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float to double (#5118)

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This commit is contained in:
myluckagain 2018-08-31 02:42:16 +05:00 committed by Predrag Maric
parent 278cb53c7f
commit 3824590375
2 changed files with 15 additions and 15 deletions
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10
core-java/src/main/java/com/baeldung/linesintersection/LinesIntersectionService.java
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@ -5,17 +5,17 @@ import java.util.Optional;
public class LinesIntersectionService { public class LinesIntersectionService {
public Optional<Point> calculateIntersectionPoint(float m1, float b1, float m2, float b2) { public Optional<Point> calculateIntersectionPoint(double m1, double b1, double m2, double b2) {
if (m1 == m2) { if (m1 == m2) {
return Optional.empty(); return Optional.empty();
} }
float x = (b2 - b1) / (m1 - m2);
float y = m1 * x + b1;
Point point = new Point(Math.round(x), Math.round(y)); double x = (b2 - b1) / (m1 - m2);
double y = m1 * x + b1;
Point point = new Point();
point.setLocation(x, y);
return Optional.of(point); return Optional.of(point);
} }
} }

20
core-java/src/test/java/com/baeldung/linesintersection/LinesIntersectionServiceUnitTest.java
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@ -14,24 +14,24 @@ public class LinesIntersectionServiceUnitTest {
@Test @Test
public void givenNotParallelLines_whenCalculatePoint_thenPresent() { public void givenNotParallelLines_whenCalculatePoint_thenPresent() {
float m1 = 0; double m1 = 0;
float b1 = 0; double b1 = 0;
float m2 = 1; double m2 = 1;
float b2 = -1; double b2 = -1;
Optional<Point> point = service.calculateIntersectionPoint(m1, b1, m2, b2); Optional<Point> point = service.calculateIntersectionPoint(m1, b1, m2, b2);
assertTrue(point.isPresent()); assertTrue(point.isPresent());
assertEquals(point.get().x, 1); assertEquals(point.get().getX(), 1, 0.001);
assertEquals(point.get().y, 0); assertEquals(point.get().getX(), 1, 0.001);
} }
@Test @Test
public void givenParallelLines_whenCalculatePoint_thenEmpty() { public void givenParallelLines_whenCalculatePoint_thenEmpty() {
float m1 = 1; double m1 = 1;
float b1 = 0; double b1 = 0;
float m2 = 1; double m2 = 1;
float b2 = -1; double b2 = -1;
Optional<Point> point = service.calculateIntersectionPoint(m1, b1, m2, b2); Optional<Point> point = service.calculateIntersectionPoint(m1, b1, m2, b2);