Many Errors For A Missing File In Stack Trace
Mar 6, 2014
Why do I see many exceptions for one missing file on the stack trace ? My guess is, where ever that file or methof is being called , all of them will throw exceptions. So, where do I find the root exception, first one which is thrown OR the last one ?
java.io.FileNotFoundException: c: emppw.txt (The system cannot find the file specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:120)
at java.util.Scanner.<init>(Scanner.java:636)
at com.rbc.ReportDriverRunner.getPassword(AuditReportDriverRunner.java:39)
[Code] ....
In the above stack trace, "java.io.FileNotFoundException: c: emppw.txt (The system cannot find the file specified)" is the root cause (Assuming there is only one error which causes code to fail) ? Is the first one cause of failure whch then cascades failure of other methods ?
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Mar 19, 2014
I am making a simple mod/hack for a game programmed in Java. I located the .class file I needed and deobfuscated it and then decompiled it. After that I went in and made a very simple adjustment that I wanted to make. Unfortunately I can across a problem when trying to compile the file! The file won't compile because there are errors. The reason there are errors is because this is just one file out of an entire game. I know this my seem weird, but is there some way I can compile the file with the errors.
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Nov 2, 2014
I have recently taken up some java after a period of time learning batch scripting. the issue I have run into is that my build compiled and ran just
fine when invoking from within the netbeans IDE but after that I 'cleaned and built' the jar and the IDE stored it in the directory that I specified while installing.
I went to that folder, double clicked on my gui and go nothing. So then I opened a command prompt did, "java -jar myapp.jar" and got the following of which has me completely lost:
Exception in thread "AWT-EventQueue-0" javax.persistence.PersistenceException: No Persistence provider for EntityManager named
at javax.persistence.Persistence.createEntityManagerF actory(Persistence.java:85)
at javax.persistence.Persistence.createEntityManagerF actory(Persistence.java:54)
at my.numberaddition.NumberAdditionUI.initComponents( NumberAdditionUI.java:31)
at my.numberaddition.NumberAdditionUI.<init>(NumberAd ditionUI.java:18)
[Code] ....
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Dec 1, 2014
I have a file containing a line that starts with professors name followed by the subject name and the semester when it will be taken.I have to Implement Stack to provide input in the file , read the file and then it will ask for a user input of Professor Name and the Semester. The program will determine the subjects taken by the professor and if there is Classes of the same professor in the user provided Semester.
I only know how to read line by line in a text file and not a single string in a file that then will determine the subject taken by that professor and that semester.
here is the text file
Harry Williams | Advanced DBMS | 4
James H. | Computer Networks | 3
Sasha Ben | Artificial Intelligence | 2
Harry Williams | Software Engineering | 3
Palbo Kastro | Formal Languages | 1
Alex W | Advanced SE | 1
James H | Operating System | 3
here is the code I have so far
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
public class Schedule{
public static void main(String[] args) {
try {
File file = new File("Professor.txt");
FileReader fileReader = new FileReader(file);
[code]....
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May 6, 2015
I'm supposed to add characters to a stack and pop them once the adjacent delimiter is read in from a text file. Moreover, program is supposed to print out the incoming text from the file, but stop when the applicable delimiter is not on top of the stack. As in, a '[' doesn't have a ']'.
I've got the program so it can pop and add to the stack correctly, and stops adding at the correct time, but I cant seem to get it to stop printing. I know a switch statement method in another class seems obvious, but I was trying to practice nested loops.
This is the main program:
import java.io.*;
import java.util.Scanner;
import java.io.IOException;
import java.util.Stack;
public class DelimiterChecker {
public static void main(String [] args) throws IOException {
[Code] ......
Moreover, the file I'm reading for is simply:
{
System.out.println(1)
System.out.println(2)
System.out.println(6 <-------------missing delimiter
System.out.println(7)
}
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Apr 1, 2015
Consider the two simple Java classes below:
class Computer {
Computer() {
System.out.println("Constructor of Computer class.");
}
void On() {
System.out.println("PC turning on...");
[Code]...
After the program run, how do I trace (1) which object call which method (2) and how many times?
