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全部目标 Java 语法 Java 核心 Java 多线程 Java 集合 JSP 和 Servlet Module 3. Java Professional Module 4. SQL & Hibernate Module 5. Spring
全部级别 级别 0 级别 1 级别 2 级别 3 级别 4 级别 5 级别 6 级别 7 级别 8 级别 9 级别 10 级别 11 级别 12 级别 13 级别 14 级别 15 级别 16 级别 17 级别 18 级别 19 级别 20 级别 21 级别 22 级别 23 级别 24 级别 25 级别 26 级别 27 级别 28
  • You've reached Level 35

    Java 集合
    第 5 级, 课程 0
    You've reached Level 35
    可用
  • Version control systems

    Java 集合
    第 5 级, 课程 1
    "Hi, Amigo!" "Hi!" "Today I will tell you about version control systems." "As you probably already know, programs are often very large and take a very long time to write. Sometimes dozens of people can spend years writing a program." "Projects with millions of lines of code are a reality." "Whoa ..."
    可用
  • Commits and branches

    Java 集合
    第 5 级, 课程 2
    "Today I'm going to tell you about the two most popular version control programs: SVN and Git." "SVN works approximately the way I described in the last lesson. Git is a little more complicated, and I plan to discuss it in more detail." "Can you give me links to the documentation for SVN and Git?" "Of course, just a second." http://svnbook.red-bean.com/en/1.7/svn-book.html ...."
    可用
  • Generics

    Java 集合
    第 5 级, 课程 3
    "Hi, Amigo!" "Hi, Ellie!""Today, Rishi and I are going to tell you all about generics." "Wait, I think I already know almost everything." "Almost everything, but not everything." "Really? OK, I'm ready to listen." "Then let's begin ..."
    可用
  • Tasks | Level 5 | Lesson 4

    Java 集合
    第 5 级, 课程 4
    可用
  • Generics: super, extends, list

    Java 集合
    第 5 级, 课程 5
    "Now for a new, interesting topic: wildcards." "Essentially, this is something like a «*» pattern that matches anything." "But let's start from the beginning." "Imagine that you have a Warrior class and a method that determines which of two warriors is stronger. Here's how this might look ..."
    可用
  • Tasks | Level 5 | Lesson 6

    Java 集合
    第 5 级, 课程 6
    可用
  • Generics: Class

    Java 集合
    第 5 级, 课程 7
    "Hi! I'm going to continue Ellie's lesson on generics. Ready to listen?" "Yes." "Then let's begin." "The first thing you need to know is that a class's methods can also have their own type parameters." "I know." "No, I specifically mean their own type parameters ..."
    可用
  • Tasks | Level 5 | Lesson 8

    Java 集合
    第 5 级, 课程 8
    可用
  • Generics: ? wildcard

    Java 集合
    第 5 级, 课程 9
    "Well, finally — another small lesson on generics." "Now I'm going to tell you how to get around type erasure." "Ah. That's something I want to know." "As you probably already know, Java has a Class type, which is used to store a reference to an object's class. "Here are some examples ..."
    可用
  • Tasks | Level 5 | Lesson 10

    Java 集合
    第 5 级, 课程 10
    可用
  • Learning to google | Level 5 | Lesson

    Java 集合
    第 5 级, 课程 11
    "Hi, Amigo!" "Let's continue our lessons on how to google." "Here are some exercises ..."
    可用
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CodeGym CodeGym 是一个从零开始学习 Java 语言编程的在线课程。本课程是初学者掌握 Java 语言的绝佳方式。它包含 1200 多个可即时验证的任务,以及基本范围内的 Java 基础理论。为了帮助你在教育上取得成功,我们实现了一组激励功能:小测验、编码项目以及有关高效学习和 Java 语言开发人员职业方面的内容。
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