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Discussion on: Effective Java Tuesday! Avoid Creating Unnecessary Objects!

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ujaehrig profile image
ujaehrig

The Boolean example is IMO not the best example for a factory method. As Boolean provides the two boolean values as immutable constants which are easier to use.

Also the parseBoolean (not parseValue) method returns a native boolean, which needs to be boxed. This is usually done via the Boolean#valueOf method, which will also return the constants.

You can see this quite nicely in the jshell:

Boolean.parseBoolean("true") == Boolean.TRUE