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Feb 20, 2014
I'm confused on how to provide a trace table with this problem.
int i = 0; int j = 1; int n = 2;
while (i < 10) {i++; n = n + i + j; j++; }
My professor wants us to use iterations as a way to solve it and this was the example given:
int i = 0; int j = 1; int n = 2;
while (i < j) { i ++; j --; n++; }
public static String r43a() {
// START CODE
String answer = "iteration1: i=" + 0 + ", j=" + 1 + ", n=" + 2 ;
answer += "
";
answer += "iteration2: i=" + 1 + ", j=" + 0 + ", n=" + 3 ;
return answer;
// STOP CODE
}
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Mar 31, 2015
Consider the two simple Java classes below:
class Computer {
Computer() {
System.out.println("Constructor of Computer class.");
}
[Code]...
After the program run, how do I trace (1) which object call which method (2) and how many times?
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Sep 9, 2014
I want to trace how many wifi signals are available near some source within some distance in JAVA. How do I do that?
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Apr 1, 2015
Consider the two simple Java classes below:
Java Code:
class Computer {
Computer() {
System.out.println("Constructor of Computer class.");
}
void On() {
System.out.println("PC turning on...");
}
void working() {
[Code] ....
After the program run, how do I trace (1) which object call which method (2) and how many times?
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Apr 1, 2014
I have written the following test program, but I keep getting the same error: Return type for the method is missing.
Java Code:
import javax.swing.*;
import java.awt.*;
public class BUTTONtest {
private JFrame frame;
private JButton btnOK;
private JButton btnStop;
private JButton btnStop1;
[code]....
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Sep 25, 2014
So I'm trying to check if the new coordinates vs original coordinates are diagonal and 1 line further, and if there is a piece there(getNum()) if it's 2 lines further, so I'm trying to return a boolean value then.
so if it's the first if, it returns true, if it's the 2nd it returns true, then I say else for all other scenario's, and return false there, but my compiler says my method is missing a return statement.
public boolean check(int[] d) {
int x,y;
x = loc[0][0];
y = loc[0][1];
int sx = d[0];
int sy = d[1];
[Code] .....
Edit: used a local boolean and returned that after my if's.,
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Apr 19, 2014
When I put this code in throw new IllegalStateOperation("SortType is invalid"); it states that it can't find the symbol IllegalStateOperation. What should I do to initialize the symbol/variable IllegalStateOperation?
Here is the entire code: :
class HairSalon implements Comparable<HairSalon> {
static final int sortByService = 0, sortByPrice = 1, sortByTime = 2;
private String service;
private double price;
private int time;
[code]...
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Nov 20, 2014
This was an example of code that I'm trying to get to work, I swear I took it down just as it was written in class however mine says missing return statement....
Scanner keyb = new Scanner(System.in);
System.out.print("enter rows and columns");
int rows = keyb.nextInt();
int cols = keyb.nextInt();
int[] [] array = new int [rows] [cols];
printArray(array);
[code]....
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Mar 24, 2014
I use :
ResultSet rs = null;
ps_getValue = conn.prepareStatement(s_getValue);
ps_getValue.setString(1, sValue1);
rs = ps_getValue.executeQuery();
Error :
java.sql.SQLException: Missing IN or OUT parameter at index:: 1
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Sep 8, 2014
I am obviously new to programming and Java so I set myself the goal of creating a very simple auto type style of program so it gets the users input and relays it out again but potentially to another window (I am currently testing to notepad). The reason I am trying to make it is because i thought it could be quite simple and I can build on it as a project to make it better.
The issue I am having is that it outputs the first character to the window I am selected (again testing into notepad) but then stops and doesn't output anything else. I tried to figure out what was going on by putting a System.out.println(arr[6]); after the delay method but it just output a line so almost like what I was putting into the array was only storing the first character of the string? I cannot figure out why that would be...
import java.awt.*;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.util.Scanner;
public class MyBot
public static void main(String[] args) throws AWTException {
//initialising robot
Robot r = new Robot();
Scanner input = new Scanner(System.in);
[code]....
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Dec 24, 2014
I am building a java app and i am wanting to color the 6th 8th and 10th columns differently to make them stand out.
// It creates and displays the table
tableEng = new JTable(buildTableModel(rs));
for(int i=0;i < tableEng.getColumnCount();i++){
packColumn(tableEng,i,5);
[code]....
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Mar 31, 2015
I am having an issue with this code. It says that I'm missing the main class.
import java.util.Random;
import java.util.Scanner;
public class Assignment5Hangman
{
public class GetData
{
private Scanner input;
public GetData()
[Code] .....
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Jan 22, 2015
I am trying to compile the arguments program but it is giving missing return statement error. how to correct the error message.
public class Arguments {
public static Void main ( String args[])
{
int count, i=0;
String sdata;
[code]...
