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All quests Java Syntax Java Core Java Multithreading Java Collections JSP & Servlets Module 3. Java Professional Module 4. SQL & Hibernate Module 5. Spring
All levels Level 0 Level 1 Level 2 Level 3 Level 4 Level 5 Level 6 Level 7 Level 8 Level 9 Level 10 Level 11 Level 12 Level 13 Level 14 Level 15 Level 16 Level 17 Level 18 Level 19 Level 20 Level 21 Level 22 Level 23 Level 24 Level 25 Level 26 Level 27 Level 28
  • You've reached Level 31

    Java Collections
    Level 1, Lesson 0
    You've reached Level 31
    Available
  • File, Files, Path

    Java Collections
    Level 1, Lesson 1
    "Hi, Amigo. Long time, no see." "Hi, Bilaabo. What are you going to talk about?" "Today I'm going to tell you about working with files. Java has a special class (File) that you can use to manage files on a hard drive. For managing file contents, there are other classes: FileInputStream, FileOutputStream, etc ..."
    Available
  • Practice using File

    Java Collections
    Level 1, Lesson 2
    "Hi, Amigo! I came up with a couple of interesting tasks for you." "They can only be completed in IntelliJ IDEA. Take a look at these interesting conditions…"
    Available
  • Files, Path

    Java Collections
    Level 1, Lesson 3
    "Oh, Rishi! Hi!" "Hi, Amigo! How's life?" "Great. Bilaabo has just been telling me a bunch of interesting things about File, and how to work with it." "As it happens, I think I have something to add on this topic." "Really? Then I'm all ears." "Okay, listen up. Java is constantly evolving. Its developers are constantly looking for new ways to do different things more efficiently. In Java 7, they added an alternative to the File class ..."
    Available
  • Practice with Files and Path

    Java Collections
    Level 1, Lesson 4
    "Hi, Amigo!" I came up with a couple of interesting tasks for you." "They can only be completed in IntelliJ IDEA. Take a look at these interesting conditions…"
    Available
  • FileInputStream, FileOutputStream, ZipOutputStream, ZipInputStream

    Java Collections
    Level 1, Lesson 5
    "Hi, Amigo!" "Hi, Ellie!" "Today we're going to study I/O streams." "Yes, I already know everything about them. We use the FileInputStream and FileOutputStream classes here." "Yep, and which of these classes' methods do you know?" "Sure. Here are the methods of FileInputStream ..."
    Available
  • Tasks | Level 7 | Lesson 6

    Java Collections
    Level 1, Lesson 6
    "Hi, Amigo!" I came up with a couple of interesting tasks for you." "They can only be completed in IntelliJ IDEA. Take a look at these interesting conditions…"
    Available
  • Reader, Writer

    Java Collections
    Level 1, Lesson 7
    "Hi, Amigo, once again." "Hello to you, Rishi. What will today's lesson be about?" "Today I'm going to tell you about Reader and Writer." "But, Rishi, I'm already know almost everything about them!" "Repetition is the mother of learning." "Hmm. Well, okay." "Reader and Writer are analogs to InputStream and OutputStream, but they work with characters, not bytes. Sometimes they are also called character streams, as opposed to InputStream ..."
    Available
  • Tasks | Level 1 | Lesson 8

    Java Collections
    Level 1, Lesson 8
    "Hi, Amigo!" I came up with a couple of interesting tasks for you." "They can only be completed in IntelliJ IDEA. Take a look at these interesting conditions…"
    Available
  • Properties

    Java Collections
    Level 1, Lesson 9
    "Today we are exploring another new and interesting topic: properties." "In Java, it's customary to make programs flexible and easily customizable, i.e. easily configurable." "For example, once per hour your program copies files from a certain directory, zips them, and sends them to you in email. To do this, the program needs to know the directory where the files will be taken from, and the email address where they should be sent ..."
    Available
  • Tasks | Level 1 | Lesson 10

    Java Collections
    Level 1, Lesson 10
    "Hi, Amigo! Here, take this interesting task. You can only complete this task in IntelliJ IDEA ..."
    Available
  • Learning to google | Level 1 | Lesson 11

    Java Collections
    Level 1, Lesson 11
    "Hi, Amigo!" "Let's continue our lessons on how to google." "Here are some exercises ..."
    Available
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