35,620 Topics
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| | Hello, Thank you for your time! I have an applet where I have two blocks moving: When the program starts: a)The first block is constantly moving with a time delay of 100 ms about the horizontal direction at the top end of the applet (x starts at 0 and is … |
| | the program works the way i want it to except for the inputmismatchexception. import java.io.File; import java.io.IOException; import java.util.Arrays; import java.util.InputMismatchException; import java.util.Scanner; public class Exception { public static void main(String[] args) throws IOException { int num = 100; int tempNum; int index; String[] strArray = new String[num]; int[] numArray …  |
 | I have user login info stored with JPA along with a room. The room has a list of users, the users have a transient field, which is where my problem is coming in. @Entity public class User{ //some other stuff ids and such @Id @GeneratedValue(generator = "increment") @GenericGenerator(name = "increment", … |
| | for(int i-=0; i<firstItems.size(); i++ { table.addCell(String.valueOf(firstItems.get(z))); document.add(table); document.close(); response.addHeader("Content-Disposition", "attachment; filename="test.pdf"); OutputStream out = response.getOutputStream(); baos.writeTo(out); out.flush(); } Hi I got an error stating the document has been closed. You can't add any Elements.  |
| | I have javascript variable as var str = "str"; want to access this value in jsp scrptlet Want to know what r the possible ways? Thanks |
| | Hello buddies! I'm new at Java SE Porgramming with PHP background. I've made a simple app which uses JSON to save some data and I would like to use MySQL database but there was some question for me. 1. If I used MySQL or any database, how much would my … |
| | Hi everyone, Consider below code, package thread; public class Noti5 extends Thread{ Calc c; Noti5(Calc calc){ c = calc; } public void run(){ synchronized(c){ try{ System.out.println("waiting for calculation.."); c.wait(); }catch(Exception e){} System.out.println("Total is.."+c.total); } } public static void main(String[] args) throws InterruptedException { Calc calculator = new Calc(); new Noti5(calculator).start();new … |
| | Hi guys I need help on the code for this problem with using string. Can someone give me the answer to this problem and on how you do it with explanation but most improtantly the answer. Thank you Method unscramble returns a version of String str with each pair of … |
| | //Trevor Potter // Nov. 11,2014 import java.util.*; public class student { public static void main (String [] args) { int[] student= new int [20]; int[] exam1= new int[20]; int[] exam2= new int[20]; int[] exam3= new int[20]; int[] avg= new int[20]; int i=0; Scanner input = new Scanner(System.in); for(i=0; i<=19; i++){ … |
| | Hi, Currently we have legacy system which is build purely using java and runs on jboss. We notice its using a lot of jms and also httpurl connectivity to pass on files. The system basically supports rossetta net framework where it allows file transfers between trading partners. We notice with … |
| | Hello, Thank you for reading my message! I have an applet, where I make two instances of the custom JPanel objects and I add them into two JFrames and display them. Both of these panels have a 10 x 10 grid of buttons and an event handler is added on … |
| | write a algorithm in pseudocode for the procedure: input a person's age and salary. If the age is over 32, then add $1000 to the salary but otherwise subtract $500 from the salary. Finally, output the age and new salary: this is the question: here is the answer well the … |
| | I have a txt file with 5 integers, then from standard input if I entered 1 it will output 10 if I entered 3 it will output 30. I put mine in an array, I just want to know if its possible to not put it in an array and … |
 | To tell the truth. this program isn't mine. I got this from book "Robert Lafore. Data structures and algorithms in java". There are all written in detail and comments how to implement a 2-3-4 tree, but I need to implement a 2-3 tree. It is not present in the book. … |
 | Hello, I am having trouble sorting my array. I have gotten it to read out just the names in ABC order, but I need it to display all of the attributes. I have read several sites trying to figure out how to do it and I keep getting errors. Here … |
| | i need help trying to set a program that will have three arrays one for number of students anothe rfor 3 exams and final the average of all the grades can any one help |
