No Main Classes Found
Dec 6, 2014
Spoiler
import java.applet.*;
import java.awt.*;
public class JhonnyBravo extends Applet {
/**
*
* @param g
*/
@Override
public void paint(Graphics g) {
Color skin = new Color(241, 210, 169);
[Code] .....
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Aug 17, 2014
class DrumKit {
boolean topHat = true;
boolean snare = true;
void playTopHat() {
System.out.println("ding ding da-ding");
[Code] ....
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Jun 19, 2014
Whenever I try to write a file to the disk and then load it within the same Class (if it is even possible) ...
It gives me an error: Could not find the main class: score.Score. Program will exit.
I have tried this with 2 different classes and it works fine? Why that error is appearing.
Code:
package score;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.Scanner;
public class Score {
public static void main(String [] args) throws Exception
[Code] .....
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Apr 17, 2015
I am assigned to create a program "Simpletron" that the only language understands it is Simpletron Machine Language or SML. I figured out the most but I get the message "No main methods, applets, or MIDlets found in file" when compiling the program. I pasted my program so that you can see.
//A Simpletron computer simulator */
import javax.swing.*;
import java.text.DecimalFormat;
import java.awt.*;
import java.awt.event.*;
[code]....
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Apr 17, 2014
How do I call a class within the main. For example, this is what i have in my code right now. I am trying to call the class BlackJackGame.
package blackjack
public class BlackJack {
public BlackJack() {
BlackJackGame();
}
}
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Nov 1, 2014
I was reading the book, "Head First Java" and it was talking about how there may be multiple classes in a large application, but there will be only one main method.how does it work that way? How can you have multiple classes, but only one main method?
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Mar 18, 2014
I have looked over other people code relating to files that are related to my actual studies in class. My teacher hasn't worked on a lot of file problems so I want to gain some understanding on it.
1.) I have this class with variables declared
import java.io.*;
public class FileDisplay {
private String filename;
FileWriter outputfile;
File Inputfile;
I'm aware that having a private variable would not allow that variable to be accessed outside the code. Vice versa, public variable would do that. The FileWriter and the File Inputfile is something I don't understand, especially have them in classes. What is the purpose of them?
2.)
public class FileDisplay {
private String filename;
FileWriter outputfile;
File Inputfile;
[Code] ....
I have made this code here that opens the output and input file. If I make another method, how would I display the text onto that same file. Hard to clarify for me, but in each method do I just keep creating :
FileWriter outputfile=new Filewriter(filename)
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Aug 31, 2014
I use Eclipse IDE
public class Emp {
private String name;
private String jobTitle;
public void setName(String nameIn){
name=nameIn;
[Code] ....
<terminated> TestClass
Exception in thread "main" java.util.NoSuchElementException: No line found
at java.util.Scanner.nextLine(Unknown Source)
at TestClass.payOneEmp(TestClass.java:21)
at TestClass.main(TestClass.java:13)
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Oct 6, 2014
import java.util.Scanner;
public class Arraykey {
public static void main(String[] args) {
System.out.println("Enter array size: ");
Scanner input = new Scanner(System.in);
int size = input.nextInt();
int [] a = new int[size];
for(int i=0 ; i<size ; i++){
[Code] ....
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Apr 18, 2014
How do you call classes within other classes? Or can you only call classes through the main?
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Feb 14, 2015
I'm doing an aggregation exercise that's suppose to find the volume and surface area of a cylinder. What I'm trying to do is pass values from one class, to a second class, and that second class passes values to a third class.
This may be a clearer explanation: The first class is the main program which sends values to the second and third class. The second class is used do calculations for a circle (a pre-existing class from another assignment). The third class grabs the values that the second class calculated and calculates those values with the one that was passed from the first class to the third class. The first class then prints the outcome.
Problem is when the program gets to the third class, it just calculates the value from the first class with the default constructor from the second class. It's like the second class never received the values from the first class. I think I'm missing a step, but I don't what it is.
First Class:
package circle;
import java.util.Scanner;
public class CylinderInput
{
static Scanner in = new Scanner(System.in);
public static void main(String[] args)
{
//user defined variable
[Code]...
