36,051 Topics
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| | I am taking an intro level java programming class and i am a little stuck at the moment. I'm trying to use a the replace method. My objecti with this program is to gather a phrase from the user and then have it print the same phrase with some characters …  |
| | Ok so this is my code so far: I have a issue where near the end in the getSum() method I need a way for the all the methods that i have that ask for the user input need to go into the respective arrays that i made in the … |
| | I am given the amount of data and the time used. It asks for the time complexity. It is in a Big-O packet Below is the first problem given Algorithm A Data Time 1000 .003 2000 .012 4000 .048 8000 .192 Please explain how to get the time complexity. Thanks! |
| | hello. i am a new learner. i build some program that able to read .doc file and pass them to Cache database. i've done the passing part. but the problem is, how can i diffrentiate between paragraph and table content? for example, i have **Section A** as a title and … |
| | Hi,i have a program and i created into a jar file,but the problem is when i am going to remove the jar file into the directory where my java classes and pictures resides,when i click the jar file the picture of my buttons are gone.can you help me please how … |
| | The GUIFlowLayout is giving me some trouble, the GUIFrame works fine. I have copied this from the Java programming book which I am using (Introduction to JAVA, eight edition, by Y. Daniel Liang). I get red error lines under 'setLayout', all of the 'add' words, and all the 'setTitle, setSize' … |
| | I'm do program that when i press by mouse in any cell in table that print the cell position in a text field but i have a problem that's do nothing need help plz note ( I'm use jfram form and drage in it jtable and jtextfield ) [CODE] public … |
| | My Java is pretty rough. So far I've completed one class of Java all the way up to basic array functions. I've asked my Professor to explain it, but he talks with so much jargon. Could someone explain to me why this program spits out the "24" when I run … |
| | Hi frnds!!! Am new to ubuntu .. Am using netbeans7.1 .. I need to connect my java application with mysql server... I dont know how to configure netbeans for that.. I tried to configure mysql server in netbeans itself through (Right Click Databases-> select Register MYSQL Server-> select Admin Properties) …  |
| | Hello again, This time, I want to create a simple function where you choose a date with JSpinner, and next to it, I want a textfield where you can enter the time. I've already created a JSpinner with both date and time, but it kind of looks bad, but that's … |
| | When I run the application my labels are al spaced out, however in the design they are fine. Do you have any ideas why? Also when I preview the jframe everything looks fine. Thank you |
| | private ArrayList<Student> students; public void loadFromFile(String x){ try { FileReader reader = new FileReader(x); Scanner in = new Scanner(reader); int lineNumber = 1; while (in.hasNextLine()) { String name = in.nextLine(); int score = in.nextInt(); students.add (new Student(name, score)); lineNumber++; } in.close(); Hey Guys i am getting unknown errors when trying … |
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| | I am supposed to create an arraylist from an integer[] array, iterating the elements in the list in decending order ex: int[] array = {1,4,2,3,5}; goes into array list to become {5,4,3,2,1} how do i even being to do this (without first sorting the array and then putting it into … |
| | dear all, I am working on hashmap and treemap. At the starting of my program i have declared two map,m1 and temp,both are hashmap. At starting point both map contains same kay value pair. At some instance of program, i want to change the value in temp, remove some key … |
| | What is the component called in a GUI ? I am designing an application where I need to show certain usernames besides along with the points they have scored in a game.I don't want to do it in a table.I want to use the component shown in the picture below.But …  |
| | Hello my question how can I split array of string to another string using for loop for example if i have this array of string joe,DE2300,A sam,RM4901,B allay,SM9800,D << name, course, grade I want to split the array to another array so the output will be //I want this list … |
| | Define an integer array ‘arr’ with size 2 in the main method and initialize the two elements in ‘arr’ to be 1 and 2 Write a method ‘swap’ and pass the ‘arr’ into the method, swap two elements of the ‘arr’ in the method Print out all elements in ‘arr’ … |
