In order to check whether or not an index is in range [0, n) we can rely on a “if” statement, as below:
if (index = n) { ... }But, Java 9 comes with the method bjects.checkIndex() that checks if the given index is in range [0, n).
This method returns the given index or throws an IndexOutOfBoundsException:
import java.util.Objects;...int indexChecked = Objects.checkIndex(index, n);
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