Inheritance and polymorphism in java with example programs jobs

I'm facing an issue with my Java project which needs to connect to Firebase for sending push notifications. Despite having configured the roles, permissions and scopes in Google Cloud Platform, I keep receiving an error related to the token: "Error parsing token refresh response. Expected value access_token not found." I've tried multiple methods for refreshing the token, as well as regenerating the credentials JSON file several times, but nothing seems to work. What I need: - Help in debugging this token error. - Screen sharing via Google Meet or a similar platform. Please note that I will not share my project code. I work on VScode, and any assistance would be greatly appreciated.

I'm looking for a skilled developer to map our pre-built React frontend to an existing .NET API. The project involves: - Displaying product details from the API on the frontend - Implementing basic authentication to access the API Ideal candidates should have: - Strong experience with React - Proficiency in .NET - Familiarity with basic authentication methods - Prior experience in API mapping to frontend Please provide examples of similar projects you've completed.

I'm in need of a service that can provide an image, a definition, and an example sentence for a significant number of words (more than 100). This is for the American Language Course, which is a book used to teach English to international military students. These words will be provided by me in sections. I have attached an PowerPoint example for section 7.1. Key Requirements: - Ability to source or create suitable images for each word. Any type of image is acceptable (stock images, custom illustrations, etc.) just as long as it appropriately represents the word. Preferably realistic. ChatGPT works. - Strong understanding of language to craft clear, concise definitions and example sentences. - Creativity and resourcefulness i...

...requires candidates with a strong technical background and a passion for teaching. The ideal candidate should have extensive experience in Azure data engineering and training delivery. What We Need From You as a Recruiter: Identify and vet qualified freelance or contract candidates who meet the following job requirements. Manage the recruitment process, from sourcing to presenting a shortlist of top candidates. Ensure candidates are skilled and motivated to handle the responsibilities outlined below. Candidate Responsibilities (For Your Recruitment): Design and deliver comprehensive training programs on Microsoft Azure data services, including Azure Data Factory, Azure Databricks, Azure SQL Database, and Azure Synapse Ana...

...project utilizing the @wdragon/react-native-voice open-source library (Modification Request) Required Technical Skills • Tech Stack: • React Native • TypeScript • Swift or Objective-C (for iOS development) • Java or Kotlin (for Android development) Requirements1. Consistent Cross-Platform Functionality (iOS & Android) All features must operate consistently on both iOS and Android. 1. Improvement of Speech-to-Text (STT) Processing Currently, audio played from the device speaker is being picked up again by the microphone and processed as STT input. We need to clearly distinguish between: The sound coming from the speaker The user’s voice captured by the microphone Only the user’s voice shoul...

I'm looking for a skilled email marketer with a strong grasp of AI and experience with VIP customer programs to help enhance customer engagement through tailored email campaigns. The content of these emails will vary, including personalized messages, informative articles, and product promotions. Key Responsibilities: - Develop and implement an email marketing strategy focused on engaging our VIP customers - Create a variety of email content, from personalized messages to product promotions - Utilize AI tools to optimize email delivery and engagement - Assess and recommend the best email marketing platform for our needs (currently open to options beyond Mailchimp, Constant Contact, or Sendinblue) Ideal Skills and Experie...

We are seeking a highly motivated and skilled freelance Digital Marketing Expert to manage and grow our infotainment website. This is a freelance project with the potential for repeat work based on performance. The maximum budget for this project is ₹10,000 INR per month. The primary goal is to increase website traffic, improve search engine rankings, and generate advertising revenue. The ideal candidate will be a self-starter with a proven track record in digital marketing, SEO, social media management, and online advertising. Responsibilities and Deliverables: • Content Publishing and SEO Optimization: o We will provide a maximum of 5 articles per day (approximately 120-150 articles per month) for publishing on the web...

I'm seeking a skilled writer with a strong understanding of military operations and training programs to assist in drafting a 1,500 - 2,000 word journal article. The article will argue for a significant change in the current utilization format of the Army's 150U Warrant Officers, advocating for the implementation of an Uncrewed Aircraft System (UAS) training program and utilization similar to that of the USAF. Must be in word format., and reference all sources used. No preferred sourcing format. Key Focus: The article should primarily emphasize how such a shift could enhance 'Strategic Flexibility through Modernization'. Source Inclusion: The piece will predominantly reference 'Military reports and...