| | Hi all, I have come across the class JDatePicker which allows user to pick the date from the calender. But, I actually don't know how to use it. I have searched on the Google but didn't find much helpful information. Can anybody help me on this? Any help(e.g. examples) will … |
| | I need to create a Point and Rectangle class for a homework assignment and I'm unsure if I have the right idea with what im trying to do. In my Point class it much have a accesor and mutator, and also a distance method which is what im haveing trouble … |
| | I'm not sure. This the right way to calculate percentage ? Here's my method public class percent extends Operation { @Override public Value calculate(Value key, Value value) { //BigDecimal result = key.getValue().divide(Value.hundred, Value.SCALE, BigDecimal.ROUND_UP); return new Value((key.getValue().divide(value.getValue()).multiply(Value.hundred))); // return new Value(result); } @Override public String getSymbol() { return "%"; } … |
| | import java.util.Arrays; import java.util.List; import java.util.Random; class DynamicArrayOfInts { private int[] storage; private int size; private final int INITIAL_CAPACITY = 8; private final int GROW_FACTOR = 2; public DynamicArrayOfInts() { storage = new int[INITIAL_CAPACITY]; size = 0; } private void rangeCheck(int index){ } private void ensureCapacity(int size_wanted) { int max_capacity … |
| | Hi all, I am creating one GUI application in java. I need to make menubar visible when particular panel is made invisible. Is it possible by creating an event which will be triggered when panel is made invisible? Can anybody help me? Thanks in advance!!!  |
| | I need to fix the code. Once a war event takes place, no points are assigned however in the next deal whoever wins (be it the player or computer) should get double points. One point for the war and the second point for the next deal that was won as … |
| | Hi, This is my first post, I usually find solution by searching this forums However, I been working on my problem for 6 hours with no solution. Here what I'm trying to do I have a class that extends as JPanle also it implements ActionListener I'm trying to add JScrollPane … |
| | Define a class called ‘twoInt’ with two public integer fields a and b In the constructor of ‘twoInt’, initialize the a and b to be 1 and 2 Create an instance ‘mytwoInt’ in the main method Write a method ‘swap’ (not the method of the class ‘twoInt’) and pass the … |
| | so lets say you finished your program. you made the GUI and it runs fine. so everytime you want to run your program you have to go to python(or what ever you use) lauch it to see your program. my question is what code or what do you have to …  |
| | hi. i have some questions..howtowrite a program that convert numbers to their equivalent words? example. 123 become one hundred twenty-three in 3 different language. |
| | hi, i need help with bubble sort. i am not sure what are variable j and variable sort are for? public static void bubble_sort(int unsorted[]) { int i = 0; int j = 0; int sort = 0; while(sort == 0) { sort = 1; j++; for(i = 0; i … |
| | Ok so i made a game in which a random no. is generated and user have to guess it. The game givesclues like Higher or Lower to user. When a guessed no is found a new jframe opens in a new class gui.class. Now i want to pass the argumets … |
 | Trying to write a for loop to insert buttons into the array. This is the code to create an array that can hold 7 values: JButton[] buttons = new JButton[7]; String[] buttonText = {"Circle", "Square", "Oval", "Smiley", "Swirl", "Start", "Stop"}; This is the for loop I'm not sure about to … |
| | Trying to change the size of the shapes over time. Making them bigger as they move upwards and to the right, and making them smaller as they move downwards and to the left. This is the class that contains the move method: import java.awt.*; import javax.swing.*; import java.util.Random; public class … |
 | Hi :-/ I have a java function that I want to call inside my JSP page. My function has got parameters.Now the problem is I cannot call it using JavaScript and if I put it inside <% %> tags it just executes while loading the webpage itself. I need to … |
| | I had absolutely no clue where to post this but I figured since it crashes on the C++ side, I'd ask here. I have the following code: Java side (Loads My C++ DLL just fine.. Passes it a ByteBuffer so that I can write to that): import java.io.IOException; import java.awt.*; … |
| | Bellow is what i have so far on my assignment. I need some help getting this application working. Thank you for your time! /** General Assignment: Review the grading policy on the CSCI 181 syllabus. The course grade is determined by the weighted average of six components with two possible … |
