32,199 Topics
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| | Hi! I'm making an app and I need to know how to set position of strings in java. Here is a code: import java.awt.*; import javax.swing.*; public class Draw extends JFrame{ JPanel panel; JLabel string; public Draw(){ super("CO-LERNER"); setSize(300,150); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true); setLocationRelativeTo(null); string = new JLabel("Example"); panel.add(string); add(panel); } }  |
| | Hi. I am learning Java and now stuck in the exceptions chapter. I wrote a code to understand exception. But i am not getting why there is an error saying "Unreachable catch block".Please help me out here. Code is as shown. public class GetException { static int i; public static … |
| | I'm basically wanting to design a java questionaire gui (not on java) basically just a program that holds a bunch of questions and the corresponding correct answers. So the question i would imagine i would make appear on the label and then having four possible answers a b c and …  |
| | Hi! I need a bit of help here. I started a new project and i need to know how to set position of JLabels(strings). Can I just set pixels or use Int x = 300, Int Y = 400?? I realy need help. I will be thankful for all the … |
| | I am beginner to Java , I would like to know is there any Difference between JDK 32 bits and 64 bits? For example in terms of performance or something ?  |
 | /* * In a hypothetical real-estate themed board game, a player rolls two dice to *move their token around the perimeter of the board by the number of squares *shown on the face of the dice. At each spot the player lands, he or she must *take an action, either … |
 | I am relatively new to java and am having trouble using a cardlayout. When I press the button to switch cards I get a nullpointerexception but I do not understand where I could possibly have anything set to null. Any help would be greatly appreciated. This is my error... Exception … |
| | am developing an desktop application ,for that am providing trial licence for 30 days.But if 30 days over ,if we change system date and time ,it will again back to the 30 days trial period ... how to overcome this... |
 | I am trying to retrieve a blob(2) from my newly created embedded database and assign it to the image icon of a jlable (and of course save it back to the database if the image has been changed or altered). I found the following code snippit from another site but … |
| | Write a program that calculates the mileage and/or cost of fuel by asking the user to input two cities. I NEED HELP. MY TEACHER DOESN'T TEACH ME ANYTHING. San Diego, CA and Houston, TX 1473.4 miles Nevada, KY and Alaska, PA 501.1 miles |
 | Good time of day! I'm working on creating an Eulers Method Calculator program. The problem I got stuck on is I don't know how to convert the user's string into a Differential Equation (dy/dx). This is what I have so far: import static java.lang.System.*; import java.util.Scanner; class EulersMethod { public … |
| | I am using the C code with java code in JNI framework (Netbeans).I am getting the following error: Exception in thread "AWT-EventQueue-0" java.lang.UnsatisfiedLinkError: C:\Developers\DLL_Key\MainDLL.dll: %1 is not a valid Win32 application Is there something wrong with my c compiling tools? I am using mingw-builds\x32-4.8.1-posix-dwarf-rev5 |
 | I am a computer science graduate and want to learn web application development. I have learned HTML,CSS and JavaScript. I have knowledge of Oracle and medium knowledge of C++. Now I want to learn a server side scripting language. I am really confused what language should I learn. Personally I …  |
| | Heya all, Right now, i'm working on a small, text-based game, but i'm a bit confused about how to get my coupeling right. at the moment, i have 5 classes: an Item class, an inventory, a player, a room and a 'game' class that loads the game. The game class … |
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| | I`m making a GUI for my java program using Swing Components and Netbeans IDE. My problem is that when loading a frame from another frame then newly loaded frame shows the contents of the old frame when moving mouse over the new frame.Please help me o avoid this.Am using drag … |
| | Hi, I am a novice in .Net. Can anyone please help me by clarifying the below doubts... :cool: How can we include a client side script like Javascript or VBscript in an ASP.Net page? Can we have multiple <script> blocks in ASP.Net page? |
| | Hello All, I would like learn Java from basics as I am not from IT Domain. Its a new platform me but I have some great oppurtunity if I will learn Java. Please let me know the best way to learn Java for Non-IT Domain. Please note that I have …  |
| | Task: Write a program that calculates the mileage and/or cost of fuel by asking the user to input two cities. It only works for two places and not all three, why? How can I put just the name of the location instead of inputting the numbers? package Winterproject; import java.lang.Math; … |
| | Hello all, I am stuck with a nullpointerException at line 41 and 60.Can someone please help me out.any kind of help will be appreciated. Thanks import javax.swing.*; import javax.swing.event.*; import java.awt.Color; import java.awt.*; class calenders extends JFrame { int i=0; int j=0; int k=0; JFrame jf; FlowLayout fl; JPanel jp[]; … |
| | Hi all. Im having trouble getting my menu to work on my window. this is what I have so far as for my code. package sparepartinventory; import java.awt.Dimension; import java.awt.Toolkit; import javax.swing.*; /** * * @author jonathan */ public class SparePartInventory { /** * @param args the command line arguments … |
 | Hello all, I am trying to find all occurences of a letter in a word. If the letter is present in the word, then I save it to a String. For example here is the text: Hello World, my name is godzab. I search the text, and if there is … |
 | Please help me with this, i'm trying to create a domino game (which a project in school) i'm a midway learner of Java Prog, but still i haven't know a lot. My problem is, i'm trying to draw over the background image of my playFrame, but the rectangle does not … |
| | i started learing java reading thinking in java i cam across this java objects do not have same lifetime as primitives an object retains in memory even after its scope until garbage collector detects and releases the memory well whats the lifetime of primitives..?? their memory will be released after … |
 | Ok, so I'm working on a web-project, I connected a custom hanlder to the root Logger in `contextInitialized()` of a ServletContextListener: @Override public void contextInitialized(ServletContextEvent sce) { Logger def = Logger.getLogger(""); Handler hand = new DatabaseLoggingHandler(); hand.setLevel(Level.WARNING); def.addHandler(hand); } which looks like: import java.io.PrintWriter; import java.io.StringWriter; import java.util.logging.LogRecord; import java.util.logging.Logger; … |
| | /* PointOne type objects has three members. Two of type Integer and one of type ThreeD a custom class. PointOneClone method takes an argument of PointOne type and copy every value from his members to arguments members. So the result is a PointOne instance with the exact same values but … |
 | Hello everyone, I just start to study about Java and I need to design a website in Java. I do not know I should create a Java Application project or Java Web or Java EE.... Could you help me to start this? Thank you.  |
| | hi geys , I need ow to return a array string to my method public String[] SearchPort(){ ArrayList<String> arr=new ArrayList<>(); Win32Driver w32Driver= new Win32Driver(); w32Driver.initialize(); port= CommPortIdentifier.getPortIdentifiers(); while(port.hasMoreElements()){ cuport=(CommPortIdentifier) port.nextElement(); if(cuport.getPortType()==CommPortIdentifier.PORT_SERIAL){ // return cuport.getName(); arr.add(cuport.getName()); String[] t=new String[arr.size()]; t=arr.toArray(t); for(String j:t){ return t; } } //System.out.println(cuport.getName()); } String h[]={"noo data … |
 | I have good knowledge of C, and a good knowledge of core Java. Please list out the areas I need to cover for J2EE. There are many technology available in j2ee.. Please tel me which technology is using uptodate.. I have premium account in lynda, vtc, and pluralaight.. There many … |
 | Good day folks. Problem: My program needs to import data from a database and display them in a table then manipulate and display the data in various ways. That bit is solved the next part is where I need help. The program then needs to save locally... 1. the newly … |
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