Skip to main content

NOTICE: On Friday Nov 6, Workspaces will be temporarily unavailable for maintenance.

πŸš€ In our NEW AI Bootcamp you'll build a working app in 28 days, no experience required. Free to all subscription levels.

✨ Earn college credits in Cybersecurity, JS, HTML, CSS and Python

Join the Treehouse affiliate program and earn 25% recurring commission! πŸ€‘

  • Treehouse Logo
    • For Individuals
    • For Businesses
    • For Schools
    • For Libraries
    • For Military
    • All Courses
    • Tracks
    • AI Bootcamp
    • College Credit
    • Techdegree Bootcamps
    • Front End Development
    • Full Stack JavaScript
    • Code Adventures
    • Discord
    • Forum
    • Success Stories
    • Treehouse Links
    • 100 Days of Code
    • Explore
    • Career Toolbox
    • Free Treehouse Near Me
    • Affiliates
    • Blog
    • Support
    • About
    • Learn
    • Beginner's Guide to Coding
    • Data Analysis with SQL & Python
    • Front-End Web Development
    • Python Programming Basics
    • Techdegree Bootcamp Overview
    • UX Design Fundamentals
    • AI Tools for Beginners
  • For Individuals For Businesses For Schools For Libraries For Military
  • All Courses Tracks AI Bootcamp College Credit
  • Techdegree Bootcamps Front End Web Development Full Stack JavaScript
  • Code Adventures Discord Forum Success Stories Treehouse Links 100 Days of Code
  • Explore Career Toolbox Free Treehouse Near Me Affiliates Blog Support About
    Learn Beginner's Guide to Coding Data Analysis with SQL & Python Front-End Web Development Python Programming Basics Techdegree Bootcamp Overview UX Design Fundamentals AI Tools for Beginners
  • Sign In
  • Free Trial
Instagram Twitter Facebook YouTube LinkedIn
Loading banner... Start your free trial at Treehouse
    • Newest
      • Newest
      • Active
      • Unanswered
      • Featured
    • All Topics
      • All Topics
      • • General Discussion
      • • AI
      • • APIs
      • • Coding for Kids
      • • College Credit
      • • Computer Science
      • • CSS
      • • Data Analysis
      • • Databases
      • • Design
      • • Development Tools
      • • Digital Literacy
      • • Game Development
      • • Go Language
      • • HTML
      • • Java
      • • JavaScript
      • • Learning Resources
      • • Machine Learning
      • • No-Code
      • • PHP
      • • Professional Growth
      • • Python
      • • Quality Assurance
      • • React
      • • Ruby
      • • Security
      • • Swift
      • • Vibe Coding
  • Dinu Comendant
    Dinu Comendant
    6,049 Points

    My Pomodoro App freezes

    Posted September 22, 2019 9:37am by Dinu Comendant
    Dinu Comendant
    6,049 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    1 Answer

  • <noob />
    <noob />
    17,063 Points

    How excatly we change the background when we are at different attempt kind?, and how the nested buttons works?

    Posted January 17, 2019 7:49pm by <noob />
    <noob />
    17,063 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    4 Answers

  • Pedro Silva
    Pedro Silva
    5,363 Points

    The container in the home.fxml (the vbox that we imported in the Home.java) is a node?

    Posted March 15, 2018 7:32pm by Pedro Silva
    Pedro Silva
    5,363 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    0 Answers

  • annapoff
    annapoff
    13,552 Points

    can't import class, error in home.fxml

    Posted November 21, 2017 11:34pm by annapoff
    annapoff
    13,552 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    1 Answer

  • Roope Jourio
    Roope Jourio
    7,308 Points

    Incompatible types?

    Posted August 2, 2017 8:10pm by Roope Jourio
    Roope Jourio
    7,308 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    3 Answers

  • kalyada leosrisook
    PLUS
    kalyada leosrisook
    Courses Plus Student 17,855 Points

    how do I solve this nullException in main method ?

    Posted March 26, 2017 3:59pm by kalyada leosrisook
    kalyada leosrisook
    Courses Plus Student 17,855 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    0 Answers

  • Araz kuberin
    Araz kuberin
    6,199 Points

    stylesheets="/css/main.css" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml"

    Posted March 10, 2017 12:53pm by Araz kuberin
    Araz kuberin
    6,199 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    0 Answers

  • Christopher Mlalazi
    seal-mask
    .a{fill-rule:evenodd;}techdegree seal-36
    Christopher Mlalazi
    Front End Web Development Techdegree Graduate 17,305 Points

    Why have several pages

    Posted February 2, 2017 9:25am by Christopher Mlalazi
    .a{fill-rule:evenodd;}techdegree seal-36
    Christopher Mlalazi
    Front End Web Development Techdegree Graduate 17,305 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    4 Answers

  • sinan muyesser
    sinan muyesser
    5,942 Points

    Need Help Please. Cannot run main. Exception in Application start method.

