🤑 Join the Treehouse affiliate program and earn 25% commission!

Join our Live Career-Building Workshop: Fast-Track Your Tech Career Without a Degree! ⭐ Register here!

🌟 Dreaming of a bright future? 🎓 Ask about the Treehouse Scholarship program! 🚀

Curious which AI tools Treehouse developers love? ⚙️ Check them out!

🫡 Treehouse for Military offers discounts to Veterans, service members and their families!

  • Treehouse Logo
  • Plans
    Chevron
    • For Individuals
    • For Businesses
    • For Schools
    • For Libraries
    • For Military
  • Library
    Chevron
    • All Courses
    • Tracks
  • Techdegree
    Chevron
    • Overview
    • Front End Development
    • Full Stack JavaScript
    • Data Analysis
    • UX Design
    • Python
  • Community
    Chevron
    • 100 Days of Code
    • Live Sessions
    • Code Adventures
    • Discord
    • Forum
    • Success Stories
    • Treehouse Links
  • Resources
    Chevron
    • Career Toolbox
    • CodeForward
    • Free Treehouse Near Me
    • Jobs
    • Blog
    • Support
    • About
  • For Individuals For Businesses For Schools For Libraries For Military
  • All Courses Tracks
  • Overview Front End Web Development Full Stack JavaScript Python Development Data Analysis UX Design
  • 100 Days of Code Live Sessions Code Adventures Discord Forum Success Stories Treehouse Links
  • Career Toolbox CodeForward Free Treehouse Near Me Jobs Blog Support About
  • Sign In
  • Free Trial
Instagram Twitter Facebook YouTube LinkedIn
    • Newest
      • Newest
      • Active
      • Unanswered
      • Featured
    • All Topics
      • All Topics
      • • General Discussion
      • • 21st Century Skills
      • • AI
      • • Android
      • • APIs
      • • Business
      • • C#
      • • Computer Science
      • • CSS
      • • Data Analysis
      • • Databases
      • • Design
      • • Development Tools
      • • Digital Literacy
      • • Equity, Diversity, and Inclusion (EDI)
      • • Go Language
      • • HTML
      • • Java
      • • JavaScript
      • • Learning Resources
      • • Machine Learning
      • • PHP
      • • Python
      • • Quality Assurance
      • • React
      • • Ruby
      • • Security
  • michael lee
    michael lee
    5,179 Points

    What am I doing wrong?

    Posted January 17, 2019 4:07am by michael lee
    michael lee
    5,179 Points
    • Java
    • Java Data Structures
    • Exploring the Java Collection Framework
    • Upgrade Comparable to use Generics

    1 Answer

  • romeo draven
    romeo draven
    3,723 Points

    Upgrade comparables challenge

    Posted October 15, 2018 9:55am by romeo draven
    romeo draven
    3,723 Points
    • Java
    • Java Data Structures
    • Exploring the Java Collection Framework
    • Upgrade Comparable to use Generics

    1 Answer

  • Ashmit Pathak
    Ashmit Pathak
    4,441 Points

    i'cant understand what's going on

    Posted April 24, 2018 11:28am by Ashmit Pathak
    Ashmit Pathak
    4,441 Points
    • Java
    • Java Data Structures
    • Exploring the Java Collection Framework
    • Upgrade Comparable to use Generics

    1 Answer

  • Liam Clarke
    Liam Clarke
    19,938 Points

    Generics?

    Posted July 5, 2017 7:18pm by Liam Clarke
    Liam Clarke
    19,938 Points
    • Java
    • Java Data Structures
    • Exploring the Java Collection Framework
    • Upgrade Comparable to use Generics

    0 Answers

  • James Bolanos
    James Bolanos
    8,885 Points

    java:6: error: cannot find symbol on generics exercise

    Posted May 30, 2017 9:02pm by James Bolanos
    James Bolanos
    8,885 Points
    • Java
    • Java Data Structures
    • Exploring the Java Collection Framework
    • Upgrade Comparable to use Generics

    1 Answer

  • N Elliott
    N Elliott
    2,628 Points

    What's wrong with this?

