32,204 Topics
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 | Hi there, I am just beginning to learn java right now, and have a real begeinner question. I ahve read that when you declare a float variable and ssigna value to it the number has to be followed by an "f". What I coudln't find out is why: `var floatNumber … |
| | **Can some one please help me with this ?** import java.util.*; public class Expression{ /* * Strings used for storing expression. */ String s, x; /* * Term evaluator for number literals. */ double term(){ double ans = 0; StringBuffer temp = new StringBuffer(); while( s.length() > 0 && Character.isDigit( … |
| | package hospitalclient; public class Person { static int idnumber= 1500; private String name; private String telephoneno; private char gender; private String nationality; //No Parameter constructor public Person() { name="unassigned"; telephoneno = ""; gender = 'M'; nationality = "Saudi"; } public int getid() { return idnumber; } // Accessor Methods public …  |
| | /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package testelimination3; import java.util.Scanner; /** * * @author Nick */ public class TestElim { public static void main(String[] args){ Scanner input = new Scanner(System.in); System.out.println("Please enter a set of numbers"); int[] … |
| | Abstract—A video copy detection system that is based on content fingerprinting and can be used for video indexing and copyright applications is proposed. The system relies on a fingerprint extraction algorithm followed by a fast approximate search algorithm. The fingerprint extraction algorithm extracts compact content- based signatures from special images … |
| | Ok i made a chat thing for a forum i have but it didn't work but there was a detail box and this came up on it. "Java Plug-in 10.9.2.05 Using JRE version 1.7.0_09-b05 Java HotSpot(TM) Client VM User home directory = C:\Users\Patricia ---------------------------------------------------- c: clear console window f: finalize … |
| | 1. **Remove the words where last character is a capital letter from a given sentence.** |
 | I'm new here and I have an assignment about java that i'm not understand on how to do it.Here is the question: Write a test program that read an integer n and call a method to display a pattern as follows: 1 2 1 3 2 1 4 3 2 … |
| | i have to create a calculator (i'm a 12 year old) for the science fair. on textwrangler when i try to compile it :Expected end of line, etc. but found identifier. here is my code: import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.util.*; public class JavaCalculator extends JFrame { private … |
| | I am writing some code to read some information from a text file. The file is essentially three columns of numbers. The first columns are ints, the second are doubles, and the third is ints. So I have created a tokenizer that goes through line by line and interprets the … |
| | i got a problem to make a program where i should use arrays the problem is in the next part, even though all the for loops are the same in this array `results[4][5] = i; // problem here nothing gets stored` nothing gets stored, so when i run the program … |
 | Hi guys I need some help writing a program where I store information from a textfile into a parallel array. I need to be able to do a multiplication sum with the amount,and an if statement. Here is the textfile James 550 Quinton 410 Liam 120 Taylor 600 Jake 270 … |
| | Please can anyone help me with a simple sample on how to populate JCombobox with data(mysql etc) using Java persistence (JPA). I am quite new to this component so I desperately need help with this. |
| | Ideally my program should work like this... Upon button click a random message (out of 3 messages) is appended to a text area(or pane, etc). One message should display blue, one green and one red. Currently I am using JTextPane. I have figured out how to append text easily but … |
 | Hey I'm having trouble with a HW assignment, no need to give me the answer out right but any help would be appreciated! I'm just trying to search a linked list and find a node then delete it. Here is what I have so far: void deleteSong() { char deleteMe[sz]; … |
| | I need urgently your help. Anyone can help how to Write a Java GUI program that accepts three user inputs (use text fields) with three check boxes. The check boxes determine whether the area, circumference and/or the volume of a circle/sphere is/are calculated. If only one check box is selected, … |
| | I want to know if this is correct for what they are asking. If I try to put 7.5% in the `int=` spot it errors. I am a newbie who doesn't quite understand it all. The commission rate in the firstmethod will be entered as a decimal value (for example, … |
| | Write A Program With A Method Name PrintFactors That Accepts An Integer As Its Parameter And Uses Fencepost Loops To Print The Factors Of That Number Separated By The Word "and" |
| | Hi i gotta display 2 arrays on screen but they don't look good i was wondering how can i make it look like this: Speed 20 88 75 80 68 77 81 Focus 30 90 77 83 71 84 85 Jetta 40 94 80 85 76 91 90 Contour 50 … |
| | Hello Members, I have a program (from Deitel Java Solution Manual) which bounces a ball using a Java thread inside a JPanel(which is inside a JFrame). When I made a custom class for the ball, the program is not painting anything on the JPanel.I would appreciate any help. Following are … |
| | Hi, I wanted to know how I can add data to an ArrayList if the collection is not: `Private ArrayList<String> files;` and instead: `Private ArrayList<People> files`. Would the code look like this: public void addPerson(String name){ files.add(name); } or: public void addPerson(String name) { People people; // Declare an object … |
| | Hello, I am making a authentication software, and this is the code for the Username panel. import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.util.Scanner; import java.util.ArrayList; import java.io.*; public class Username { private static String username; private static char[] actualUsername; public Username () { final JFrame frame = new JFrame("Username"); … |
| | Hello, I am making a Banking System, and this is the code for main. import static java.lang.System.out; public class BankSystem { public static void main (String[] args) { new username(); Password.setPassword("1234567"); new Password(); } } However, the problem is that both the username frame and password frame appears together. How … |
| | I have a requirement where value of one field in an object will be determined dynamically using a configurable table. For example, suppose I have the following table - Pk | Reference_column ---------------------- 1 | TAB_REF.AMOUNT where TAB_REF is a reference table and AMOUNT is one of the column of … |
| | Hi everyone, I was writing a program to show visually some vectors I was implementing with Java but I ran into an issue. My program has 3 classes, a driver, a Vector class and a VectorDisplay. The driver and vector class are self explanatory, but here is the code. Driver: … |
| | Hello, I am writing a Java applet which uses the JExcel API to write to an Excel file. I have pasted the run-time error that I get below. After some research about the Exception, I added a policy entry using the policytool command for any Java program by selecting CodeBase<ALL>. … |
 | Hello perhaps you could help me with a problem please. I wish to display a table of results using a JTable. Customarily I use a 2D Object array which is initialized with the data in a manner as follows: public Object[][] data={ {"Biology",25},{"Additional Math", 54},{"Geography",43},{"History",21},{"Spanish", 47}, {"Information Tech.",110},{"Technical Drawing",54},{"French",45},{"Physics",76},{"Chemistry",76}, {"Principles … |
| | how do i check if a menu item in my JMenuBar has been clicked? for instance, i have a JMenu with an item called exit, which i need to make close the form. how do i do this? import javax.swing.*; public class selector_form extends JFrame { /** * */ private …  |
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| | I am working on a java project for school. I am trying to think more into a professional mindset rather than a student. The project I am working on is about hashing. The rest of the project looks really good, but this part makes me wonder if a professional programmer … |
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