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errorprone.bugpattern.ArrayEquals.md Maven / Gradle / Ivy

Generally when comparing arrays for equality, the programmer intends to check
that the contents of the arrays are equal rather than that they are actually the
same object. But many commonly used equals methods compare arrays for reference
equality rather than content equality. These include the instance `.equals()`
method, Guava's `com.google.common.base.Objects#equal()`, JDK's
`java.util.Objects#equals()`, and Android's
`androidx.core.ObjectsCompat#equals()`.

If reference equality is needed, `==` should be used instead for clarity.
Otherwise, use `java.util.Arrays#equals()` to compare the contents of the
arrays.