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'String.indexOf()' expression can be replaced with 'contains()'

Reports comparisons with String.indexOf() calls that can be replaced with a call to the String.contains() method.


boolean b = "abcd".indexOf('e') >= 0;

After the quick-fix is applied:

boolean b = "abcd".contains('e');

This inspection only reports if the language level of the project or module is 5 or higher.

Inspection Details

Available in:

IntelliJ IDEA 2023.3, Qodana for JVM 2023.3


Java, 233.SNAPSHOT

Last modified: 13 July 2023