36,051 Topics
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| | double[][] a= new double[5][5]; int i,j; int [] controller= new int[5]; Random rand=new Random(); for(i=0; i<5; i++ ) { for(j=0; j<5; j++) { do { a[i][j]= rand.nextDouble(); if(a[i][j]>0.0) controller[j]++; System.out.println("a[" + i + "][" + j + "] = " +a[i][j]); }while( controller[j]==3); } } /* I create some random … |
| | Hi, I need some help please I am still learning java,How can i convert infix to posftix using BST?...so far this is what i have got. Thank you in advance. `package com.binarysearchtree.BSTNode; class Node { private Object item; private Node next; public Node(Object item,Node next) { this.item = item; this.next … |
| | any one is here that explain to me that how to get console input using BufferReader in java and explain me its working briefly. |
| | I have a problem with `asynctask` in android Java. it's the same problem as this : http://stackoverflow.com/questions/15457482/variable-returns-null-outside-asynctask-android my asynctask get data from a url , to get direction of `google maps` ! This is where I call my code , inside onrespondre => myvaraible have data but outside the variable … |
| | I have a rectangle "ball" that is striking another rectangle "b1". I'm trying to make b1 the color of the background and not able to be hit by the ball object anymore, but I don't know how to do that and I couldn't find anything online. Any help is greatly … |
| | Hello I have final project for java and I didn't know how to do it >< may help me to solve it?! ------------------- Consider the following table about students’ grades for quizzes in class : http://s8.postimg.org/a9sqir7md/Screenshot_2014_05_28_11_26_53.png 2 Write a Java application that calculates the minimum, maximum, and average for each … |
| | i want to give input like {a,b,c} and want o/p {{},{a},{b},{c},{a,b,c}}  |
| | What are the benefits that JVM brings to the development and deployment of server applications |
| | hi everyone im studing computer science , i have question about margeSorting i do not undrstant how it going ??? i do not know where i shold put my question public static int[] mergeSort(int[] a) { if (a.length == 1) { return a; } else { int n = a.length …  |
 | hello everybody; up to what level can I use javascript (taking advantage of the strength of phonegap or Titanium) to create an android application. ex 1:can I create or run a service (in the android sense) !!! ?? or can I access to the GSM properties like provide package android.telephony.gsm. … |
 | I'm having some issues with one of my bonus assignments for school. In my code the purpose of the project is posted, but this is what I have so far. /******************************************** *File Name: Combination (Assignment 8 Part 1) *Purpose: Create a frame with ten buttons, labeled 0 through 9 (Hint: …  |
| | So here's a bit about the details. I need to read the contents of file A, and B and store it in file C by joining the contents of A and B and also counting the number of letters/characters present in it. I've come up with this so far. Can … |
| | So I am writing a program to read text from a file. Save from an array list to an array and then parse that array for ',' and use that to change words position in the 2d array i will write from the 1d array. So essentially String[]{"a,b,c","d,e,f"} ought to … |
| | I am trying to figure out where is Java and C# mostly used? I read that enterprises favors Java and JEE, but they don't say anything about JSE. I also read that C# is being used a lot, especially on Windows platforms. But the question remains, what do enterprises use … |
 | I'm trying to make this as easy as possible but I'm stuck. Inside the for loop, if the input entered was not a number or wasn't valid, it moves on, but I don't want it to. I want it to repeat that interation. Is there a possible way to do … |
| | I am now on part 3 of a payroll program for my Java class but I did not add the while loop in last week so I need to figureout what I did wrong so I can do part 3. The program should loop until the user enters "stop" It …  |
| | sir , I have need to start a thread on click of submit button on my jsp page. I am using Java Bean for Codeing. please write small program to start thread on button click of jsp page. Thank you....... |
