Either refactor (#2237)

vavr/src/main/java/com/baeldung/vavr/either/EitherDemo.java

@@ -18,7 +18,7 @@ public class EitherDemo {
 	}
 
 	public static Map<String, Object> computeWithoutEitherUsingMap(int marks) {
-		Map<String, Object> results = new HashMap<String, Object>();
+		Map<String, Object> results = new HashMap<>();
 		if (marks < 85) {
 			results.put("FAILURE", "Marks not acceptable");
 		} else {
@@ -27,64 +27,11 @@ public class EitherDemo {
 		return results;
 	}
 
-	public static Either<String, Integer> computeWithEither(int marks) {
+	static Either<String, Integer> computeWithEither(int marks) {
 		if (marks < 85) {
 			return Either.left("Marks not acceptable");
 		} else {
 			return Either.right(marks);
 		}
 	}
-
-	public static String getError(Either<String, Integer> result) {
-		return result.getLeft();
-	}
-
-	public static int getMarks(Either<String, Integer> result) {
-		return result.get();
-	}
-
-	public static int getModifiedMarks(Either<String, Integer> result) {
-		result = result.right().map(i -> i * 2).toEither();
-		return result.get();
-	}
-
-	public void utilities() {
-
-		String error;
-		int marks;
-
-		Either<String, Integer> result = computeWithEither(100);
-
-		result.toArray();
-		result.toCharSeq();
-		result.toLinkedSet();
-		result.toList();
-		result.toOption();
-		result.toPriorityQueue();
-		result.iterator();
-		result.toVector();
-		result.toTree();
-		result.toStream();
-
-		result.toJavaArray();
-		result.toJavaList();
-		result.toJavaOptional();
-		result.toJavaParallelStream();
-		result.toJavaSet();
-		result.toJavaStream();
-		result.toJavaList();
-
-		Either.RightProjection<String, Integer> projection = computeWithEither(9).right();
-
-		result.contains(800);
-		result.isLeft();
-		result.isRight();
-
-		if (result.isLeft()) {
-			error = result.getLeft();
-		} else {
-			marks = result.get();
-		}
-	}
-
 }

vavr/src/test/java/com/baeldung/vavr/PatternMatchingUnitTest.java

@@ -100,13 +100,11 @@ public class PatternMatchingUnitTest {
         })));
     }
 
-
+    private void displayEven() {
-
-    public void displayEven() {
         System.out.println("Input is even");
     }
 
-    public void displayOdd() {
+    private void displayOdd() {
         System.out.println("Input is odd");
     }
 }

vavr/src/test/java/com/baeldung/vavr/either/EitherUnitTest.java

@@ -1,8 +1,7 @@
 package com.baeldung.vavr.either;
 
-import org.junit.Test;
-
 import io.vavr.control.Either;
+import org.junit.Test;
 
 import static org.junit.Assert.assertEquals;
 
@@ -11,21 +10,28 @@ public class EitherUnitTest {
 	@Test
 	public void givenMarks_whenPassNumber_thenExpectNumber() {
 		Either<String, Integer> result = EitherDemo.computeWithEither(100);
-		int marks = EitherDemo.getMarks(result);
+		int marks = result.right()
+		  .getOrElseThrow(x -> new IllegalStateException());
+
 		assertEquals(100, marks);
 	}
 
 	@Test
 	public void givenMarks_whenFailNumber_thenExpectErrorMesssage() {
 		Either<String, Integer> result = EitherDemo.computeWithEither(50);
-		String error = EitherDemo.getError(result);
+		String error = result.left()
+          .getOrNull();
+
 		assertEquals("Marks not acceptable", error);
 	}
 
 	@Test
 	public void givenPassMarks_whenModified_thenExpectNumber() {
 		Either<String, Integer> result = EitherDemo.computeWithEither(90);
-		int marks = EitherDemo.getModifiedMarks(result);
+		int marks = result.right()
+          .map(x -> x * 2)
+          .get();
+
 		assertEquals(180, marks);
 	}