JVM Failed To Initialize
Apr 29, 2014
What's up with this. Just trying to test my hands on java packages, and had this error(by java) after successful compilation:
Error occurred during initialization of VM
java.lang.Error: Properties init: Could not determine current working directory.
at java.lang.System.initProperties(Native Method)
at java.lang.System.initializeSystemClass(System.java :1119)
Main.java
package com.aceix.simplecalc;
import com.aceix.simplecalc.inputhandler.InputHandler;
import com.aceix.simplecalc.mathoperation.MathOperation;
public class Main {
public static void main(String[] args) {
[Code] ....
Any suitable way to accept input from console.
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Aug 5, 2014
I tried to connect oAuth2 with gmail. In command line, no problem. But with Javamail it failed.
The source of the exemple are here : [URL] ....
Last modified is in 2012 then, maybe, this code is obsolete.
In command line it works fine :
Java Code:
openssl s_client -crlf -connect imap.gmail.com:993
A002 AUTHENTICATE XOAUTH2
+
my_token_who_end_with__
Response : A002 OK myaddress@gmail.com ForName Name authenticated (Success) mh_sh_highlight_all('java');
For information :
- it failed with token and refresh token
- here are the logs :
Java Code:
DEBUG: getProvider() returning javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle]
DEBUG IMAPS: mail.imap.fetchsize: 16384
DEBUG IMAPS: mail.imap.ignorebodystructuresize: false
DEBUG IMAPS: mail.imap.statuscachetimeout: 1000
DEBUG IMAPS: mail.imap.appendbuffersize: -1
DEBUG IMAPS: mail.imap.minidletime: 10
[Code] ...........
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May 2, 2015
I'm working on a program where the user inputs song information (name, artist, filesize, duration) which is stored in a database. Once the user adds a song, the details should be stored in the first empty song slot (4 song slots total) and then taken back to the menu interface.
What I'm having trouble with is that I can add the first song fine (song1), but when I try to add another song, the information entered into song1 is gone. I've worked out that this is because every time I call upon the addNewSong() method, I'm creating four Song objects that are brand new with the line:
Song song1 = new Song();
Song song2 = new Song();
Song song3 = new Song();
Song song4 = new Song();
How to fix this problem is where I'm stuck because if I move these lines elsewhere, I get a 'cannot find symbol - variable song1' error.
Here is my code:
public class SongDatabase {
Scanner console = new Scanner(System.in);
public void addNewSong() {
Song song1 = new Song();
Song song2 = new Song();
Song song3 = new Song();
Song song4 = new Song();
if (song1.isEmpty()) {
[code]....
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Nov 13, 2014
Write a program to input a person''s age and salary, if the age is over 32, add $100 if otherwise subtract $500 from salary, finally output the age and new salary here is my code. I am getting a red line underneath the word 'salary' and i would like to know why and why i have to initialize it. and this is what i have tried.
</Scanner scan = new Scanner (System.in);/>
</int age, sum, difference, old_salary, new_salary, salary;/>
</System.out.println("Please enter the person age");/>
</age = scan.nextInt();/>
[code]....
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Jan 21, 2014
Question : What would you do block a user if he fails to login in 3 consecutive attempts ?
My Answer : I will make use of Session object, so that server could identify that all 3 requests came from the same system.
Dont know if i am right .
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May 28, 2014
I am trying to run my program through netbeans and I get a message:
...build-impl.xml:1048 the module has not been deployed.
see the server log for details.
The corresponding line in the xml document is:
<nbdeploy clientUrlPart="${client.urlPart}" debugmode="false" forceRedeploy="${forceRedeploy}"/>
And in the server log there is a long list of comments, the first which looks to be of significance to this issue is:
WARNING [http-apr-8080-exec-57] org.apache.catalina.deploy.NamingResourcesImpl.cle anUp Failed to retrieve JNDI naming context for container [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/transBoard]] so no cleanup was performed for that container
javax.naming.NameNotFoundException: Name [comp/env] is not bound in this Context. Unable to find [comp].
There are others further down the list which might also be significant such as:
SEVERE [http-apr-8080-exec-59] org.apache.catalina.core.ContainerBase.addChildInt ernal ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/transBoard]]
The corresponding line of code for the first warning that I listed is for the DataSource object and I wrote it as follows:
dataSource = (DataSource)
ic.lookup("java:/comp/env/jdbc/trans_board");
I'm pretty sure the issue has something to do with connecting to the database since it ran fine before I added the database related code.
