Lessons

You've reached Level 23

"Hi, Amigo!" "Hi, Bilaabo!" "Today I'm going to tell you about several keywords in Java. But I'll start with the most interesting: the keyword final." "You can use the keyword final when declaring a variable, method, or class." "And why do we need final?" "It's pretty simple. If we mark a variable as final, then it becomes unchangeable ..."

"Bilaabo has brought Amigo some tasks ..."

"Hi, Amigo!" "Hi, Ellie!" "Today we have a very interesting topic. Today I'm going to tell you about nested classes." "If a class is declared inside another class, then it is a nested class. Non-static nested classes are called inner classes." "Objects of an inner class are nested inside objects of the outer class and can therefore access the outer class's variables ..."

"Hi, Amigo! Ready to get started?" "Yeah, give me your inner class tasks already, Diego ..."

"So, topic number two is static nested classes. Remember that non-static nested classes are called inner classes." "Let's wrap our heads around what the word static means in the context of a nested class declaration. What do you think?" "If a variable is declared as static, then only one copy of the variable exists. So, if a nested class is static, then does that mean you can only create one object of that class?"

"Hi, Amigo!" "Yeah, tasks, I know, I know. By the way, Diego, you make great tasks." "Thanks for finally noticing. Here are some more ..."

"Hi, Amigo!" "But we've already said hello, Ellie!" "Hey, don't argue with your aunt. In the 31st century, if you haven't seen someone for more than half an hour, it's customary to say hello again. So don't give me your attitude!" "Anyway, it's time for another interesting topic: robot reproduction! ..."

"Who wants tasks on anonymous classes?" "Who could it be but me? Give them to me already. I want to do a little programming ..."

"Hi, Amigo!" "Let's continue our lessons on how to google." "Here are some exercises ..."

"Hi, Amigo!" "Here's additional material on the topic ..."

"Hi, buddy!" "Ellie came up today and asked: 'Darling, how do I look?" "But I wasn't paying attention, so I said," "«A little boring, but it's no a big deal!»" "You're kidding! ..."