• BIT: Check to see if ((...) & 0) == 0 (BIT_AND_ZZ)

“This method compares an expression of the form (e & 0) to 0, which will always compare equal. This may indicate a logic error or typo.” – 2013-10-28

When ever a value is bitwise conjoined with zero (x & 0 ) the result is ALWAYS zero. That means there is no need to compare the result afterwards if it really is zero.

<code Java>

	int x = 131;
	if((x & 0) == 0){
		System.out.println("This will always happen");
	}

</Code>

<code Java>

	int x = 131;
	if((x | 0) == 0){
		System.out.println("This might happen");
	}

</Code>

There is no meaningful fix that we can offer. The programmer has to understand herself the logic error or typo and correct it manually.

FB = FindBugs, JT = JTransformer, Delta = JTransformer - FindBug