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Apr 2, 2010
Currently my application is on Tomcat5.0.16.I use struts1.2, jstl 1.1 , jsp-api 2.0.I tried to migrate my application from tomcat5.0 to tomcat 6.0.26.I didn't see any issue in deployment but when i tried to access jsp pages i got this exception.
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: /pbuilder/login/legacyLogin.jsp(6,4) Failed to load or instantiate TagLibraryValidator class: org.apache.taglibs.standard.tlv.JstlCoreTLV
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:88)
org.apache.jasper.compiler.Parser.processIncludeDirective(Parser.java:297)
[code]....
i found that jstl1.1 jar didn't have the above mentioned class.I replaced jstl1.1 with jstl1.2 jar.i verified that jstl1.2 jar had JstlCoreTLV calss.but even after this replacement of jar i am facing the same issue.
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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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Jan 10, 2015
I don't get an in code error but when I run this one it crashes at the print line "failed conversion error". I've used this style format in another program and format worked ok, what doesn't it like
public class Commission {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// Calculate Commission and payment due
double subtotal;
double granuity;
double paymentDue;
[Code] ....
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May 29, 2014
I am trying to run my program through netbeans and I get a message: build-impl.xml:1048 the module has not been deployed. see the server log for details.The corresponding line in the xml document is:
<nbdeploy clientUrlPart="${client.urlPart}" debugmode="false" forceRedeploy="${forceRedeploy}"/>
And in the server log there is a long list of comments, the first which looks to be of significance to this issue is:
WARNING [http-apr-8080-exec-57] org.apache.catalina.deploy.NamingResourcesImpl.cleanUp Failed to retrieve JNDI naming context for container [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/transBoard]] so no cleanup was performed for that container
javax.naming.NameNotFoundException: Name [comp/env] is not bound in this Context. Unable to find [comp].
There are others further down the list which might also be significant such as:
SEVERE [http-apr-8080-exec-59] org.apache.catalina.core.ContainerBase.addChildInternal ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/transBoard]]
The corresponding line of code for the first warning that I listed is for the DataSource object and I wrote it as follows:
dataSource = (DataSource)
ic.lookup("java:/comp/env/jdbc/trans_board");
the issue has something to do with connecting to the database since it ran fine before I added the database related code.
update: my server.xml file is as follows:
<?xml version='1.0' encoding='utf-8'?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership.The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
[code]....
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Aug 10, 2014
initialize the min and max to be the first numbers entered, need to improve the code, because if the number entered is < 0 there is an error. but i dont understand how i would initialize to the first number entered, my understanding is tha if the user enters a 5 , then i should initialize to value 5, but i cant anticipate what the user will enter. I could initializa to null, but that still is not the first number entered.
int min = 0;
int max = 0;
int option = JOptionPane.YES_OPTION;
while ( option == JOptionPane.YES_OPTION){
[code]....
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Feb 14, 2015
The problem is to figure out the number of cartons needed to box up the strawberries picked by the farmer and his wife. The farmer picks 8.4 lbs per hour and the wife pick 10.8 pounds per hour. They pick from 8 am until 4Pm (8 hours). You can put 20 pounds per box.I understand the word problem and how to declare and initialize variables. I'm just confused how to display the math into java to solve it.
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Sep 22, 2014
Trying to make me understand when to initialize a string 'null' and when not..??
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Feb 15, 2015
My code compiles successfully, but when executing I never get an output, and then the message: ">Process failed to respond; forcing abrupt termination...". Is there an infinite loop in my ab method, is that why?
public class Test{
boolean ab(String s){
boolean seenAnA=false;
while(true){
if(s.charAt(0)=='a'){
seenAnA=true;
s=s.substring(1);
[Code] ....
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Apr 29, 2014
There are few modules in our application whose performance degrade with time when 50-100 simultaneous users are working on them at a given instance.The memory allocations are taken care of to allow maximum data.My issue to where to start finding the root cause.
I am currenlty using JvisualVM for profiling and finding memory leaks..Do i need to Simualte 50-100 virtual users and start finding the memory leaks with JvisualVM or working with a single user would do ?