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Jul 10, 2014
This is my code
// TODO Auto-generated method stub
File file=new File("D:/input.txt");
java.io.FileInputStream is=new java.io.FileInputStream(file);
int a=is.read();
try {
while((a=is.read())!=-1) {
System.out.print((char)a);
[Code] .....
My text in file is :my birthday Hello World
But in out i see only:y birthday Hello World
Why is first character is missing here?
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May 4, 2014
I am very new to EJB. Started with Session bean demo which was working fine. (created a jar file which had EJB and a WAR file which had servlet). But face some issues when created MDB . (For that also created a JAR file which had EJB and a WAR file which had servlet).
I have used @JMSDestinationDefinitions({
@JMSDestinationDefinition(name = "java:global/jms/mySalutationQueue", interfaceName = "javax.jms.Queue")
}) in servlet and @ActivationConfigProperty(propertyName = "destinationLookup", propertyValue = "java:global/jms/mySalutationQueue") in MDB. I hope that's fine.
I am using WildFly 8 application server in "standalone-full" mode. But while deploying it I got some errors of missing dependencies. Trace of my application server log is as follows:
09:00:28,511 INFO [org.jboss.as.ejb3.deployment.processors.EjbJndiBindingsDeploymentUnitProcessor] (MSC service thread 1-4) JNDI bindings for session bean named Salutation in deployment unit deployment "SalutationProject.war" are as follows:
java:global/SalutationProject/Salutation!packt.Salutation
java:app/SalutationProject/Salutation!packt.Salutation
java:module/Salutation!packt.Salutation
java:global/SalutationProject/Salutation
java:app/SalutationProject/Salutation
java:module/Salutation
[Code] ....
This example is taken from the EJB 3.1 Cookbook's 1st Chapter. I have searched on [URL] .... but didnt get it. Have only used CDI annotations and no xml.
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Jul 21, 2014
import java.util.*; //input from library of routines
public class guessingGame
{
public static void main(String[] args)
{
int sN = 7;
int yourGuess;
int guessCount = 0;
[Code] ....
I'm getting an error that says identifier expected and the compiler points to this as the problem:("Pick a number between 1 and 10");
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Oct 11, 2012
I'm writing a desktop client for simple soap service (axis), and when i create a web-service client lib using netbeans wsimport tool, I don't understand why for that entity :
import javax.persistence.*;
import javax.persistence.Entity;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
import javax.validation.constraints.NotNull;
import org.hibernate.cfg.*;
[Code] ....
My question is why generated artifact doesn't have "overral" property and what i must rewrite to fix that issue ?
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Apr 20, 2014
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.text.*;
public class aaa extends JFrame
{
private JPanel combinationp, np, ap, dp, surgeryp, medicationp, infop; // input = name, address, days
private JLabel namelabel, addresslabel, dayslabel, infolabel;
private JTextField nametf, addresstf, daystf, selectedsurgerytf;
private JButton calcButton;
[Code] .....
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Jul 10, 2014
Currently I try to integrate a JavaFX BarChart into my existing Java application. Therefore I need a BufferedImage of my BarChart, so that I can render that snapshot on a Graphics instance.
I adapted the existing BarChartSample.java (Chart Sample | JavaFX Tutorials and Documentation) and removed all animations. The code itselfs works fine but I identified one problem -> my TickLabels are missing
The TickLabels are visible If I use JDK 1.7u51 but if I change to JDK 1.8u05.... than the stlye of my BarChart will be changed and my tick labels are not visible.
Did I missed something or is that a bug?
using JDK 1.7u51
[URL] .....
using JDK 1.8u05
[URL] .....
My adapted code is the following:
package barchartsample;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;
[Code] .....
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Feb 7, 2015
I have a problem where I have to create random integers from 1 to n + 1. When the array is displayed I have to find the missing integer from the values that are displayed and show that value. I have to use O(n^2) and O(n) operations. I have created this code so far but I cannot figure out how to make my values display n + 1. It is only displaying values 1, 2, 3, 4 and 5 in random order. I also cannot figure out how to find the missing value. I have created a boolean displayed statement but can't determine how to use it in this code.
=Java
import java.util.Random;
public class Task6
{
public static void main(String[] args)
{
int[] numbers = new int[7]; //create array of numbers
Random random = new Random();
boolean displayed = false; //boolean value to determine if number was displayed
[code]....
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