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Java: Code formatting

Code formatting

  • 80 characters
  • cmd + shift + F to auto-format existing code

From Java 7 for Absolute Beginners:

To make your programming simpler and easier (and not drive other programmers crazy), keep your lines (both statements and declarations) as short as possible. For historical reasons, 80 characters is often used as a suggested limit for the length of a line. If you get to 80 characters, find a way to divide the line into two lines. (The 80-character value comes from punch cards having 80 characters.) You can certainly have longer lines (and there are times when it’s acceptable), but hold down on really long lines, for sanity’s sake.

(Java 7 for Absolute Beginners: chapter 2)

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This means that the width of your code blocks should support 80 characters. I believe this is about 600px, but I’m not sure.

About Tom Johnson

Tom Johnson

I'm an API technical writer based in the Seattle area. On this blog, I write about topics related to technical writing and communication — such as software documentation, API documentation, AI, information architecture, content strategy, writing processes, agent skills, tech comm careers, and more. Check out my AI courses for more on the latest in AI and tech comm. If you're looking for info about documenting APIs, see my API documentation course.

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