I am able to compile the below program but not able to execute.
public class String {
public static void main(String[] agrs){
System.out.println("Hello String");
}
}
Output Error:
Class String does not have a main method
I want to create a java program to find the applications running in my computer. And then I want to select a particular application called 'Harvest Client.exec'. Bring the application to front. And Then find a textbox in it and paste the things from clipboard.
I am not sure how to do this. I started by using some Runtime methods. But I am not getting anywhere.
I am having an issue where the code does something very strange when run. Everything seems to be ok in the code but I don't know what is wrong as no error is given.
Here is the code:
import java.util.Scanner;
public class Pizza {
private static int pizzaSmall = 10;
private static int pizzaMedium = 12;
private static int pizzaLarge = 14;
private static int costPerTopping = 2;
/**@return The total cost of the pizza when given the pizza size and the toppings.*/
[Code] ....
And here is the console output:
Please enter the number of Cheese toppings that you would like: 1
Please enter the number of Pepperoni toppings that you would like: 1
Please enter the number of Ham toppings that you would like: 1
Please enter Small for a Small Pizza, Medium for a Meddium Pizza, and Large for a Large Pizza:
The number of Cheese toppings is 1.
The number of Pepperoni toppings is 1.
The number of Ham toppings is 1.
trying to get my image to show up on my compiled GUI.
Here is my GUI, I just need to know how to get the image to show, where do I save an image file so that it comes up in my GUI.
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Vector;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
[code]...
I'm trying to run a command line executable file using java but there is no output. On the task manager a conhost process opens when the application is run. I've tried
1)try {
Runtime.getRuntime().exec("D: est.exe");
} catch (Exception e) {
e.printStackTrace();
}
2)String[] cmd = { "D: est.exe"};
Process p = Runtime.getRuntime().exec(cmd);
p.waitFor();
and
3)//Runtime.getRuntime().exec("D: est.exe", null, new File("D:"));
same thing happens i.e. nothing happens.
There is a specific function I have added to a program I've been working with for a while which involves retrieving data from a website. Here is that code:
Java Code: public String getWebData(String urlString, String add) throws IOException{
String output = "";
try {
//+s being the token, for example if dictionary.com was being used
add = add.replace(" ", "+s");
urlString = urlString + add;
URL url = new URL(urlString);
InputStream inputStream = url.openStream();
[code]....
Anyway, when I run this program within Netbeans, it works perfectly. I have a backup of the project in eclipse as well, and I've copied all of the code over and tried running the same thing in Eclipse - exactly the same, it works perfectly. The problem is whether I compile the the code in Netbeans or Eclipse, the exported runnable jar for some reason has an issue with this one method. It doesn't crash, and it seems to be doing something, but it is by no means giving me the data from the website like it is supposed to.
Is Java really cross platform programming language?
I compiled a .java file and tested it on linux mint, then I tried to run it on windows vista but it did not run.
The message is: Error: Could not find or load main class myClassName.
The JDK is 8
How can I execute a jar file ?
how can I make such file ?
Will it be executed as an exe file in windows ?
I am making a program, where the user answers 3 questions and then I add the number of correct answers in to the (int) numberofcorrect variable, then I want to print the results, and no matter how many correct, the program executes first the correct if statement, then the else statement.
Eg: I have 2 correct it will print:
"Grade B, 2 of 3 "
"You failed the test"
Why does it do that? How can I change my code so the else statement dosent print if one of the if statments is allready printed?I want to know how to not execute the else statement, if one of the if statements have allready been executed.Below is my current code for this problem:
if (numberofcorrect == 3){
System.out.println("Grade A, full score");}
if (numberofcorrect == 2){
System.out.println("Grade B, 2 of 3 ");}
if (numberofcorrect ==1) {
System.out.println("Grade C, 1 of 3");}
else {
System.out.println("You failed the test"); }
I want to execute my jsp code to compare two dates after every 10 seconds if user enter date and current sys date are equal it will send the mail to the user automatically. Below is my jsp code
this if condition i want to check the date after every 10 seconds and when two dates are equal it will send the mail using below mail code
if(ExpcReDt.compareTo(dateStr)>0) {
out.println("Expected return date is greater than current date");
}
else if(ExpcReDt.compareTo(dateStr)==0)
[code]....
//Main method
public static void main(String args[])throws IOException{
boolean runProgram = true;
Scanner keyboard = new Scanner(System.in);
//runs program while runProgram is true
while (runProgram){
[code].....
I was typing up this program and when I compile it, there aren't any errors, but it won't advance past the second conditional.
Here's the code:
import static java.lang.System.*;
import javax.swing.JOptionPane;
import java.util.*;
public class area51
{
public static void main(String args[])
[Code] ....
The first two answers are 41 and right.
public class Main {
private static void foo(Integer a) {
System.out.println("Integer");
}
private static void foo(long a) {
System.out.println("long");
[Code] ....
This code prints long. Why is that? How did compiler decided that it likes long version of foo() method the most. If I had to guess I'd pick int... or possibly Integer as they are most similiar to what was passed. But why long?
I am unable to run this java mail code, whats the error!!
public class Class1 {
final String senderEmailID = "from@gmail.com";
final String senderPassword = "password";
final String emailSMTPserver = "smtp.gmail.com";
final String emailServerPort = "465";
String receiverEmailID = null;
[Code] ...
I get an error as this
javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 465, response: -1
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1949)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654)
at javax.mail.Service.connect(Service.java:317)
[Code] ....
I want to execute and use the Win7 Speech Recognition with Java. How can I open it?
