32,204 Topics
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| | Hey guys. I am trying to write a programme (not using scanner class) which prints the smallest number in an external text file called README.txt. Anyway I included some explanation of what I am doing so hopefully it's clear. What this programme prints is 0.0, which is not even a …  |
| | How can I store a number with 10^6 digits in Java? Would BigInteger be the most appropriate while considering performance issues like memory and speed |
 | Oh. btw admin! sorry about my earlier thread. i promise not to do something like that ever again :) anyway. i was having trouble with my project and its about Multiplication with loops. i started with a few codes and im really frustrated with what im doing now. please let … |
| | I need to generate 500 random numbers from 200 to 1200 and use insertion to sort them. This is probaly simple for you guys but im confused. My problem is when i run the program all I get is 500 0's. Anyone help me out? [CODE]public class insertion{ public static … |
| | need help ... i need to have a java code for the feistel block cipher .. i know you can help me ... ' please .. :p -- thank you in advance /..  |
| | Hello, I have just started in a java class and having trouble with first assignment. Our first assignment was to enter into Notepad++ and enter a java program provided to us. I did this and saved the program as Quiz1.java. The next step was to compile the file using the … |
| | hello,i am using MS-access db and java code.i want to insert values in a particular row based on selected serial no. and i use statement [code] try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); Connection con2=DriverManager.getConnection("jdbc:odbc:ResumeDSN"); Statement stat1=con2.createStatement(); Statement stat2=con2.createStatement(); stu = new Student(); String Fir6=pers.tname.getText(); if(Fir6.equals("")==true){Fir6=" ";} String Sec6=pers.tdob.getText(); if(Sec6.equals("")==true){Sec6=" ";} String Thir6=pers.tfather.getText(); if(Thir6.equals("")==true){Thir6=" … |
| | Ive written these two methods but they are giving me lots of problems. [CODE]public int indexOf(Object element) 128 { 129 for(int i = 0; i < list.length; i++) 130 { 131 if(list[i] != null && list[i].equals(element)) 132 { 133 return i; 134 } 135 } 136 137 throw new IndexOutOfBoundsException(); …  |
| | How can i write a java program that will read the radius and height of a cylinder and compute the volume using the formulas Area= raduis*raduis*3.14159 and Volume= area*height, and have the program report the area of the bottom of the cylinder and the voulme of the cylinder. |
| | Guys please help me make a simple code for this!! |
| | Can you explain to me what's the meaning of the algorithm of SHA-1? ========================================================================== [CODE]package Finals; import java.io.UnsupportedEncodingException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; public class SHA { private static String convertToHex(byte[] data) { StringBuffer buf = new StringBuffer(); for (int i = 0; i < data.length; i++) { int halfbyte = …  |
| | Hello, I was asked to write a program that starts with a JFileChooser, the user is asked to choose a file. If at anytime during any part of this program, the user hits "cancel" or "yes" when the dialog shows "do you want to continue?" the program will return back … |
| | Ok thank you for that explanations, but now I have an issue with my code. My remove function doesn't see to be working. Now I think it has to do with the fact it is not setting that CDs information back to empty or 0. Also it only stores 1 … |
| | I am a student and we are working on a project in Access database but in windows. When I go back home I tried to run and edit the project but it didn't work. Notice that I don't have Access installed on my mac. My questions: 1- do I have …  |
 | i have the code below, i want to use a switch-case to check the grade of the student, my problem is that the compiler tells me that swithc only takes intergers as arguments. i had thought i cud have a statement like case a > b where a and b … |
| | I'm writing an indexOf method for a class called BasicArrayList. i have two private instance variables an Object[] called list, and an int called size. [CODE]public int indexOf(Object element) 67 { 68 for(int i = 0; i < size; i++) 69 { 70 if(list[i].equals(element)) 71 { 72 return i; 73 … |