    Posted January 30, 2017 10:44pm by sinan muyesser
    sinan muyesser
    5,942 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    2 Answers

  • Konstantinos Pedarakis
    Konstantinos Pedarakis
    21,301 Points

    How .focus class overrides the styles in the container with the id #container?

    Posted January 8, 2017 12:50pm by Konstantinos Pedarakis
    Konstantinos Pedarakis
    21,301 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    1 Answer

  • Iver Band
    Iver Band
    8,389 Points

    Can't recreate expression evaluation when paused at breakpoint.

    Posted December 8, 2016 9:42pm by Iver Band
    Iver Band
    8,389 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    1 Answer

  • Paul Elliott
    Paul Elliott
    2,882 Points

    "Attribute OnAction is not allowed here" is what intelij says for the button

    Posted October 26, 2016 4:51am by Paul Elliott
    Paul Elliott
    2,882 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    3 Answers

  • Jonathan Grieve
    Jonathan Grieve
    91,254 Points

    Problem instantiating a new attempt object.

    Posted September 18, 2016 9:26pm by Jonathan Grieve
    Jonathan Grieve
    91,254 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    2 Answers

  • Sharad Shivmath
    Sharad Shivmath
    14,446 Points

    What is @FXML in the code?

    Posted July 23, 2016 8:12pm by Sharad Shivmath
    Sharad Shivmath
    14,446 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    1 Answer

  • Mojo Waters
    Mojo Waters
    5,748 Points

    Break all grey and prepareAttempt

    Posted July 13, 2016 2:22pm by Mojo Waters
    Mojo Waters
    5,748 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    1 Answer

  • Daniel Paradiso
    PLUS
    Daniel Paradiso
    Courses Plus Student 3,915 Points

    My intelliJ is telling me that the parameters passed into the Attempt constructor are backwards

    Posted May 31, 2016 4:12am by Daniel Paradiso
    Daniel Paradiso
    Courses Plus Student 3,915 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    1 Answer

  • kabir k
    PLUS
    kabir k
    Courses Plus Student 18,036 Points

    My `Evaluate Expression...` tool got grayed out and I can't reuse it

    Posted April 25, 2016 4:43pm by kabir k
    kabir k
    Courses Plus Student 18,036 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    4 Answers

  • Grigorij Schleifer
    Grigorij Schleifer
    10,365 Points

    CanΒ΄t create a package :(

    Posted January 30, 2016 6:20pm by Grigorij Schleifer
    Grigorij Schleifer
    10,365 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    0 Answers

  • Kyle Baker
    Kyle Baker
    1,884 Points

    Confused about "kind" argument in the Pomodoro app example.

    Posted January 17, 2016 8:18am by Kyle Baker
    Kyle Baker
    1,884 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    2 Answers

  • Derek Markman
    Derek Markman
    16,291 Points

    When I debug my Java platform SE binary keeps crashing.

    Posted January 5, 2016 7:23am by Derek Markman
    Derek Markman
    16,291 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    2 Answers

  • Kevin Faust
    Kevin Faust
    15,353 Points

    confused with getStyleClass() and the toString()

    Posted October 1, 2015 3:14am by Kevin Faust
    Kevin Faust
    15,353 Points
    • Java
    • Build a JavaFX Application
    • Build a Pomodoro App
    • Build the State Change Events

    3 Answers

Posting to the forum is only allowed for members with active accounts.
Please sign in or sign up to post.

Techdegree

  • Front End Web Development
  • Full Stack JavaScript
SEE ALL

Tracks

  • Learn to Code for Beginners
  • Beginning Python
  • Beginning SQL
  • Beginning Java
SEE ALL

Courses

  • JavaScript Basics
  • Intro to HTML & CSS
  • Python Basics
  • CSS Layout
SEE ALL

About Us

  • About
  • Blog
  • Community
  • Stories
  • Contact
  • Gift Card

Explore

  • Plans
  • Affiliates
  • Perks
  • Shop
  • Free Treehouse Near Me
  • Treehouse for Libraries
  • Treehouse for Businesses

Treehouse is an online technology education platform founded in 2011. Treehouse offers more than 700 self-paced, video-based courses in web development, programming, data analysis, design, and AI, plus two project-based bootcamp programs in Front End Web Development and Full Stack JavaScript. Individual Treehouse plans start at $25 per month and include a 7-day free trial. Treehouse serves individual learners, businesses, schools, and public libraries. Cardholders at participating U.S. public libraries can use Treehouse for free. Select Treehouse courses, offered with University Pathways International, are recommended for college credit by ACE and NCCRS. Treehouse learners earn digital certificates for completed Tracks.

Terms & Conditions · Privacy · © 2026 Treehouse Island, Inc.
  • Twitter
  • YouTube
  • Facebook
  • LinkedIn
  • Instagram
  • Discord