I tried to open it with "Runtime.getRuntime().exec(" ");" but I couldn't find a command to open it. How can I use the speech recognition once I opened it with commands in Java?
Question : How to execute batch file & .exe file using jsp servlet?I am giving input for blast in the FASTA format. After that i wants to make the sequence.FASTA file in my project folder. And I wants to execute batch file with parameters as blastp.exe file, sequence. FASTA file, database files, output file.
There is no problem in the file creation of sequence.FASTA
ERROR IN: the batch file is not execute, So the I am not able to get the output file for display.
ERROR is : java.io.FileNotFoundException: D:vaibhav_workspace.metadata.pluginsorg.eclipse.wst.server.core mp4wtpwebapps oxin-dataoutputprotein.txt (The system cannot find the file specified)
Technologies Used :JSP,Servlet,Process-builder
I have the following code as :
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out=response.getWriter();
String values=request.getParameter("t1");
ServletContext servletContext = request.getSession().getServletContext();
servletContext = request.getSession().getServletContext();
String path="//sequence.FASTA"; /*file is created in getRealPath()*/
[Code]...
Here the getRealpath() is:
D:workspace.metadata.pluginsorg.eclipse.wst.server.core mp4wtpwebapps oxin-data
My all files in the project folder as toxin-data
There are multiple .CSV files (each file has multiple rows and columns). I need to fetch data from all the files and find MEDIAN of the values for each column and do further calculations. Suppose there are 3 files, i need to find the MEDIAN of column 1 in file1, MEDIAN of column 1 in file2, MEDIAN of column 1 in file3. Below code just fetch data from one file.
package testdatapkg;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
[code]....
I have few queries regarding compiling v/s execution of a java program. Suppose I have a Main Class which is referring to class Test which is present in JarA. Now, at compile time, this jar JarA must be present in classpath/buildpath. So, what actually is the action performed by the compiler by referring to this jar?
Now, at runtime also, this jar should be present to execute the Main class. Is this correct? If yes, then what is the action performed by JRE when it refers to this class at runtime? WOn't all the dependencies be resolved at compile time only?
Any article where it mentions about when the class is loaded into memory?Does it happen before the server starts?
Also does the class needed to be loaded into memory? Can the JVM not just execute the code without storing in memory?
I searched in google. Could not get anything concrete.
How can I time my while loop to executeevery 3 seconds?
Here is my code:
class Info{
public String name;
public String version;
public String arch;
double CPUSpeed;
};
Info info = new Info();
Info[] queue = new Info[100];
[Code]...
I seem to have done it right, but it doesn't work... What is wrong?
In spring there is a Custom Authentication Provider, my question is from a jsf login page how can I execute this provider ?
@Component
public class CustomAuthenticationProvider implements AuthenticationProvider {
@Autowired
private UserService userService;
@Override
public Authentication authenticate(Authentication authentication) throws AuthenticationException {
String username = authentication.getName();
String password = (String) authentication.getCredentials();
[Code] ....
I have a problem with an if statement I've done. I'm not sure how to fix my problem. I'll post the code of the if statement and the output.
if (box = true &&(shippingSwitch ==1))
{
if (ounces < .5)
{
additionalPrice = ((ounces % .5)/(0.0625))*1.25;
shippingPrice = 15.75 + additionalPrice;//((weight / 8)+ (weight % 8));
[Code] ....
Here's the output I get using println to test it.
Please enter 1 if your package is a letter and 2 if your package is a box
2
Please enter weight in pounds (Example: 1.2):
1.2
Please enter your shipping service option:
Press 1 for Next Day Priority:
Press 2 for Next Day Standard:
Press 3 for Two Day Shipping:
1
7.00
If I comment out the else statement on the last line of code I get the following output:
Please enter 1 if your package is a letter and 2 if your package is a box
2
Please enter weight in pounds (Example: 1.2):
1.2
Please enter your shipping service option:
Press 1 for Next Day Priority:
Press 2 for Next Day Standard:
Press 3 for Two Day Shipping:
1
13.75
What I want to happen is the code under the first comment to to execute if true, or go to the code under the next comments and execute if that statement is true and if that is not true I want the last block of code to execute underneath the last comments.
I'm trying to run a ping command but all I manage to do Is open a new cmd window.I'm not sure how to add the ping command to the String[].
import java.io.*;
class callcmd{
public static void main(String[] args){
try {
String[] command={"cmd", "/k","start","ping 192.168.10.9" };
Process process=Runtime.getRuntime().exec(command);
}
catch (IOException e) {
e.printStackTrace();
}
}
}
I need executing shell script from Java program. For example i have start.sh script in /tmp/start.sh folder of unix server. I want to execute shell script from local java code.
View Replies View Relatedhow can i execute the main class into a JButton.
Example: Main Class
public class ComparativoV3{
public void loadComparative(String path){
}
public void compareDbs(){
[Code].....
how to set it up the private void CompareActionPerformed(java.awt.event.ActionEvent evt) as the ComparativeV3 main class, not giving it any argument, because the files are load from the arguments section & it reads diferent files with diferent arguments.
I have the program written correctly, but it won't execute.
public class Welcome {
public static void main(String[] args){
//Display message Welcome to Java! on the console
System.out.println("Welcome to Java");
}
}
I compiled the code as written below with "javac Welcome", and use the "Class" name "Welcome"
The file path is: C:Java Programs
Javac Welcome.java
Java Welcome
Below is the result of the above commands
javac Welcome
Create Process() failed with error code 2:
The system cannot find the file specified.
java Welcome
Process started >>>
Error: Could not find or load main class Welcome
<<< Process finished. (Exit code 1)
I am coding in notepad++