Mountain climbing is a fun activity, but what if it becomes a scary story. Mount Lawu is a mountain located in the border area between Karanganyar (Jakarta) and East Java.

...AI models? We partner with organizations to train AI large language models, helping cutting-edge generative AI models write better code. Projects typically include discrete, highly variable problems that involve engaging with these models as they learn to code. There is no requirement for previous AI experience. About the opportunity: Outlier is looking for talented coders to help train generative artificial intelligence models This freelance opportunity is remote and hours are flexible, so you can work whenever is best for you You may contribute your expertise by… Crafting and answering questions related to computer science in order to help train AI models Evaluating and ranking code generated by AI models Examples of desirable exper...

...Asia, U.S., and Canada) Description: We are an official marketing and recruitment partner of multiple U.S. universities, specializing in helping international students pursue higher education opportunities in the United States. We are seeking skilled Lead Generation Specialists to help identify and generate quality leads of students interested in studying in the U.S. Key Responsibilities: Generate high-quality leads of students from South Asia, Southeast Asia, the U.S., and Canada who are interested in pursuing undergraduate, graduate, and professional programs in the U.S. Develop and implement lead generation strategies through digital marketing, social media outreach, email marketin...

I'm seeking a Learning and Development expert to enhance our ongoing employee training programs. The primary focus will be on: 1. Employees lack consistent technical skills across teams. 2. There is a gap in leadership skills among middle managers. 3. There is a low engagement rate with the current online learning platform. 4. There is a relatively slow adoption of AI solutions to improve self learning and development. The ideal candidate will have a strong background in designing and implementing comprehensive training programs, with a focus on these three skill sets. Experience in a similar role is a plus.

I need an experienced professional who can perform regression testing on my web applica...an experienced professional who can perform regression testing on my web application using Selenium with Java. Key Requirements: - Proficiency in Java and Selenium - Experience in performing regression tests - Capability to conduct tests on Chrome browser - Understanding of data creation through API - Data writing and extraction from excel/CSV - Page Object Model The focus of this project is to ensure that all features of the web application are working as intended after updates or changes, and to identify any potential issues before they impact users. The ideal freelancer will be detail-oriented, capable of developing comprehensive test cases...

...arranged in grids with 3 rows (colors: Red, Green, Blue, Yellow) and 5 numbers (1–100) per row. The data for the cards is to be read from a file named ''. The data for each player ends with 'FIN'. The input will need to be handled in lowercase (except for 'FIN') with flexible whitespace allowed between elements. Key Requirements: - Develop a command-line interface program in Pascal - Properly read and interpret data from '' - Handle input with flexible whitespace - Include 'FIN' as an end marker for each player's cards - Validate both format and values from '' Ideal Skills and Experience: - Expertise in Pascal programming - Experie...

I need a proficient Java Springboot developer for integrating REST APIs of flight reservation system, specifically for data retrieval from various third-party APIs. Ideal Skills and Experience: - Extensive experience with Java Springboot - Proficient in REST API integration - Familiar with retrieving data from third-party APIs - Experience in software development, particularly back-end development. - Competency in problem-solving and troubleshooting. Please include examples of similar projects you've completed in your proposal.

I'm seeking a skilled Java developer with expertise in Spring for enhancing a web application. The primary focus of this project is on developing new features. Ideal candidates should: - Have a strong background in Java and Spring framework - Possess experience in web application development - Be able to translate feature requirements into functional code Your role will primarily involve: - Understanding the current architecture of the web application - Collaborating with me to conceptualize new features - Implementing these features in a robust and efficient manner I look forward to your proposals.

I'm looking for a skilled Android developer who can help me build a social networking app. Key Responsibilities: - Full website development experience - Specific expertise in Android app development - Strong understanding of social networking features and functionalities Ideal Skills: - Proficiency in Java/Kotlin for Android development - Experience with graphic design for user-friendly interfaces - Knowledge of e-commerce features for potential future integration - Skills in UI/UX design to ensure an engaging user experience.

