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Positive or negative (#12706)

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* Check if a number is positive or negative in Java

* reformat single line if/else statements

* Check if a number is positive or negative in Java

* [positiveOrNegative] using compareTo() instead of == to compare float numbers

* [positiveOrNegative] re-org imports
This commit is contained in:
Kai Yuan 2022-09-10 17:06:11 +02:00 committed by GitHub
parent ecfe4a05a2
commit 1b334f6a2d
2 changed files with 8 additions and 6 deletions
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6
core-java-modules/core-java-numbers-5/src/main/java/com/baeldung/positivenegative/PositiveOrNegative.java
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@ -26,11 +26,11 @@ public class PositiveOrNegative {
} }
public static Result bySignum(Float floatNumber) { public static Result bySignum(Float floatNumber) {
float result = Math.signum(floatNumber); Float result = Math.signum(floatNumber);
if (result == 1.0f) { if (result.compareTo(1.0f) == 0) {
return Result.POSITIVE; return Result.POSITIVE;
} else if (result == -1.0f) { } else if (result.compareTo(-1.0f) == 0) {
return Result.NEGATIVE; return Result.NEGATIVE;
} }
return Result.ZERO; return Result.ZERO;

8
core-java-modules/core-java-numbers-5/src/test/java/com/baeldung/positivenegative/PositiveOrNegativeUnitTest.java
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@ -1,10 +1,12 @@
package com.baeldung.positivenegative; package com.baeldung.positivenegative;
import org.junit.jupiter.api.Test; import static com.baeldung.positivenegative.PositiveOrNegative.Result.NEGATIVE;
import static com.baeldung.positivenegative.PositiveOrNegative.Result.POSITIVE;
import static com.baeldung.positivenegative.PositiveOrNegative.Result.*; import static com.baeldung.positivenegative.PositiveOrNegative.Result.ZERO;
import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
class PositiveOrNegativeUnitTest { class PositiveOrNegativeUnitTest {
@Test @Test
void givenIntegers_whenChkPositiveOrNegativeByOperator_thenReturnExpectedResult() { void givenIntegers_whenChkPositiveOrNegativeByOperator_thenReturnExpectedResult() {