    Posted February 7, 2017 2:22am by N Elliott
    N Elliott
    2,628 Points
    • Java
    • Java Data Structures
    • Exploring the Java Collection Framework
    • Upgrade Comparable to use Generics

    1 Answer

  • Casey Huckel
    PLUS
    Casey Huckel
    Courses Plus Student 4,257 Points

    What's needed here?

    Posted January 11, 2016 10:22pm by Casey Huckel
    Casey Huckel
    Courses Plus Student 4,257 Points
    • Java
    • Java Data Structures
    • Exploring the Java Collection Framework
    • Upgrade Comparable to use Generics

    3 Answers

  • jinhwa yoo
    jinhwa yoo
    10,042 Points

    help me

    Posted December 10, 2015 6:30am by jinhwa yoo
    jinhwa yoo
    10,042 Points
    • Java
    • Java Data Structures
    • Exploring the Java Collection Framework
    • Upgrade Comparable to use Generics

    1 Answer

  • Mohammad Rahman
    Mohammad Rahman
    1,168 Points

    Changing to BlogPost type but not working

    Posted October 24, 2015 4:28am by Mohammad Rahman
    Mohammad Rahman
    1,168 Points
    • Java
    • Java Data Structures
    • Exploring the Java Collection Framework
    • Upgrade Comparable to use Generics

    1 Answer

  • Sean Flanagan
    Sean Flanagan
    33,235 Points

    Upgrade Comparable to Use Generics

    Posted July 24, 2015 8:28pm by Sean Flanagan
    Sean Flanagan
    33,235 Points
    • Java
    • Java Data Structures
    • Exploring the Java Collection Framework
    • Upgrade Comparable to use Generics

    1 Answer

  • Grigorij Schleifer
    Grigorij Schleifer
    10,365 Points

    Generics problem....

    Posted June 27, 2015 4:27pm by Grigorij Schleifer
    Grigorij Schleifer
    10,365 Points
    • Java
    • Java Data Structures
    • Exploring the Java Collection Framework
    • Upgrade Comparable to use Generics

    1 Answer

  • Grigorij Schleifer
    Grigorij Schleifer
    10,365 Points

    Help needed with generics ...

    Posted June 27, 2015 4:16pm by Grigorij Schleifer
    Grigorij Schleifer
    10,365 Points
    • Java
    • Java Data Structures
    • Exploring the Java Collection Framework
    • Upgrade Comparable to use Generics

    1 Answer

  • ISAIAH S
    ISAIAH S
    1,409 Points

    ERROR

    Posted May 20, 2015 3:47pm by ISAIAH S
    ISAIAH S
    1,409 Points
    • Java
    • Java Data Structures
    • Exploring the Java Collection Framework
    • Upgrade Comparable to use Generics

    2 Answers

  • dongji cui
    dongji cui
    2,464 Points

    why my code cannot work in this challenges

    Posted May 19, 2015 2:32am by dongji cui
    dongji cui
    2,464 Points
    • Java
    • Java Data Structures
    • Exploring the Java Collection Framework
    • Upgrade Comparable to use Generics

    2 Answers

  • Matthew Wadley
    Matthew Wadley
    1,282 Points

    Now that we know about Generics, let's upgrade our Comparable interface defined on the BlogPost class to use it. Rememb

    Posted May 4, 2015 8:20pm by Matthew Wadley
    Matthew Wadley
    1,282 Points
    • Java
    • Java Data Structures
    • Exploring the Java Collection Framework
    • Upgrade Comparable to use Generics

    10 Answers

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

    Treehouse

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

See Full Catalogue

Techdegree

  • Front End Web Development
  • Full Stack JavaScript
  • Python Development
  • Data Analysis
  • UX Design

Tracks

  • Learn to Code for Beginners
  • Beginning Python
  • Beginning SQL
  • Beginning Java
  • ...see more

Courses

  • JavaScript Basics
  • Intro to HTML & CSS
  • Python Basics
  • CSS Layout
  • ...see more

Explore

  • Plans
  • Perks
  • Free Treehouse Near Me
  • Treehouse for Libraries
  • Treehouse for Businesses
  • Twitter
  • YouTube
  • Facebook
  • LinkedIn
  • Instagram
Terms & Conditions | Privacy

© 2024 Treehouse Island, Inc.