My android app is experiencing a critical issue where it crashes during a specific action. The app also needs some UI/UX enhancements, particularly in terms of functionality. Ideal Skills: - Android app development - Debugging/crash analysis - UI/UX design - Android SDK - Java/Kotlin Key Tasks: - Identify and fix the crash issue - Improve the UI/UX functionality of the app - Ensure the app is stable after the fixes

Team Needed: Java (Spring Boot) and React Vite Experts Project Overview: We are seeking a team with extensive experience in Java Spring Boot and React Vite to collaborate on enhancing and developing additional modules for our Management System. This is a complex and deep system, and we need professionals who can deliver high-quality results within a tight timeline. Key Requirements: Backend Expertise: In-depth knowledge and proven experience in Spring Boot. Frontend Expertise: Skilled in React Vite. Ability to deliver each module within a 1-2-week timeframe Proven track record of managing and delivering complex modular systems. Scope of Work: Develop and integrate additional modules...

I'm looking for a professional app developer who can create a mobile app (iOS and Android) for my restaurant similar to Joe & The Juice's app. The app should allow customers to order food from our full menu, and offer discounts and other benefits to our customers. Key Features: 1. Full menu display: The app should display our complete menu with descriptions and prices. 2. In-app ordering: Customers should be able to place orders directly in the app. 3. Restaurant integration: The app needs to integrate with an iPad in our restaurant, so that orders arrive there. 4. Payment support: The app should support card payments on the spot when the customer picks up their food. Additional Features: - Loyalty program: A sy...

...freelancer to create a robust and user-friendly B2C Gift Card and Gift Voucher App. The app will enable users to browse, purchase, and manage gift cards through seamless integration with third-party APIs. It will feature a modern UI/UX design, efficient backend architecture, and advanced security measures to deliver an exceptional customer experience. Scope of Work: 1. Key Features • User Registration & Login: OTP-based authentication. • Gift Card Browsing: Categorized and searchable gift card listings with real-time discounts/offers. • Purchase & Delivery: Add-to-cart, instant purchase, and delivery via email/SMS. • Payment Integration: Multiple payment methods (UPI, Credit/Debit Cards, Wallets, e...

I am looking for a professional to do software testing at Skills ...professional to do software testing at Skills Required 1. Ensure the project is buildable locally and in CI/CD. 2. Conduct a quality analysis using SonarCloud. 3. Address the issues found or provide justifications for not fixing them. 4. Prepare and publish a Docker image on DockerHub. 5. Ensure the Docker container is running (e.g., web app or Java application). 6. Analyze code coverage using Cobertura or Jacoco. 7. Perform mutation testing using PiTest. 8. Conduct performance tests using JMH. 9. Create automated tests for poorly tested code components. 10. Analyze security using OWASP FindSecBugs and OWASP DC.

...for my toy store, with the primary goal of increasing online sales. The site needs to be engaging, user-friendly and optimized for conversion. Key Features: - A seamless, user-friendly checkout process that encourages purchases and reduces cart abandonment. - Smart product recommendations that enhance the shopping experience and increase average order value. - Integrated discount and loyalty programs to incentivize repeat purchases and build customer loyalty. I already have a logo and brand colors, so your task will mainly involve implementing these into the website design. Ideal Skills: - Proven experience in Shopify development - E-commerce expertise, particularly in the toy industry, would be a plus - Strong u...

I'm looking for a fitness branded video that serves a promotional/marketing purpose. The content should revolve around our fitness programs and brand identity. Key Requirements: - The video should be high-energy and funny, with a slightly crude and blunt tone. - Ideal candidates would have experience in creating similar fitness videos. - A strong understanding of brand identity and the ability to convey this through video content. - Creative skills to blend humor and high-energy visuals in a way that captures viewer's attention. - Experience in working with fitness brands or content is a plus.

...primarily provide comprehensive information about various training programs we offer. Key Features: - Client testimonials and success stories: To build credibility and attract new clients, we'll need a dedicated section showcasing our successful clients and their journeys. - Introduction to trainers: A section introducing our trainers and outlining their qualifications is crucial. This will help potential clients understand the expertise behind our training programs. - Payment Processing: The site will need a reliable and secure payment processing system for clients to purchase training packages. - Interactive workout plans: One of the unique features of our site should be interactive workout plans. These plans should be user-friend...

