Java : Programming in java : https://onlinecourses.nptel.ac.in/noc19_cs84/preview
Python : Using Python to Access Web Data : https://www.coursera.org/learn/python-network-data?specialization=python
Python :Using Databases with Python : https://www.coursera.org/learn/python-databases?specialization=python
Web Designing : Web Design for Everybody: Basics of Web Development & Coding Specialization : https://www.coursera.org/specializations/web-design?specialization=python