write it to `.csv` file format. This is the code I have tried **Reader** @Bean public ItemReader<A> Reader() throws Exception { List list = new ArrayList<>(); JdbcCursorItemReader<A> reader = new JdbcCursorItemReader<A>(); … |
 | Hello friends, I'm trying to remove all tags from a Wikipedia entry, leaving a simple text file. I have downloaded an HTML file from Wikipedia and hunted through my program. But the tags are not removed properly. Instead, only nonsense comes out of it. Where is my thinker? Java: import …  |
 | I have written a formal Deadlock prevention code but I'm having trouble implementing this algorithm. Any help is appreciated. I have represented the algorithm below, **Formal algorithm description** Data structures at a process i: (It is the initial value in the parentheses.) • OUTi: set of integer, the set of … |
 | i just want to write a code for simple fare calculator using conditional statements in JAVA. whose out should be: Enter the distance covered: 22.6 First 5 KM : 50 Rs. Next 15 KM @12 Rs: 180 Rs. Next 2.6 KM @14 Rs. :36.4 Rs.  |
| | Well, I've been learning Java and I managed to create an FTP client that uploads and downloads files from a server. Oddly, the thing I can't figure out is how to do an FTP delete. Can anyone help me on that? I don't want to use an API or someone … |
| | Spring Batch exception records inserting in database Hi, I am currently working on project wherein I am reading, validating and then inserting records in database. Now, 1. While validating, if some erroneous record comes up, I have to update its status in db and continue processing next record. 2. If … |
| | I am trying to use the getParent method of the File library. Here is the code I am working with, but I am getting a null string: public class MyCode { public static void main (String[] args) { File f = new File(""); String name = f.getParent(); System.out.println(name); } } … |
 | I am developing a new android app, and I've run into a bit of a snag. While everything else works, I want to have it so that when you click on the screen, it exits the program, same as if you click the back button. How do I get around … |
 | hello i want to create two arrays i have the index for them and the size and have the dot product of a and b and create a third array that is c[i]=a[i]*b[i] however i tried to do it but the output doesn't come the correct :( import java.util.Scanner; public … |
 | Hello everybody, so I am haveing two tables (GUI is used), each has name and number colums, and I want to sum numerical columns only (which I have done) and want to use jtextfield to show user after a button is pressed, strings like "greater, less, equal to". So the … |
 | Hey guys this is my first time using this site. Im having trouble creating a grading scale that averages out grades. Whenever I enter the grades in from the console I get some odd answers that make no sense. Can someone give me some pointers in the right direction? public … |
| | Hello, I would like to develop a sprite editor. Therefore I have programmed a software like paint. As you can see on the picture, on the right, there is a canvas with a grid on it. I use a GridBagLayout to manage every widgets inside my window. The canvas is … |
| | Hi.. Am actually trying to write my final year project on how to use Android phone as remote control for pc.. Pls can anybody put me through on what to do and how to start it because am a newbie trying to build an android app.. Thanks  |
| | I feel hard to understand how the LayoutManager work even the GUI is quite simple. I trying to make the button place below the Tel No JTextField, but it placed beside Address JTextField , not below TelNo JTextField. package gui; import java.awt.BorderLayout; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.Insets; import javax.swing.Box; … |
| | Hello. I am new to Android Programming, and am using Android Studio to practice with. Right now, I am trying to learn how to create a new Activity and transition from it to my main Activity. So far, I have my MainActivity up and running. The code is: package com.example.cory2.thezoo3; …  |
| | Hi, I am a newbie to Java and I want some help with designing a simple search engine in java. The program would read from a text file and would display the results. If I searched for some keyword say "star" it should show me something like the following: Star …  |
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