I'm seeking an experienced grant writer to help my female-owned rural women's health care clinic secure government funding. The primary focus will be to cover our operational costs. Key tasks: - Research and identify relevant government grants - Craft compelling grant proposals - Suggest potential grant programs Ideal candidates should: - Have a proven track record in grant writing - Be familiar with government grant processes - Understand the needs and challenges of rural health care Please provide examples of successful grants you've written in the past.

...skilled professional in cybersecurity and mobile app development to create a highly secure communication system designed to protect all communications from surveillance or interception. Key Features of the Project: 1. Secure Device: Customization of a smartphone to operate only via Wi-Fi. Disabling unnecessary features such as GPS, camera, microphone, and cellular modem. Customizing the operating system (e.g., GrapheneOS or CalyxOS) to prevent unauthorized modifications. 2. Custom Communication App: A messaging app similar to WhatsApp featuring:  Encrypted text messages.  Multimedia file sharing.  Secure audio calls. Peer-to-peer communication only (no intermediate servers). Implementation of advanced end-to-end encryption. 3. Anonymous and Secure Networ...

...Trainer/Tutor to deliver high-quality training to our clients. The ideal candidate will have extensive experience in Azure data engineering and a passion for teaching. Responsibilities: Design and deliver comprehensive training programs on Microsoft Azure data services, including Azure Data Factory, Azure Databricks, Azure SQL Database, and Azure Synapse Analytics. Develop course materials, hands-on labs, and tutorials tailored to various skill levels. Stay updated with the latest developments in Azure data engineering to ensure training content is current. Assess learners' knowledge and provide constructive feedback to facilitate improvement. Offer individualized instruction and mentorship based on learners�...

...individual expertise in BDSM education, coaching, and professional dominatrix services. With 20 years of experience, your mission is to offer personalized, professional training that enables individuals to explore and understand BDSM, promoting self-acceptance and fulfillment through kink. Website Objectives: Provide a professional and approachable online presence. Highlight your skills and extensive experience. Sell audio recordings and register participants for workshops. Efficiently manage contact through clear forms. Build and maintain a mailing list. Design Preferences: Professional, sexy, clear, and approachably sophisticated. Colors: Black, red, and white. The design should reflect qualities like integr...

I'm looking for a dedicated lead generation expert to help increase enrollment into our higher education programs tailored for teachers. Key Requirements: - Generate quality leads primarily focused on prospective students - Utilize a mix of Social Media, Email Campaigns, and Search Engine Marketing for lead generation Ideal Skills and Experience: - Proven experience in lead generation for educational programs - Proficiency in utilizing Social Media platforms, conducting Email Campaigns, and implementing Search Engine Marketing strategies - Ability to generate quality leads that convert to enrollments

...history application in Java. This app should closely resemble the default Android call history interface. Key Features: - A search function to easily find specific calls - Call statistics to provide insight into calling habits - An icon for each call that represents the first letter of the contact's name -Upon clicking one entry, the entry should expand and show more options like add contact, sms, etc as seen with default android call history app project needs to be done in android studio using Java, using latest versions of the tools. need to handover the entire codebase from android studio. The ideal candidate will have: - Extensive experience in Android app development - A strong understanding of Android's design principl...

I'm seeking a Java Developer to enhance my app with spreadsheet capabilities. The specifics of the project are still being finalized, but I need someone with a strong background in Java and experience with spreadsheet integration. Key Responsibilities: - Implementing spreadsheet functionality within the app - Ensuring seamless integration with either Excel or Google Sheets - Potentially adding user authentication features Ideal Skills: - Proficient in Java with a solid understanding of its application in app development - Experience with spreadsheet software and integration - Knowledge of user authentication processes and implementation in apps Please note that the speci...

set up a Discretionary Trust specifically designed for a disabled individual. The main goal is to ensure that the disabled person can keep their entitlements and benefits where they have a small inheritance due. The trust needs to be bulletproof in case the entltlement agencies choose to challenge it. You will know all about trusts, have experience in setting up a trust and know benefit law (UK Law relating to everything applies) Thanks.

