'String.equals()' called with 'CharSequence' argument

Reports calls to String.equals() with a CharSequence as the argument.

String.equals() can only return true for String arguments. To compare the contents of a String with a non-String CharSequence argument, use the contentEquals() method.

Example:

  boolean equals(String s, CharSequence ch) {
    return s.equals(ch);
  }

After quick-fix is applied:

  boolean equals(String s, CharSequence ch) {
    return s.contentEquals(ch);
  }

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

StringEqualsCharSequence

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Java | Probable bugs

New in 2017.3

Inspection ID: StringEqualsCharSequence

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection StringEqualsCharSequence

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

IntelliJ IDEA 2025.3

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.3, Qodana for JVM 2025.3,

Last modified: 03 December 2025