| | Hi guys :) It's my first time posting and I need help with a program I'm supposed to write for school. I have no clue how to do it and could use any information, thank you! Here's the Information: "Ask the user to enter a word. Output the letters in … |
| | Please how do I implement a load balancer for Java RMI servers  |
| | import java.util.*; class Customers { private String name; private int accountno; private String status; private String type; private int currbal; private String Login; private int Pin; public Customers() { this.name = " "; this.accountno = accountno; this.currbal = currbal; } public Customers( String name1, int A, int Bal) { name …  |
| | Dear All, To be brief, have drag and drop leading into a pdf to jpg converter. It was working, now stopped. My thoughts are either; 1) something stuck in computer memory I can not erase (it is calling a pdf with more that allotted pages) 2) I may have a … |
 | Hello, My name is Steven and I am studying for the OCA-JP-SE7 (1Z0-803) exam and I am using Enthuware Test Studio for practice questions. I came across a question that has to do with the arraycopy method and am having some trouble understanding exactly what is happening. Here is the … |
| | hi all, i want to create a full duplex voice communication system that transfer voice in a LAN network i will be greatful for any help that you could provide since i do not know how java deal with voice and how it convert it from analog to digital thanxs … |
 | Dear, All Viewers I need your help guys I need to convert the python Asterisk Gateway Interface (AGI) PHP or Java or Perl Asterisk Gateway Interface (AGI), Please if anyone know about it help me ASAP, I wait for your feedback guys. Thanks here is Code... asterisk.py code is below: … |
| | Hello friends, I have a greeting card website am working on and i need my customization page to be like this http://www.funkypigeon.com/Pages/CustomiseCards.aspx?ProductId=122130 Also to be able to create DIV with a click of a button. Specify the width & height, margin-top & margin-left tec. Pls which software/script/plugin do I need. … |
| | Please help in understanding the requirements. This is how I understand it, first, from standard input (I'm will need to use Scanner) read in 100 integers. 2nd, put all the 100 integers in a file (using printwriter in my case) 3rd, use that file to catch the exceptions (ArrayIndexOutOfBoundsException) Write … |
| | Hey everyone, I;ve implemented SSL to my server using [this guide](https://blogs.oracle.com/lmalventosa/entry/using_the_ssl_tls_based) now when I connect the server it takes some time to initialize now, I assume its setting up stuff, and then when the client connects takes awhile as well (few seconds), I'd assume it works but I want to … |
| | Error : java.lang.String cannot be converted to String import java.util.*; class String String str; String newstr; void inputString() { Scanner sc = new Scanner(System.in); System.out.println("Enter a string:"); str = sc.nextLine(); } void checkFrequency() { int freq = 0; System.out.println("CHARCTER FREQUENCY"); if(str.isUpperCase) { char []sArray = new String[str.length - 1]; for(int … |
| | Heya guys, i have been trying to make this very famous ball game using java swing. although the primary code ihave used is from this link [[Click Here](http://www.edu4java.com/en/game/game6.html)](null)but been trying to modify it to make it look less complex..But everytime i run it it gives me following error: Exception in … |
| | can someone help me or tell me why I am getting these errors. where I have gone wrong again public static void main(String[] args) { Scanner read = new Scanner (System.in); double taxable_income, income, tax, sum; System.out.println("Please enter taxable income"); taxable_income = read.nextDouble(); System.out.println("Please enter income"); income = read.nextDouble(); if(taxable_income … |
| | Hi I have developed some selenium scripts with TestNG and i made it as a runnnable jar file, but when i am executing that its giving me the following error as log4j:WARN No such property [maxBackupIndex] in org.apache.log4j.FileAppend. The below is my log4j.properties file. # Root logger option log4j.rootLogger=INFO, file … |
| | I have a program to write and keep getting syntax error but can't figure out what is the error, can somehelp me out here, any kind of help with it will be greatly appreciated. here is the program and what I have so far. this is the program: Write a … |
| | Hi Iam having some problems with this program, I think its minimal but i don't know how to solve it . THIS IS THE PROGRAM=A teacher gives 5 tests, but averages the four highest scores. An average of 90 or better recieves an A, 80-89a grade of B, 70-79 a … |