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Feb 13, 2014
I have a jar file.and i imported its classes to my program..
let say i have a code
source code is at /home/t_bmf/Java/src
import firstjar.FirstJarPrint;
public class TestJar {
public static void main(String[] args) {
//FirstJarPrint jar = new FirstJarPrint();
}
}
well i have successfully compiled it using command below:
javac -cp ".:/home/t_bmf/Java/lib/FirstJar.jar" -d /home/t_bmf/Java/bin TestJar.java
it means that i don't have any compilation error right?so all classes found properly.But whenever I run the program I always got this error:
java -cp /home/t_bmf/Java/lib/FirstJar/jar:. TestJar
Exception in thread "main" java.lang.NoClassDefFoundError: firstjar/FirstJarPrint
at TestJar.main(TestJar.java:6)
Caused by: java.lang.ClassNotFoundException: firstjar.FirstJarPrint
at java.net.URLClassLoader$1.run(URLClassLoader.java: 202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.j ava:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:3 06)
at sun.misc.Launcher$AppClassLoader.loadClass(Launche r.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:2 47)
... 1 more
I think it has to be no error since i have compiled the program successfully right?if it really didn't find the class, then it must be a compilation error right?
is there something wrong with the way I execute the program?
note: i created the program in UNIX
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Apr 10, 2015
I have an issue trying to read a file. Iam getting a file not found ex, but the file seems to be there.
This is my project
This the code that is loading the file.
Java Code: public GATEApplication(String appPath) {
try {
loadGATEApplication(appPath);
[Code].....
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Nov 21, 2013
I am trying to create executable jar file and I have test.mf file located in the dir from where jar cmd(JavaTest) is executed and also in dir which contains class files (jTest).
C:Users
m2tDesktopJavaTest>jar cvfm JarTest4.jar test.mf jTest
java.io.FileNotFoundException: test.mf (The system cannot find the file specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:120)
at java.io.FileInputStream.<init>(FileInputStream.java:79)
at sun.tools.jar.Main.run(Main.java:150)
[Code] .....
So how can Icreate manifest file and where shall I put it ?
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Apr 14, 2014
I am trying to run a project and i am getting different errors, I know the code is working because i have seen it running, but now i cant even get the app to load up. sometime I get a AndroidManifest cannot be found error and sometimes i get a error like
[2014-04-14 17:28:31 - DatabasePrototype5] Failed to install DatabasePrototype5.apk on device 'emulator-5554!
[2014-04-14 17:28:31 - DatabasePrototype5] (null)
[2014-04-14 17:28:32 - DatabasePrototype5] Launch canceled!
my AndroidManifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.databaseprototype5"
android:versionCode="1"
android:versionName="1.0" >
[Code] ....
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Jan 25, 2014
The code below keeps giving me errors at runtime.
import java.util.*;
import javax.mail.*;
public class SendSmtp
{
public static void main(String [] args)
{
Properties properties = new Properties();
properties.setProperty("mail.smtp.host", "localhost");
Session mailSession = Session.getDefaultInstance(properties, null);
}
}
My intention is to send email locally on a Dovecot SMTP server using Postfix. I compile it with the command:
javac SendSmtp.java -cp /usr/share/java/geronimo-javamail-1.4-spec.jar
and run it with the command:
java SendSmtp
but I keep getting the error message:
Exception in thread "main" java.lang.NoClassDefFoundError: javax/mail/Session
at SendEmail3.main(SendEmail3.java:15)
Caused by: java.lang.ClassNotFoundException: javax.mail.Session
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 1 more
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Oct 29, 2014
I am creating a body mass index calculator and i was wondering how i could make its so that the program resets itself once the BMI has been found....
My code is below...
package bmiCalculatorSource;
import java.util.Scanner;
public class BMICalculator {
public static void main(String[] args) {
final double KilogramsPerPound = 0.453;
final double MetersPerInch = 0.026;
[Code] ....
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Jul 15, 2014
I try to run this query select distinct TRIM(company) from catalog where company != '' order by company asc; and i get an SQL exception that Column company not found.. When i run this query in MySql workbench it works fine?
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Oct 4, 2014
Write a program to calculate sales and visually display. An online Cowboy retailer sells five products whose retail prices are as follows:
Product 1: Cowboy Boots, $74.99
Product 2: Wranglers, $25.99
Product 3: Cowboy Hats, $24.95
Product 4: Chaps, $ 34.89
Product 5: Spurs, $12.50
Write an application that reads the quantity for each product until user has completed their order. Your program should use switch, if, for, while and do while statements to read, calculate and display the total retail value of all pro ducts sold for each user transaction. The user should be able to start a new transaction after the first transaction is completed. The user can make no more than 3 total orders
public class Merchandise {
private int bootsQTY;
private int wranglersQTY;
private int hatsQTY;
private int chapsQTY;
[Code] ....