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Feb 13, 2014
I tried this:
String[][]f = new String[1][1] {{"Harry"}{"Hairy"}};
I also tried this:
String[][]f = new String[1][1] {{"Harry"},{"Hairy"}};
but I get an error
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Apr 1, 2014
I'm making a card game and have a class I used to assign all my card variables.
However, it's giving me multiple errors and I can't seem to be able to access the variables from my other classes.
Java Code:
package com.summoners.Screen;
class Cards {
public static String[] names;
name = new String[1000];
atk = new int[1000];
[Code] .....
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Oct 21, 2014
A University offers a course that prepares students for the county licensing exam for real estate brokers. Last year, twenty students who completed this course took the exam. The university wants to know how well its students did an exam. You have been asked to write a program to summarize the results. You have been given a list of these 20 students. Next to each is written a1 if the student passed the exam or a2 if the student failed the exam.Your program should analyze the results as follows:
i.Input each test result (i.e., a1 or a2). Display the message Enter result on the screen each time the program requests another test result.
ii.Count the number of test results of each type.
iii.Display a summary of the test results, indicating the number of students who passed and the number who failed.
iv.If more than 15 students passed the exam, output message, Bonus to the instructor
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Aug 18, 2014
Write a program to initialize and display variable size array.
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May 20, 2014
After this problem is fixed, my math game will run. The answer variable is supposed to be equal to the cases in the second switch statement by random but I get errors whenever I try to initialize it this way. I have been writing this program for almost 5 days now and it is finally wrapping up. Why I can't map the answer variable to the second switch statement the way I want to?
package pkgnew;
import java.util.Scanner;
import java.util.Random;
public class New {
public static void main(String args[]) {
//Declare and construct variables
Random randomnum = new Random();
int fnum, snum, answer;
[Code] .....
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Sep 9, 2014
I'm trying to make an array of objects, which I then initialize using objects that I have already created. I have main class, a secondary "Other" class, and a third "Other2" class. In the first Other class, I create three objects of the Other2 class, an object array of the type Other2 , and I then try to add the three objects to the object array, which results in the errors:cannot find symbol: class objectArray, ] expected, identifier expected
here is my code:
Other class
public class Other
{
Other2 object1 = new Other2();
Other2 object2 = new Other2();
Other2 object3 = new Other2();
[code]....
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Oct 3, 2014
Write a program OutCircle.java that declares and initializes three floating-point variables (r, x, y): the first variable represents the radius r of a circle centered at (0,0) and the second and third variables are the coordinates (x, y) of a point in the plane.Your program should print true if the point is outside the circle and false otherwise. Hint: A point is outside the circle when its distance to the center is greater than the radius.
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May 25, 2012
I am trying to use a custom listener to initialize database connection pool (C3P0) on start up and then destroy on context shut down. The reason for that is that I whenever context is shutdown I have a memory leak because initialized connection pool is not being destroyed.
I have a static class called C3P0Utils that deals with connection pool. In my listener in contextInitialized method I have tried at first to init the pool like this :
+public void contextInitialized(ServletContextEvent sce) {+
+try {+
C3P0Utils.newInstance().init();
+} catch (PropertyVetoException ex) {+
Logger.getLogger(DatabaseInit.class.getName()).log(Level.SEVERE, null, ex);
+}+
+}+
I know that object is created. I checked it using jconsole. However it is not accessible with in the application. My second attempt was to regester the pool and then add it to the context and then when I need it read from there.
+public void contextInitialized(ServletContextEvent sce) {+
+try {+
ServletContext ctx=sce.getServletContext();
C3P0Utils.newInstance().init();
ctx.setAttribute("myDataSource", C3P0Utils.newInstance().getDataSource());
+} catch (PropertyVetoException ex) {+
Logger.getLogger(DatabaseInit.class.getName()).log(Level.SEVERE, null, ex);
+}+
+}+
However when I try to red from the context I get nothing. I try to read like this.
+(ComboPooledDataSource)ctx.getAttribute("myDataSource")+
When I print names of all of the attributes in the context I get these attributes.
Context Name
org.apache.tomcat.InstanceManager
org.apache.catalina.jsp_classpath
javax.servlet.context.tempdir
org.apache.catalina.resources
+org.apache.tomcat.JarScanner
+org.apache.jasper.compiler.TldLocationsCache
+org.springframework.web.context.WebApplicationContext.ROOT
Why I can not use anything initialized in the listener.
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