| | Hello I am trying to bring label and textfield closer to each other but not getting the right way how to do it, my code is giving output with a big gap between label and textfield & label and passwordfield. I want some help on how can I remove this … |
| | I want to addtiming execution in java code but I don't know how? Here is the code of Bucket sort import java.util.*; public class BucketSort{ public static void sort(int[] a, int maxVal) { int [] bucket=new int[maxVal+1]; for (int i=0; i<bucket.length; i++) { bucket[i]=0; } for (int i=0; i<a.length; i++) … |
| | using Iteration for loop in java what would be the program to run a) 1!+2!+3!+4!+5! b) 1/1!+2/2!+3/3!+4/4!+5/5! c) 1/1!-2/2!+3/3!-4/4!+5/5! |
 | i have the last update of java, but i'm getting some problems with it :( sometimes works other times don't. only in internet explorer works more or less but not on chrome. can anyone explian to me how can i fix the problem? |
| | I'm fairly new to java, so forgive my incompetence. This program is pretty simple, I'm trying to take the string that a user inputs and return the vowels in the string. The error I'm getting is as follows: > VowelsA3.java:16: error: cannot find symbol > if (isVowel(letter) == true) > … |
 | Hi... I really need help in my hw because it will be submetted tommorow . Problem # 2: Write a Java application that test whether a two dimensional array, input by the user, is a magic square. A magic square is an NxN matrix of numbers in which every number …  |
| | hi... Problem # 4: Modify problem 4 in hw6 to record students score in each question and the question shown to the user. For example, Rectangle Red 2/5 means that the student was shown a red rectangle 5 times and he got them correct only two times (attempt count include … |
| | Hi... This is my first post and I really need help in my hw because it will be submetted tommorow. Problem # 1: Write a program that fill two arrays rad[10] and len[10] by random generator (numbers between 0 and 100). rad[] array represents the (radius) of Cylinder, and array … |
| | Hello, I am having trouble with my inventory program. I made the first part last week and thought I did a good job. Come to find out I did not and the feedback I recieved from my instructor was not very helpful. Is there anyone that can help me fix … |
| | I'm trying to list currently online users on a pet project I'm working on. I've found a few ways to do it, but I'm having difficutly getting the one I chose to work properly. The basic idea was to use an HttpSessionBindingListener on the users information to add it to … |
| | Hi I am trying to change the <p id="returnsuccess"></p> to say anything at this point. I have some code it's about a form submission I don't think the PHP part is that important in solving this problem. But I want to know why the code I have doesn't work and … |
| | Hey guys, Just got a quick question ... I am implementing a client GUI, and part of the requirements are that the client is able to start, stop and restart the server. This got me a bit confused since the client connects after the server is running. What I am … |
| | if a gui have 2 text fields and there are 10 buttons(0-9) to input numbers in text fields then how it will choose that which field get input. this i problem in my gui i write 2 methods but not working my code is below public void actionPerformed(ActionEvent e){ if(e.getSource()==b1){ … |
| | Hi, im having trouble to read from the keyboard the number of employees the user wants and in allowing the user to input up to 10 employees. package application; import dataStructures.*; import java.util.Scanner; /* this is the list of employees * */ private LinkedList<String> employeeList; /* constructor */ public TrainingCourses(){ … |
 | Write a program using user-defined methods. Write the following methods: 1. getPrice() which asks the user to input the original price of an item. 2. getDiscount() which asks the user to input the discount rate. The method should return the decimal version of the rate. For example, if the user … |
 | create a program that will calculate the current grade in a classroom. The program should ask for 5 grades as well as the total point value per grade available |
 | A well-known supermarket employs you to develop an inventory control system. You decided implement it by Object Oriented Programming (Java) because of programs written by Java is easy to enhance and maintenance. The system will control the inventory of 3 shops (Shop 1, Shop 2, and Shop 3). The system … |
 | why do most people use brackets in this way when it comes to Java. Pospular IDEs also use this method by default class Test{ public void test(){ } } than this way class Test { public void test() { } } The second method is obviously easier to read. |
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