How do you comment out code? Using /*...*/? Using your IDE to put // before each line? There is a third method:
if (0 == 1) {
... code ...
}
Pros:
- Nests
- You need only change a single character to “flip” the comment: Replace the 0 with 1.
- You won’t get warnings because of suddenly unused imports or local variables.
- The Java compiler will remove this block of code in the optimization step, so no runtime penality.
Cons:
- Can only be used inside of methods.
If you need a fast way to repeatedly comment in/out a piece of code elsewhere, use this syntax:
//* Fast flip comment starts here
... code ...
/* and ends here */
Inside of a /*...*/ comment, the sequence “/*” has no special meaning. To comment out the block of code, remove the first “/” in “//*”:
/* Fast flip comment starts here
... code ...
/* and ends here */
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