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'String.equals()' can be replaced with 'String.isEmpty()'

Reports equals() being called to compare a String with an empty string. In this case, using .isEmpty() is better as it shows you exactly what you're checking.


void checkString(String s){ if ("".equals(s)) throw new IllegalArgumentException(); }
void checkString(String s){ if (s != null && s.isEmpty()) throw new IllegalArgumentException(); }

"".equals(str) returns false when str is null. For safety, this inspection's quick-fix inserts an explicit null-check when the equals() argument is nullable. Use the option to make the inspection ignore such cases.

Inspection options

Here you can find the description of settings available for the 'String.equals()' can be replaced with 'String.isEmpty()' inspection, and the reference of their default values.

Do not report when null-check could be necessary

Default: Selected

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Java, 241.14841

Last modified: 12 March 2024