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Asked: 2026-05-24T17:29:21+00:00

I know about camel case rules, but I’m confused with this m rule. What

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I know about camel case rules, but I’m confused with this m rule. What does it stand for? I’m a PHP developer. “We” use first letters of variables as indication of type, like ‘b’ for boolean, ‘i’ for integer and so on.

Is ‘m’ a Java thing? Does it stand for mobile? mixed?

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  1. Editorial Team

    This notation comes from AOSP (Android Open Source Project) Code Style Guidelines for Contributors:

    Follow Field Naming Conventions

    • Non-public, non-static field names
      start with m.
    • Static field names start with s.
    • Other fields start with a lower case letter.
    • Public static final fields (constants) are ALL_CAPS_WITH_UNDERSCORES.

    Note that the linked style guide is for code to be contributed to the Android Open Source Project.

    It is not a style guide for the code of individual Android apps.

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