| | package dmaze2; import java.awt.Dimension; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.table.DefaultTableModel; public class Dmaze2 extends JPanel { JTable jt; ImageIcon Icon = new ImageIcon("x.png"); JTable imagelabel = new JTable(Icon); public Dmaze2() { Object[] columns = {"1","2","3","4","5","6","7","8"}; Object[][] table={{"f","f","f","f","f","f","f","f"}, {"f","f","f","f","f","f","f","f"}, {"f","f","f","f","f","f","f","f"}, {"f","f","f","f","f","f","f","f"}, {"f","f","f","o","f","f","f","f"}, {"f","f","f","f","f","f","f","f"}, {"f","f","f","f","f","f","f","f"}, {"f","f","f","f","f","f","f","f"}}; … |
| | // Convert Celsius to Fahrenheit and vice versa. import java.awt.BorderLayout; import java.awt.FlowLayout; import java.awt.GridLayout; import javax.swing.JTextField; import javax.swing.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; public class ConvertTemp extends JFrame { // instance variables JLabel labelFahr; JLabel labelCels; JTextField textFahr; JTextField textCels; JButton conFahToCel; JButton conCelToFah; public ConvertTemp () { super … |
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 | I was doing my 2nd assignment to create a bank program using Java. I got a problem when I run a few times. For example, I entered the starting amount as $50000. Then, I choose withdraw. I tried to enter withdrawal amount as $5000. Then, I choose to check balance, … |
| | Is there ay inbuilt method to convert 2D array into CSV file? e.g. Can anyone give me a hint to convert [1,2;3,4] into a file output.csv? |
| | some people says that java is not purly oops language like C++.pls suggest me if it is true then why iot is so?  |
| | I am writing a program that will open another form, the user will continue doing stuff on the new form and would then close the form. When and only when this new form closes, the main form should continue with its work and re-enable some components. Here is the code: … |
| | I am trying to read a some data that is stored in an xml file and then print it to the screen for the user. But my program isn't working correctly. Here is my XML document: <UserAccounts> <Account AccountNumber="1234567890"> <Password>12345</Password> <Balance>1024.64</Balance> </Account> </UserAccounts> And here is my code: File fXmlFile … |
| | I have been struggled to solve this problem for few days, i was working on multichat application where in this class i want to send the text to the server and and response in the client side, if anyone can help me i really appreciate from what i known the … |
| | hi: we use system("cls") function in c++ i need a function or a class or any command that i give it in my code that clear my screen plz help me |
 | Hi, I picked up this code on daniweb and am trying to get it further. Here's the class import java.util.*; import javax.swing.*; public class LibraryBook { private String title; private String author; private int pageCount; //contructor for books title, author, page public LibraryBook(String bookTitle, String bookAuthor, int bookpageCount) { title … |
| | This is the last part to my assignment and when I go to compile the last part I come up with 7 errors unsure what it is that it wants me to do. The errors are: C:\Users\Owner\Desktop\week9 part6\Inventory6.java:212: error: illegal escape character strPrice = strPrice.replaceAll("\$", ""); ^ C:\Users\Owner\Desktop\week9 part6\Inventory6.java:270: error: … |
| | I am trying to create a File Searching Utility that finds all Files with a given Name which searches all Folders (Sub Directories, and Sub Directories of Sub Directories) in a given Directory. I was thinking of a way to use For Loops, or For Each, but that would mean … |
 | <script> function a(){ var filename="test.txt"; </script> <img src="img/test.png" title="?"/> How to get the value of "filename" in "title"?  |
 | Hey there good people. well i have implemented the whole code of compiler phase 1. Have implemented al the DFAs and most are working fine. But this comments DFA is giving me grief. What it should do is, it should ignore anything written between { } . but it's not … |
| | How to create a method that takes input string and returns the most frequently occurring letter(s) in string? **Prototype of the function:** public String Duplicate(String str) **Constraints:** 1. If there are two or more letters which are most frequently occuring, then return all possibilities in the output. 2. The input … |
 | i have to find a round trip for an Edinburgh bike club (data below) using two approaches: a) a conventional search algorithm; b) a genetic algorithm What i must do : 1. Produce a program using a search algorithm of your choice that will find a ‘good’ circuit from Edinburgh … |
| | Hi all, I have a multi-threaded program. This program, lets say spawns 10 threads. I would like to update a variable when each thread finishes its job. The reason why I am asking this, is because I would like to show something like progress bar (not really a progress bar, … |