I'm looking for a skilled web scraper to extract data from Bet365 across all sports markets. Key Requirements: - Scraping all available data across every market on Bet365 - Delivering the data in a structured JSON file - Specifying the frequency of data updates Ideal Skills: - Proficient in web scraping tools and techniques - Experience with sports data - Ability to structure and deliver data in a JSON format. The scraper should provide real-time updates (milliseconds) Java is mandatory We need only the consultantion for connection to the websocket Project target is live. Any solution to the PM would be appreciated

I'm looking for a C++ programmer to discreetly help me create a unique gift for my father, a devoted chess enthusiast. The project is a custom chess puzzle generat...devoted chess enthusiast. The project is a custom chess puzzle generator that operates via a command line interface. Key Features: - The program should generate puzzles that involve filling in the minimum amount of bishops and queens to attack every square on the chessboard. Ideal Skills: - Proficient in C++ with a deep understanding of chess. - Experience in developing command line interface programs. - Ability to maintain confidentiality as this is a surprise gift. This is a passion project intended to surprise my father, who believes I will be doing the coding myself. Your r...

...Compatible version: 1.7.10, 1.12.2 Purpose of mod: Experiment about the possibility of gameplay with complete removal of entity within game. Overall features Key features of mod 1. Deleting all vanilla entities Once you put this mod file inside the mod folder, it overwrites all entity-related information in the minecraft-{version}.jar file with dummy data. It's not just erasing during runtime based game memory, but actually overwriting jar file after decompiling it. 2. Preventing mod entity Also, as soon as you put it inside the mod folder, all the other mod files in the folder will be overwritten with dummy data. The file's name will also be changed to ""(because most Mod files are in jar style). Since the mod folder its...

I'm looking for a talented designer to create a stylish and unique two-piece bikini. The specific style of the bikini is yet to be determined, so I'm open to your expert suggestions. Key Responsibilities: - Design a trendy two-piece bikini - Provide options for various styles - Ensure the design is practical yet fashionable Utilizing fabric designs provided by us - creating something similar $10 per design Ideal Skills: - Proficient in fashion design - Experience in swimwear design - Knowledge of current bikini trends - Has access to and knowledge of relevant design programs Please include your portfolio showcasing your best similar past projects.

...Terms: 3 Months with the potential to extend for more than a year Overview Weare looking for a highly skilled and motivated Data Engineer with 4-8 years of experience to join our dynamic team. This role is ideal for individuals with advanced technical expertise in Python programming and relational databases, a strong background in data modeling and transformation, and the ability to process structured and unstructured data. The ideal candidate will thrive in a fast-paced, agile environment, collaborating effectively to develop features and solve complex problems. Key Responsibilities ● Design, develop, and maintain scalable data pipelines and systems. ● Process and transfor...

I'm seeking an accomplished developer to compile XMind8 for the Arm64/aarch64 architecture. This project is crucial and needs precision and a deep understanding of cross-platform compilation. Key requirements: - Strong Java development background - Experience with Eclipse SWT - Detail-oriented - Expert in cross-platform compilation processes - Passionate about software development The compiled version of XMind8 needs to be compatible with: - Arm64/aarch64 architecture - Linux (specifically Ubuntu) If you're up for this unique challenge, I would be thrilled to hear from you.

I need to rewrite an app from Android to Flutter

I'm looking for a skilled software developer to create a desktop application tailored for productivity. This application will pr...skilled software developer to create a desktop application tailored for productivity. This application will primarily target Windows users. Key Requirements: - Expertise in Windows desktop application development. - Strong background in creating productivity tools. - Ability to design intuitive and user-friendly interfaces. - Experience with software testing and debugging. Ideal Skills: - Proficiency in languages like C#, Java, or Python. - Familiarity with UI/UX design principles. - Knowledge of productivity software trends. Your role will be crucial in delivering a high-quality product th...

...of NGO Automation Website + Software with EdTech Features Project Description We are looking for an experienced software development team or freelancer to build a comprehensive NGO Automation Website and Software for our organization. The solution should include the following features: Core Features Domain & Hosting: Includes domain registration (.in) and hosting services. SSL Certificate: Secure website with SSL encryption. Business Emails: Set up two business email addresses. Membership Management: ID cards with QR codes for members. Appointment letters with QR codes. Certificates for members with QR codes. Donation Management: Donation receipts with QR codes. Accept donations via payment gateways (Razorpay or PhoneP...

