Java - Transformation from 2 arrays to a map - Imperative vs. Functional

FunctionalVsIemerativeTransformationTest.java

import static org.junit.jupiter.api.Assertions.*;

class FunctionalVsIemerativeTransformationTest {

    @Test
    void functionalVersusImperative() {
        // Imperative
        var parameterNames = new String[]{"aaa", "bbb"};
        var args = new Object[]{"arg1", "arg2"};
        Map<String, Object> params1 = new HashMap<>();
        for (int i = 0; i < parameterNames.length; i++) {
            params1.put(parameterNames[i], args[i]);
        }

        // Functional
        Map<String, Object> params2 = IntStream.range(0, parameterNames.length)
            .mapToObj(x -> new Pair<>(parameterNames[x], args[x]))
            .collect(Collectors.toMap(Pair::getKey, Pair::getValue));
        assertEquals(params1, params2);
    }
}