32,204 Topics
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| | Hello, I'm pretty new to Java and this is my first GUI project, so try to explain like I am 5. I declare a label normally, then I set an Icon into it like this: x=rand.nextInt(4)+1; if (x==1) { computer.changeInfo("Fox McCloud", 500, 250, 100, 100, 65, 25, 15, 110, 35, … |
| | Hello, i am now trying to draw a tree with stars using for loop. I find a code for this but i did not get the logic of the code. Please can anybody explain it to me ? The code is below: public class DrawingTree { public static void main(String[]args) … |
| | i Have a problem with popup list When i type a charactor in jtextfield popup list is show popup but when i press the down arrow its cant select index of popup lists |
 | I am making a simple GUI program in java. In this program I have made a simple jFrame where there is two separate textField, one for user input number(data type: double) and another for square of the input number as answer. What I want is: * The event action to … |
| | hi does nay one know how can i implement the Totally Ordered Multitasking in java |
 | I am running an application in which i am running an audio when it is clicked on image, while audio is being played and i changed the mode from landscape to portrait or from portrait to landscape and click on image, it plays another audio clip i.e. 2 audios are …  |
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 | Hello, thought I'd ask before getting too deep into code to make sure I understand this properly. As described in the Gamma et. al. book the Visitor Pattern looks something like this: interface Visitor{ public void visitX(X x); public void visitY(Y y); public void visitZ(Z z); } interface Visited { …  |
| | hi i tried running the code below as the server: public static void main(String args[]) { DatagramSocket socket = new DatagramSocket(); //construct a datagram socket and binds it to the available port and the localhos byte[] b = new byte[32]; //creates a variable b of type byte DatagramPacket dgram; dgram … |
| | i want to show monthly record on one pagein a jtable, when i press next page button the record in jtable shows the secound months record  |
| | I have a bookstore application, but I cannot show the maximum and minimum and maximum price of the book, in the end the program. Please see my codes below. import java.util.*; public class Book{ public static void main(String args[]){ int numOfBook; double totalCost = 0; String expBookTitle = ""; double … |
| | I want to update the contents of Jtable as shown below when the Jcombobox's item state is chaged in the left panel. but i am not being successful in it .Please help.  when the table no value is changed in the left panel , i want corresponding Jtable … |
| | Okay, so this is my final assignment for a class I am taking. I'm making a Book Library Database that keeps track of all books that are entered and changed, things like that. I figured a useful feature would be saving your data in a text file so that it … |
| | I am trying to choose a string out of 4 strings randomly, and to show this string on the console. How can i do it ? For example, there is a question, if user answers it correctly, then the console will display one of the strings that i chose. I … |
| | Hello, i want to write a program that will help an elementary school student to lean multiplication. For this, i use random object to produce two new positive one-digit integers. For this, i have coded this, but then got confused of the scope issue. Here is the code so far: … |
| | hello, I have a JAVA application for active MQ message receiving.It is based on a observer pattern. When I receive a non persistant message at my on Message functionality, it receives the same message nearly 7 times. I have a GUI where I put the messages. But as the receive … |
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| | I have 3 very simple classes and a question about their inheritance. public class A { int a; A(int a){ this.a = a; } void meetoda(){ System.out.println("a = " + a); } @Override public String toString() { return "A [a=" + a + "]"; } } public class B extends … |
 | hello, is there currently a tool which can convert C# codes to Java (for example to be used in NetBeans)? |
| | Hello All, I'm facing a problem while trying to connect a SIM based modem with laptop USB port by using java. every process is almost done for how to connect. But when I'm running the application its showing the following eror msg. # A fatal error has been detected by … |
| | I use a parser called jsoup to parse html amd store it in a mysql database. The parser reads the files with an input stream. The problam is that some class en id atributes are given with class="". The parser cant find those atributes and returns a blank string. I … |
| | Been working on this for so long I am lost and my mind is mush,lol. On line 106 i have this error (class camera is public, should be declared in a file named `camera.java`) I have a lot of incompatible types required: `java.lang.String found: camera.camera.string errors`. I do not know … |
| | We have a socket connection which receive data from gps devices. The problem now is that we find some of the data coming is corrupted and therefore it disconnect the socket. The issue here we have checked the device logs files all looks fine. The engineer have implemented in C# … |
| | Hello again. I am trying to create a simple code that can compute the average of a set of numbers read in using a scanner. import java.util.Scanner; public class Average { public static void main(String[] args) { double number = 0; double total = 0; int count = 0; Scanner … |
| | I have created my GUI interface in Java and I would like to know how to add information from a pdf file. I would appreciate any help. Thank you in advance |
| | I think they can be used to do the same things, Right ? |
 | I am trying to implement the following method: public void add (String a, b, c, d, e, f,...z) { ... } However, I get a compile time error... What am I doing wrong with this? (The parameter takes 26 strings). |
| | In my Class IntegerSet i hav declared the below method but its not printing when i ran the test public static IntegerSet union(IntegerSet setA, IntegerSet setB){ IntegerSet u = new IntegerSet(); for (int i=0;i <= CAPACITY; i++) if (a[i]==true || setB.a[i]==true) u.a[i]=true; return u; In Testing in main, `System.out.println("The union … |
| | I have problems with my GUI part... I have put all components on the JFrame but I would like to add some backgrounds and decoration. However, when I add background using JLabel. Everything loses its position and they are all ruined... Is there anyway to resolve this? |
| | Hi super cool experts! Big Java noobie here and first time poster, so sorry in advance if this forum isn't for people like me. I'm trying to write a silly math program as my first user input test, but I seem to be getting error with the variables from the … |
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