Applied to a field/variable it means: it‘s a constant (the value can’t be modified.)
To be more correct: the variable assignment cannot be modified. Only in case of primitives and immutable objects the value cannot be modified.
final String[] foo = String[] { "bar" }; foo[0] = "quux"; // this is legal.
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To be more correct: the variable assignment cannot be modified. Only in case of primitives and immutable objects the value cannot be modified.