...expert-level interviewer in the Java development field to assess a candidate's technical skills. Key Focus Areas: - Advanced Java Programming Concepts: The interviewer should evaluate the candidate's understanding and application of multithreading, collections, and exception handling. - Framework Proficiency: Proficiency in Spring and Hibernate is critical. The interviewer should assess the candidate's experience and expertise in using these frameworks. - Database Integration & Optimization: The candidate's knowledge and skills in database integration and performance optimization are to be assessed. The ideal interviewer should have a deep understanding of Java best pract...

...deliver customized content, quizzes with real-time feedback, and personalized recommendations. Key Requirements: - Frontend Development: For mobile, I'm open to either Flutter or React Native. For web, I prefer React.js or Angular. - Backend Development: Proficiency in Node.js, Python, or Java is essential. The backend will need to support a CMS, user management, and a question bank. - AI/ML: The platform should utilize adaptive learning techniques and predictive analytics for personalized learning experiences. - Video Hosting: Experience with AWS S3 and Vimeo API integration is a plus. - Analytics: The platform should offer real-time tracking and reporting capabilities. Ideal candidates will have a deep understandin...

I'm in urgent need of a skilled graphic designer who can trace the font from an image and convert it into a vector image. The text I'm referring to is "Hackah Jak". in the attached image. Key requirements: - Identify and trace the font from the image accurately - Convert the traced font into a vector image The project has a strict deadline of 12 hours. I would highly appreciate if the freelancer could deliver the vector image in a commonly used format such as SVG, EPS or AI. Ideal skills and experience: - Proficient in using graphic design software (especially vector-based programs) - Prior experience in font tracing and vector creation - Able to meet tight deadlines without compromising on qualit...

...an experienced Financial Modeling Consultant with in-depth knowledge of affordable housing development, specifically in the state of Florida. The ideal candidate will have expertise in affordable housing underwriting models, including the integration of grants, subsidies, and funding programs, and will guide us in improving our financial models and making strategic financial decisions. Responsibilities: Review and refine our existing underwriting model for affordable housing projects. Develop a new financial model, if necessary, tailored to our project needs. Analyze grant programs, subsidies, and other funding mechanisms relevant to affordable housing in Florida. Provide insights into complianc...

...an experienced Financial Modeling Consultant with in-depth knowledge of affordable housing development, specifically in the state of Florida. The ideal candidate will have expertise in affordable housing underwriting models, including the integration of grants, subsidies, and funding programs, and will guide us in improving our financial models and making strategic financial decisions. Responsibilities: Review and refine our existing underwriting model for affordable housing projects. Develop a new financial model, if necessary, tailored to our project needs. Analyze grant programs, subsidies, and other funding mechanisms relevant to affordable housing in Florida. Provide insights into complianc...

I have a WAR file project that I need deployed on a Tomcat server running on an Ubuntu server. The WAR file deployment ...file project that I need deployed on a Tomcat server running on an Ubuntu server. The WAR file deployment involves a shell script, Docker Compose, a JAR, and other configuration files. The final deployment needs to be hosted on a specific domain that I own. - I prefer to use the Shell script for deployment. - I have a Shell script ready for deployment. - I may need some modifications to the Shell script. I am looking for an expert who can assess my Shell script and make any necessary modifications to ensure a smooth deployment. The backend of project is in java and front end is in react/node js. Project ran successfully on lo...

I've encountered a troubling issue with my Windows 11 machine. An error message pops up immediately after booting: "The type initializer for App1.a threw an exception." This occurred right after I installed a new general application. I'm seeking a skilled IT professional with experience troubleshooting Windows 11 boot errors linked to newly installed software. Please reach out if you can assist. See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box. ************** Exception Text ************** : The type initializer for 'App1.a' threw an exception. ---> : Could not load file or assembly ', Version=, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed'

...message below See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box. ************** Exception Text ************** : The type initializer for 'App1.a' threw an exception. ---> : Could not load file or assembly ', Version=, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies. An attempt was made to load a program with an incorrect format. ---> : Could not load file or assembly '489472 bytes loaded from Qndmgaeq, Version=1.15.4.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An attempt was made to load a program with an incorrect format. ---> : Operation