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What is the efficient way to assign booleans in java?

We can assign a value in boolean

three ways

    boolean isDone;
    isDone = true;
    isDone = Boolean.valueOf(true);
    isDone = Boolean.TRUE;

so which appointment is more efficient?

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2 answers


Only the first is not related to boxing or unboxing. Thus, at first glance, the former will be the most effective. However, most compilers (or just-in-time compilers, if any) are likely to optimize the other two assignments just as effectively.



The story would be different, of course, if isDone

declared as Boolean

instead Boolean

. In this case, the third assignment would be my preference.

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Chances are the jit compiler and optimizer will optimize all of them anyway, but the "best" is theoretically the first: isDone = true;

since it doesn't include boxing and unboxing .



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