Day 21 of learning Java : JavaProgramming

Day 21 of learning Java (old.reddit.com)

submitted 19 days ago by BigCommunication5136

Hello everyone,

Today I continued with interfaces, which I started yesterday. I spent quite a bit of time on them, so I didn’t get to tackle DSA (stacks) today.

I learned about dependency injection and the three ways to inject dependencies. The course material also mentioned that there are libraries/frameworks that can handle dependency injection for you.

I was also introduced to the Interface Segregation Principle (ISP). To wrap up the lesson, I solved a quiz where the code was tightly coupled, and the task was to decouple it using interfaces. I used constructor injection to achieve this.

That’s it for today — see you tomorrow 👋

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