If (for some reason) your class does expose a public field, all hope ofĮver changing its representation is basically lost. Preserve some flexibility around that class’s internal representation. Provide some type of getter or accessor method. On a personal note, I agree with him that when it comes to publicĬlasses, which are accessible outside of their package, you should There are a bunch of problems which you can encounter when you expose You can’t change the representation without changing the API, youĬan’t enforce invariants, and you can’t take auxiliary action when aįield is accessed. Some of the hard-line, object-oriented programmers is because it doesn’t One of the reasons that this is looked upon badly by They’ll make a public value, and they’ll justĪccess it that way. Some folks are tempted to create data objects that, instead of havingĪccessors and mutators (getters and setters, respectively), just make Or package-private classes, but about public classes only. Public classes…” Keep that in mind: Joshua is not talking about private Today, I’m talking about Item 14, which states: “In public classes, useĪccessor methods, not public fields.” I think the key phrase here is “In #Android studio generate getters and setters android#Here is to relate them to Android development, and to talk about each of That you should implement in order to be a good Java developer. It gives a bunch of patterns and practices #Android studio generate getters and setters full#Some of these episodes are based aroundĮffective Java, a book that’s packed full of great information forĮvery single Java developer. This is a glimpse of what’s to come in Item #15, which is coming soon…ĭonn Felker: Today, I’m going to talk about Item 14 in Effectiveįor those of you who are just joining us, we do a small “mini-Fragment”Įpisode every once in a while. Donn digs into the details in this week’s episode. You’ll learn why it’s important to use accessors in your public classes and some caveats to this rule.įor example, you may decide that the class is a private inner class or package private. In this mini-Fragment episode, Donn talks about Item #14 of the Effective Java series – In public classes, use accessor methods, not public fields.
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