| | I m trying insert multiple rows in same database (each row had many fields) on submit but unable to do so. I m successfully able to insert single row but when it comes for multiple rows I got stuck. This is the jsp page where you take an input to … |
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| | i just learn about single linkedlist and i am trying to create a program. public class linklis { public static void main(String[] args) { LinkedList ab= new LinkedList(); ab.add("1"); ab.add("2"); ab.add("4"); ab.add("7"); System.out.println("the list" + ab); System.out.println("remove 2nd element: " + ab.Delete(2)); System.out.println(" - print linkedlist size: " + ab.size()); … |
| | Hello everyone, I got a small question on encryption, actually I am trying to learn the various techniques to encrypt a message. Now I am trying AES, using the built in security package in Java. The problem is that I am having a problem with this encryption algorithm. Actually I've … |
 | package controller; import dao.CheckDAO; import entity.Users; import java.io.IOException; import java.sql.Date; import java.text.SimpleDateFormat; import java.util.regex.Matcher; import java.util.regex.Pattern; import javax.annotation.Resource; import javax.mail.Message; import javax.mail.MessagingException; import javax.mail.Session; import javax.mail.Transport; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeMessage; import javax.naming.NamingException; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import model.CipherText; import model.UserService; public class … |
| | Can any one convert this Java code to c++? import java.util.*; import java.io.*; public class Test { private static HashMap<String, List<String>> left_map_rights; public static void main(String args[]) throws Exception { left_map_rights = new HashMap<>(); BufferedReader r = new BufferedReader(new FileReader("routes.text")); String line; HashMap<String, Void> lines = new HashMap<>(); while ((line … |
| | I'm trying to create a set of selectable labels, New Game, Load Game, Options, and Exit. I created a MenuItem class which extends Label, and set up the constructor to use the standard stuff expected from a Label. Here is the class. package com.irridium.echo.menu; import com.badlogic.gdx.graphics.Color; import com.badlogic.gdx.scenes.scene2d.ui.Label; /** * …  |
| | there is my question that normally in java we create object with new operator but when we want to use String and String is also a class then we declare object without new operator why plz answer my question |
| | import javax.swing.*; public class BankAccount { //======== fields (attributes, members)====== private String name; private String acctNo; private double balance; private final double MIN_BALANCE = 50; /** initialize all fields as default values */ public BankAccount() { name="N/A"; acctNo="00000"; balance=0; } /** initialize the fields @param n initializes name @param aNo … |
| | Hi to all, It’s one of the question in test, I am confused please someone help. MainClass{ Public static void main(String [] a){ Employee e=new Employee(); for(int i:e){ // Something } Now If I compile this code I will get an error. But without changing for each condition I want … |
| | My code is not compile and run Code is Below import java.util.Scanner; class Input { public static void main(String arg[]) { int rno; System.out.print("Enter Your Name = "); System.in.nextInt(rno); } } i think if System.out.println() is run then upper code should have to run but not run please solve this … |
| | Hello i made a jsf site. Althought the welcome page is normal all the others are domain/faces/pagename.jsf. How i can fix this problem? |
| | Write a java application that uses random-number generation to create sentences. Use four arrays of strings called article, noun, verb and preposition. Create a sentence by selecting a word at random from each array in the following order: article, noun, verb, preposition, article and noun. As each word is picked, … |
| | i have 2 class for example class a and class b. i need the string store at class a pass and use by class b, here is my code for class a and class b. class a public void actionPerformed(ActionEvent arg0) { JFileChooser fileChooser = new JFileChooser(); fileChooser.setFileFilter(new FileNameExtensionFilter("Text Files", … |
| | COME ON I HEARD "YOU CAN SPECIFY WHAT CLASS SHOULD DO,NOT HOW".BUT WITHOUT INTERFACE ,EXTREME JAVA PROJECTS CAN BE MADE!! WHY TO MAKE COMPLICATION USING INTERFACE? |
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