32,204 Topics
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| | My program is a math game which consists of different levels and different math operations. I'm not completely finished yet but I would like to know if there is a way to put the code for each of the four operators into their own method, and just have the main …  |
| | i have a problem in logic of swapping in java. That is how to swap no. of buttons with mouse click i am not getting the proper code for that..,please, can anybody there 2 help me out..! thnks |
 | Hey there, I am getting used to Java, but here is something that is stumping me: // Fig. 3.10: GradeBook.java // GradeBook class with a constructor to initialize the course name. public class GradeBook { private String courseName; // course name for this GradeBook // constructor initializes courseName with String …  |
| | Hello all, I have defined 3 classes with their attributes including their unique ID. The relationship between these objcts are hirarchical. For example, I have school, class, and students. At the begining of the simulation I create the school and number of classes and put students in the classes and … |
| | In the conversion process of a java to c# project, i have come to java's ***indexOf()*** function in ***string.java*** class, which takes in two integers (int ch, int fromIndex) and return some integer value for a char (i'm guessing its an ASCII value). I need to know if there is … |
 | Ok, I am trying to build a jar file and I cannot seem to find my way around. I have attached an image to this thread to show my directory structure. Now, I am navigating to my MultiProjectManagement directory and creating my manifest.txt file with: echo Main-Class: multi.project.management.panels.ProjectListPanel > manifest.txt … |
| | Hello everyone! Just as the title suggests, i would like to know if it's possible to set the position of a dialog box. The default behaviour, is to appear in the center of the screen I use it this way : public static int confirmationBox(String infoMessage, String location) { int … |
| | retrive data from database using struts 2 and display using dojo tags  |
 | I developed a client server based java networking Instant Messaging app. The client program is needed to be run on the client computer whereas the server program is on server computer. This works in my local wi-fi network(Home network). But i want this one to deploy on internet using some … |
| | Hi, I need some help on this how can i use the arrow keys(up,down,left and right) in the keyboard so that the filloval will move, I have no idea on this.can you help me on this please. Thank you in advance. import java.util.*; import java.awt.*; import javax.swing.*; import java.awt.event.*; public … |
| | Hello Fellow Members, I am currently developing a java program that remotely access a desktop(different network), the reason is the program I am curretly working will delete some of the temp logs that are generated with some other validations. Below are some of the information that might help you in … |
| | hi, I have to write my output of a java program to a txt file. how to do this in java thanks |
| | I found many programmers using PrintStream in their codes. I looked for this,but failed to get the clear idea of its significance,Why to use it? "Unlike other output streams, a PrintStream never throws an IOException and the data is flushed to a file automatically i.e. the flush method is automatically … |
| | I added a string into an arraylist, but when i want to retrieve it, it does not go into if conditional in the code below: ArrayList a=new ArrayList(); a.add("12"); System.out.println(Integer.toString(1)+","+Integer.toString(2)); if((Integer.toString(1)+Integer.toString(2))==a.get(0)){ System.out.println("this is working here"); } What is the problem here? |
| | I am currently converting a Java library to C# .Net, please help me to find if there are C# equivalents of the following java specifics: * RuntimeException() * IllegalStateException() * StringBuffer Any resource on Java to C# conversion will be very helpful. Thanks in advance. |
| | Hi Friends, I have been assigned a java based project. First based on environment variable values for any type of file extension such as .txt, .doc, .pdf etc. Example: FILE_EXT = .txt If FILE_EXT .txt then all .txt files in folders sub folders with should run a specific commands (such … |
| | i tried running my first java program on winows 8 but it didnt display hello world instead it wrote something like a problem to do with "main"and also the red buttons.i am using eclipse,jre is my compiler |
| | Hello, I am using Itext to create reports, I have created the layout which includes a table. try{ Document doc = new Document(); PdfWriter.getInstance(doc, new FileOutputStream("Products.pdf")); doc.open(); Image image = Image.getInstance("logo.png"); //doc.add(new Paragraph("image")); doc.add(image); doc.add(new Paragraph("Registration",FontFactory.getFont(FontFactory.TIMES_ROMAN,18,Font.BOLD,BaseColor.RED))); doc.add(new Paragraph(new Date().toString())); doc.add(new Paragraph("------------------------------------------------------------------")); PdfPTable table = new PdfPTable(2); PdfPCell cell = new … |
 | Hello, I have started picking up on encrytion, and I seem to have an error when I run the program. Here is the error: Exception in thread "main" java.security.NoSuchAlgorithmException: Cannot find any provider supporting ES/ECB/PKCS5Padding at javax.crypto.Cipher.getInstance(Cipher.java:453) at GenerateKey.encrypt(GenerateKey.java:41) at GenerateKey.<init>(GenerateKey.java:24) at GenerateKey.main(GenerateKey.java:71) Here is my GenerateKey class: import java.io.IOException; … |
| | Hi.. I need some inputs on the below. I am trying to write a program which will help me find the number of objects eligible for garbage collection at any given point of time. How do i do this? Any suggestions?  |
| | Hi everyone, I'm stuck making a Scroll pane to see all the bar graphs created when they do not fit on screen, or when the frame is diminished. Can anyone tell me how to do this please? Thanks import javax.swing.JFrame; import javax.swing.JOptionPane; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import java.awt.*; … |
| | can you help me with the code for that using the logic: 1) randomly select the start point 2) predetermine the distance you need that car to travel using nextGaussian() 3) identify all the end points that are that distance away 4) randomly select one as you can see, i … |
 | I have two JTrees that I want to display the same content on them. I set a ScrollPane to each one and wrote this code: sourceScroll.setViewportView(sourceBuildTree); targetScroll.setViewportView(sourceBuildTree); //I want to set the same tree. sourceScroll is the scroll pane of the first JTree, and targetScroll is the scroll pane of … |
| | I tries to install a wizard for web references in eclipse, i found these plugins: org.apache.axis.wsdl2java.eclipse_1.1.0. and org.apache.axis_1.1 and when I am trying to add a web reference i get an error message: The selected wizard could not be started. Plug-in "org.apache.axis.wsdl2java.eclipse" was unable to instantiate class "org.apache.axis.wsdl2java.eclipse.wizards.WebReferenceImportWizard". org/eclipse/core/internal/utils/Assert guys … |
| | Hi, I havea simulation in which cars are moving. The point is that a car has a start point (coordinates x and y) and an end point (coordinates x1 and y1). I'd like to make sure that the distances that the cars need to travel are following a gaussian distribution … |
 | HI Coud you please explain this programme , step by step , i can`t understand it`s method import java.util.Scanner; public class Ex5_4 { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("Enter an integer: "); int x = input.nextInt(); int y = reverse(x); System.out.println("The reverse of " … |
| | Hello, I have one method for checking fields entered, if they are consistent enough then I am inserting into the database. Another on to check duplicates: //check fields and if alright insert in table public void checkFields(String a, String b, String c, String d){ if(a.length() >= 4 && b.length() >= … |
| | hey i'm trying to generate numbers from 1 to 3 in a way such that number 1 has the probability 70% being generated number 2 has the probability of 20% of being generated number 3 has the probability of 10% of being generated how do i do that?? can anyone … |
| | While copying a code snippet from some sites and pdf,docs line numbers are also getting copied.I have to omit those line numbers in my text editor manually always. Any better way so that line numbers won't be copied?  |
| | Hi everyone, Does anyone have an idea of how to skip a line in a JTextField? In System.out.println, I would normally type n but it didn't work for me when I used it in a textfield: text1.setText(**"n"**+coloumn[counter]); where the output displays well as desired excpet that it doesn't skip a … |
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