| | I have to deal with a program on arrays doing different things with such as finding out if the row contains a number in the first n rows, put all the numbers listed in the arrays without repeating numbers that are listed twice, finding numbers that are in common and … |
| | I am a new programmer in Java and while programming I faced the following problem. I am trying to use switch statement on String but it gives compilation error. If any one suggest me how to use String in switch-case statement , it will be helpful to me. |
| | Hello I have a small problem with JList in external class file_tree. What should I add, write to show this JList in panel controlArea ? My application have a few files Core and two external classes. Code below This is Core File [CODE] import javax.swing.*; import javax.swing.JFrame.*; import java.awt.event.*; import … |
| | Hey everyone, I am having difficulty parsing digits in java. By that I mean that I am trying to make a program print out the number of bills the user recieves when he/she recieves change after there payment, (Cash register). Here is the code i've created to do this for … |
| | I have an assignment for school...Write a program CurrencyCOnverter that asks the user to enter today's price of one dollar in euro. THen the program reads U.S. dollar values and converts each to euro values. I have the following code. It works great until I start putting the loops and … |
| | I'm having issues with the abstract class idea...I've attempted to use Eclipse, but this time the IDE is just messing it up. I've got the files uploaded. They should be attempted to be compiled as this 1. Container 2. Base Container 3. Height, and color exception 4. Round and square … |
| | ...Hello! Can Some One Please Help Me... I need help for my programming project...really need ASAP.,.tnx.,. [B]A. Control Structures (15 pts each) 2. Create a program that accepts a whole number which will dictate the layers of your Pascal’s triangle and displays the corresponding Pascal’s triangle. For example the user … |
| | how to free memory of byte array... code[CODE]for(int j=0;j<count;j++){ buffer=null; //[COLOR="Red"]free the memory by set as a null but not working????? shows array index out of bound exception for the second time[/COLOR] buffer= new byte[size]; //byte mem alloc temp2=di.read(buffer,total,size);// read buffer total=total+temp2; fo=null; ds=null; fo= new FileOutputStream(flist[j]); ds= new DataOutputStream(fo); … |
 | i just met up a problem with array. [CODE] int[] num = new int[10]; [/CODE] this is everytime we declare and intialization one, how about to declare and intializate with unkown size?  |
 | Hi, We are using AD 2003 server x64. Created new certificate, exported it into a file and using a simple LDAP Browser or a java code when we try to bind through SSL it fails and we are getting an error called SSL handshake failed: Simple bind failed. Please help … |
| | I am not sure whether I am placing a Q in the correct section or not. let me give the scenaria I have the xml tag infos [CODE]<credentials> <userId>raj</userid> <password>raj</password> </credentials>[/CODE] i wanted to give this info to logger,(ie) [CODE]log.append(taginfo);//taginfo will be having this credentials[/CODE] Now i want to remove … |
 | Hi, i have eclipse indigo 3.7.1 and running xampp 1.7.4 with the tomcat plugin. I followed the tutorial at [URL="http://www.vogella.de/articles/EclipseWTP/article.html"]http://www.vogella.de/articles/EclipseWTP/article.html[/URL] and all went well till i reached the jsp/servlet tutorial where i keep getting a HTTP 404 error saying "[B]de.vogella.wtp.jsp.controller[/B]" is unavailable, preventing me from navigating amongst the pages. Thanks. |
| | i'm trying to write a game that show a background and a player on screen simultaneously using 2 different classes. here are the relevant parts of the program, or at least i think [code]public WorkingTitle2(){ super("Working Title"); setSize(550,429); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); loadPictures(); loadSounds(); pp = new PaintP(); pb = new PaintB(); add(pb); … |
| | Okay here is my question, I have an text file file which looks like this BASKETBALL John Jacob 58% 15points FOOTBALL Jason Smith 24% 1touchdown BASKETBALL Mark Ramos 23% 25points BASEBALL Isaac David 10% 2 homeruns FOOTBALL David Sarlo 10% 0 touchdowns I am attempting to take a list like … |
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