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Alle Quests Java Syntax Java Core Java Multithreading Java Collections JSP und Servlets Module 3. Java Professional Module 4. SQL & Hibernate Module 5. Spring
Alle Level 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 29

    Java Multithreading
    Level 9, Lektion 0
    You've reached Level 29
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  • Naming conventions, code conventions

    Java Multithreading
    Level 9, Lektion 1
    "Hi, Amigo! Today I'm going to tell you about code styles and the importance of code style." "I'll start with what matters most. Java code should be easy to read. The general approach to the code is this: code is written once but read a hundred times." "Suppose you and 10 other programmers are writing an application. You work on the application for three years, with intermediate releases every three months ..."
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  • Practice with naming conventions (fix something to fit the standard)

    Java Multithreading
    Level 9, Lektion 2
    "Hi, Amigo!"
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  • Autoboxing (immutables)

    Java Multithreading
    Level 9, Lektion 3
    "Hi, Amigo!"
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  • Number (Integer, Long, Byte)

    Java Multithreading
    Level 9, Lektion 4
    "Since developers could come up with classes that describe numbers, they decided to be creative, like real developers." "First, they came up with an abstract Number class, from which Byte, Short, Integer, Long, Float, and Double are derived. It has methods that help convert numbers to other numeric types ..."
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  • Practice with autoboxing and numbers

    Java Multithreading
    Level 9, Lektion 5
    "Hi, Amigo!"
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  • Boolean

    Java Multithreading
    Level 9, Lektion 6
    "Hi, Amigo!" "Hi, Kim." "I'm going to tell you about the Boolean type. It's a wrapper for the boolean type, and it's as easy as pie. Here's some simplified code from the Boolean class ..."
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  • Practice with autoboxing Booleans

    Java Multithreading
    Level 9, Lektion 7
    "Hi, Amigo!"
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  • Character

    Java Multithreading
    Level 9, Lektion 8
    "Hi, Amigo! It's me again. I'd like to tell you about another fairly simple wrapper class. Today we'll be talking about Character, the wrapper for char." "This class is also quite simple ..."
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  • Practice with autoboxing Characters

    Java Multithreading
    Level 9, Lektion 9
    "Hi, Amigo!"
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  • Void et al.

    Java Multithreading
    Level 9, Lektion 10
    "Hi, Amigo! I've got another small and interesting topic for you. The Void type." "And why would you need such a type? I mean, I understand void: it's to bring functions and procedures into alignment. We don't have procedures, but we have functions that return void (nothing)." "Yep, but do you remember that Ellie recently told you about the Callable interface?" "Yes ..."
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  • Learning to google. (How to set up IDEA for specific coding conventions: Ctrl+Alt+L)

    Java Multithreading
    Level 9, Lektion 11
    "Hi, Amigo!" "Let's continue our lessons on how to google." "Here are some exercises ..:"
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