When I run my program all of my quantities and the total are 0, I have been stuck for a while trying to figure out how to get values assigned to them...
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May 20, 2014
i want to know about to convert speech to text in java..,
i found some articles are released to achieve this target (Speech 2 text) by using the Google Speech API from Google console.
i have already account & using the Map & other API too. But i unable to found the Google Speech API now..,
Sample Link : Speech to Text Library for Processing (STT)
what shall i do to achieve my target..
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Nov 22, 2014
I have written a class that uses a thread and i am getting wierd error message saying no suitable constructor found for Thread(Tunnel) doesn not like this line, Thread lb = new Thread (tunnel);
import java.lang.*;
public class leftBound implements Runnable {
Tunnel tunnel;
public leftBound(Tunnel tunneler) {
tunnel = tunneler;
Thread lb = new Thread(tunnel);
lb.start();
[Code] .....
works fine if i do this though
import java.lang.*;
public class leftBound implements Runnable {
Tunnel tunnel;
public leftBound(Tunnel tunnel) {
this.tunnel = tunnel;
Thread lb = new Thread(this);
lb.start();
[Code] .....
But how do i get it to compile without using "this" method.
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Mar 22, 2015
I started learning mysql to connect my program to a database but every time i try to connect I get this error.
java.sql.SQLException: No suitable driver found for dbms:mysql://localhost:3306/apexdemo
at java.sql.DriverManager.getConnection(DriverManager.java:596)
at java.sql.DriverManager.getConnection(DriverManager.java:215)
at JDBCdemo2.main(JDBCdemo2.java:7)
I did the following:
- added the mysql-connector-java-5.1.34 jar to my classpath
- added mysql jdbc driver to the project library
- double checked the url syntax and spelling errors
- checked that the server is running
import java.sql.*;
public class JDBCdemo2 {
public static void main(String[] args) {
Connection conn = null;
[Code] ....
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Apr 8, 2014
Well I fixed my invalid path problem
Now it is telling me that my file is not found and it is exactly where I put it and told JCreator to look for it.
this is what I get:
javac: file not found: C:Program FilesJavajdk1.8.0docsMyName.java
when I go manually to the address, it is there but for some reason Jcreator cannot find it.
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Apr 10, 2014
I am writing a Twitter app, and I am encountering an error whenever I attempt to find the user's name from a screen name. I get the following error:
04-10 21:43:57.402: W/System.err(9326): No authentication challenges found
Which means that somehow, I'm not logged in. However, I am able to post, get the timeline statuses and even get the User of each status. I simply cannot do this:
public String getUserFromScreenName(String screenName) throws TwitterException {
m_twitter.verifyCredentials();
return m_twitter.showUser(screenName).getName();
}
The m_twitter.verifyCredentials() PASSES, which means I am authenticated, and the following line somehow I am not.
My m_twitter is defined here:
public void authenticate(String token, String secret) {
m_accessToken = token;
m_accessSecret = secret;
ConfigurationBuilder cb = new ConfigurationBuilder();
cb.setOAuthConsumerKey(m_consumerKey)
[Code] .....
And as I said before, I can read/post/retweet and all that stuff both before AND after this call, but this one simply will not work.
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Jun 7, 2013
I tried to develop a sample project with reference to : [URL] .....
When I try to run the client, I get the following error
javax.naming.NameNotFoundException: ejb: not bound
at org.jnp.server.NamingServer.getBinding(NamingServer.java:771)
at org.jnp.server.NamingServer.getBinding(NamingServer.java:779)
at org.jnp.server.NamingServer.getObject(NamingServer.java:785)
at org.jnp.server.NamingServer.lookup(NamingServer.java:396)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[Code] .....
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Feb 20, 2014
I am trying to use hidden variable in project.When I launch my project i am able to get the welcome page.But when submit login values i am getting HTTP 404 error- Resource not found error.
`My home Page/Login Page
<body>
<form action="<%=request.getContextPath() %>/LoginServlet" method="get">
USERNAME<input type="text" name="uname"><br>
PASSWORD<input type="password" name="pass"><br>
<input type="submit" name="submit" value="submit">
My LoginServlet
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
System.out.println("sandeep");
PrintWriter out=response.getWriter();
String userName=request.getParameter("uname");
[code].....
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