| | Could someone please give me an idea of why I get a nullPointerException when I run this method in my main program. Every list has a variable, first, to store the address of the first node of the list. I assign current1 to the first node of list1 as a … |
| | String testHTMLContent = testhtml+productlogo; Message message = new MimeMessage(session); message.setFrom(new InternetAddress(usern)); message.setRecipients(Message.RecipientType.TO,InternetAddress.parse(to)); message.setRecipients(Message.RecipientType.CC,InternetAddress.parse(ccaddr)); message.setSubject(sub); //message.setText(body); // setDebugMsg("Attempting to send..."); Transport transport = session.getTransport("smtps"); MimeMultipart mimeMultipart = new MimeMultipart(); MimeBodyPart msgContent = new MimeBodyPart(); msgContent.setContent(testcontent, "text/plain"); mimeMultipart.addBodyPart(msgContent); MimeBodyPart query = new MimeBodyPart(); query.setHeader("Content-Type", "text/plain"); query.setContent(queryString, "text/plain"); mimeMultipart.addBodyPart(query); MimeBodyPart htmlPart = new … |
| | Hi there, What i'm trying to accomplish is: These two methods: f(x : double) : double post: return x integral(og : double, bg : double, step : double) : double post : return (f(og) + f(og+stap) + … + f(bg)) * step So I can call those two in my … |
| | I have an interesting problem. I am working on a method that iterates through a number of simple java arrays stored in an Object array. The goal of this method is to find the smallest array contained within the Object array. Because these collections are stored in an Object array, … |
| | I am working on a program where I am trying to solve a tree structure using the Node function I have to perfomr a arithmetic operation example ((1+2)*3) using a tree structure with left and right child. the complexity being I need to randomly generate the constants as well as … |
| | HI ! could you please help me here? i'm having a problem on marking the books in my library program if it is borrowed or returned? here's where im at, import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.util.*; import java.awt.Color; public class Library { ArrayList<String> bookName = new ArrayList<String>(); {{ … |
| | public class Thread7 implements Runnable { public static void main(String r[]) { Thread t = new Thread(new Thread7()); t.start(); public void run() { System.out.println("C"); System.out.println("D"); } System.out.println("A"); try { t.join(); System.out.println("B"); } catch(Exception e){} } } Query1: On compiling this program I get "illegal start of expression" error pointing to … |
| | THing is I have an assignment where the object is an array, I need to check when it is out of bound. But I dont understand what this statement means? Can you guys help me verify it? > method "private void rangeCheck(int index)": if the value of index is less … |
| | I am having a problem completing this Java program. Basically everything is complete and running correctly except the end (which I cannot figure out the code for). The point of this program is to convert dates from the "Month Day, Year" format to "DD-Mon-YYYY" format and increment the dates by … |
| | Hello everyone. I have this program to write for my college course. I listed the instructions below. The problem I have is the starting point. I don't know where to begin. Would it make sense to have a class called Sports, class called mySports, and then classes such as Basketball..etc … |
 | I got the insert and Delete Data/Row working for my DBMS. The deleteRow method finds the row that contains the same primary key from the database, passed on to the method, and deletes the row. With using the insertRow method, the data I added shows on up on the last … |
| | hello everyone, Ive been trying to alter strings and i am having a very difficult time altering the vlaue after i split them. i understand what i am doing when i split the input(String[] word = phrase.split(" ");), thanks to this site.. and how i am then able to alter … |
 | Whats the best way to port a Java web service to a C# web service? Multiplatform. Thanks  |
| | I'm attempting to use the ObjectOutput/InputStream to write data to a file; I'm fairly certain I've got the out portion but coming back in isnt working as it should, thoughts? public static void writePersistant(ArrayList<PersistantObject> persistantRecords) { try { ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("dataout/population-record.ser")); for (PersistantObject i : persistantRecords) { … |
| | college academic controlling all departments i want new ideas to this project in java. |
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