diff --git a/core-java-modules/core-java-lang-math-5/src/main/java/com/baeldung/storingXYcoordinates/Point.java b/core-java-modules/core-java-lang-math-5/src/main/java/com/baeldung/storingXYcoordinates/Point.java new file mode 100644 index 000000000000..58824caecc5c --- /dev/null +++ b/core-java-modules/core-java-lang-math-5/src/main/java/com/baeldung/storingXYcoordinates/Point.java @@ -0,0 +1,43 @@ +package com.baeldung.storingXYcoordinates; + +import java.util.Objects; + +public class Point { + private final double x; + private final double y; + + public Point(double x, double y) { + this.x = x; + this.y = y; + } + + public double getX() { + return x; + } + + public double getY() { + return y; + } + + @Override + public String toString() { + return "Point{" + + "x=" + x + + ", y=" + y + + '}'; + } + + @Override + public boolean equals(Object o) { + if (this == o) return true; + if (o == null || getClass() != o.getClass()) return false; + Point point = (Point) o; + return Double.compare(point.x, x) == 0 && + Double.compare(point.y, y) == 0; + } + + @Override + public int hashCode() { + return Objects.hash(x, y); + } +} diff --git a/core-java-modules/core-java-lang-math-5/src/main/java/com/baeldung/storingXYcoordinates/PointRecord.java b/core-java-modules/core-java-lang-math-5/src/main/java/com/baeldung/storingXYcoordinates/PointRecord.java new file mode 100644 index 000000000000..943d8e5f06b8 --- /dev/null +++ b/core-java-modules/core-java-lang-math-5/src/main/java/com/baeldung/storingXYcoordinates/PointRecord.java @@ -0,0 +1,5 @@ +package com.baeldung.storingXYcoordinates; + +public record PointRecord(double x, double y) { +} + diff --git a/core-java-modules/core-java-lang-math-5/src/test/java/com/baeldung/storingXYcoordinates/XYCoordinatesUnitTest.java b/core-java-modules/core-java-lang-math-5/src/test/java/com/baeldung/storingXYcoordinates/XYCoordinatesUnitTest.java new file mode 100644 index 000000000000..de6175b386ce --- /dev/null +++ b/core-java-modules/core-java-lang-math-5/src/test/java/com/baeldung/storingXYcoordinates/XYCoordinatesUnitTest.java @@ -0,0 +1,84 @@ +package com.baeldung.storingXYcoordinates; + +import org.junit.jupiter.api.Test; +import static org.junit.jupiter.api.Assertions.assertEquals; +import java.awt.geom.Point2D; + +class XYCoordinatesUnitTest { + + @Test + void givenAPoint_whenUsingGetter_thenPointReturnsCoordinatesCorrectly() { + // Given a point with coordinates (10.0, 20.5) + Point point = new Point(10.0, 20.5); + + // Then its getters should return the correct values + assertEquals(10.0, point.getX(), "X coordinate should be 10.0"); + assertEquals(20.5, point.getY(), "Y coordinate should be 20.5"); + } + + @Test + void givenTwoPointsWithSameCoordinates_whenComparedForEquality_thenShouldBeEqual() { + Point point1 = new Point(5.1, -3.5); + Point point2 = new Point(5.1, -3.5); + + assertEquals(point1, point2, "Points with same coordinates should be equal"); + } + + @Test + void givenAPointRecord_whenUsingAccessorMethods_thenRecordReturnsCoordinatesCorrectly() { + // Given a record with coordinates (30.5, 40.0) + PointRecord point = new PointRecord(30.5, 40.0); + + // Then its accessor methods should return the correct values + assertEquals(30.5, point.x(), "X coordinate should be 30.5"); + assertEquals(40.0, point.y(), "Y coordinate should be 40.0"); + } + + @Test + void givenTwoRecordsWithSameCoordinates_whenComparedForEquality_thenShouldBeEqual() { + PointRecord point1 = new PointRecord(7.0, 8.5); + PointRecord point2 = new PointRecord(7.0, 8.5); + + assertEquals(point1, point2, "Records with same coordinates should be equal"); + } + + @Test + void givenAnAWTPoint_whenAccessingItsFieldsAndGetters_thenReturnsCoordinatesCorrectly() { + // Given an AWT Point + Point2D.Double point = new Point2D.Double(10.5, 20.5); + + // Then its public fields should hold the correct values + assertEquals(10.5, point.x); + assertEquals(20.5, point.y); + + // And its getters should also work + assertEquals(10.5, point.getX()); + assertEquals(20.5, point.getY()); + } + + @Test + void givenAnAWTPointForIntegerCoordinates_whenAccessingItsFieldsAndGetters_thenReturnsCoordinatesCorrectly() { + // Given an AWT Point + java.awt.Point point = new java.awt.Point(50, 60); + + // Then its public fields should hold the correct values + assertEquals(50, point.x); + assertEquals(60, point.y); + + // And its getters should also work + assertEquals(50, point.getX()); + assertEquals(60, point.getY()); + } + + @Test + void givenArrayOfCoordinates_whenAccessingArrayIndices_thenReturnsCoordinatesAtCorrectIndices() { + // Given an array representing coordinates (15.0, 25.0) + double[] coordinates = new double[2]; + coordinates[0] = 15.0; // X + coordinates[1] = 25.0; // Y + + // Then index 0 should be X and index 1 should be Y + assertEquals(15.0, coordinates[0], "Index 0 should be the X coordinate"); + assertEquals(25.0, coordinates[1], "Index 1 should be the Y coordinate"); + } +}