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'if' statement with negated condition

Reports if statements that contain else branches and whose conditions are negated.

Flipping the order of the if and else branches usually increases the clarity of such statements.

There is a fix that inverts the current if statement.

Example:

void m(Object o1, Object o2) { if (o1 != o2) { System.out.println(1); } else { System.out.println(2); } }

After applying the quick-fix:

void m(Object o1, Object o2) { if (o1 == o2) { System.out.println(2); } else { System.out.println(1); } }

Use the Ignore '!= null' comparisons option to ignore comparisons of the != null form.

Use the Ignore '!= 0' comparisons option to ignore comparisons of the != 0 form.

Inspection options

Here you can find the description of settings available for the 'if' statement with negated condition inspection, and the reference of their default values.

Ignore '!= null' comparisons

Default: Selected

Ignore '!= 0' comparisons

Not selected

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Java, 241.16690

Last modified: 29 April 2024