isogram: fix build issues

The test file was trying to import the example code which it shouldn't
do. Also removed unneeded package declarations and renamed the test
file to be consistent.

exercises/isogram/src/example/java/IsogramChecker.java

-package example;
-
 import java.util.HashSet;
 import java.util.Set;
+
 import static java.util.Arrays.stream;
 import static java.util.stream.Collectors.joining;
 
 public class IsogramChecker {
-	
-	public IsogramChecker(){
-	}
-	
-	public boolean isIsogram(String word){
-		
-		Set<Character> charSet = new HashSet<>();
-		
-		String[] words = word.split(" ");
-		String newWord = concat(words);
-		
-		words = newWord.split("-");
-		newWord = concat(words).toLowerCase();
-		
-		for(int i = 0; i < newWord.length(); i++){
-			charSet.add(newWord.charAt(i));
-		}
-		
-		return charSet.size() == newWord.length();
-	}
-	
-	private String concat(String[] words){
-		return stream(words).collect(joining());
-	}
-	
+
+    public boolean isIsogram(String word) {
+
+        Set<Character> charSet = new HashSet<>();
+
+        String[] words = word.split(" ");
+        String newWord = concat(words);
+
+        words = newWord.split("-");
+        newWord = concat(words).toLowerCase();
+
+        for (int i = 0; i < newWord.length(); i++) {
+            charSet.add(newWord.charAt(i));
+        }
+
+        return charSet.size() == newWord.length();
+    }
+
+    private String concat(String[] words) {
+        return stream(words).collect(joining());
+    }
+
 }

exercises/isogram/src/test/java/IsogramCheckerTest.java

+import org.junit.Ignore;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+public class IsogramCheckerTest {
+
+    @Test
+    public void testIsogram() {
+        IsogramChecker iso = new IsogramChecker();
+        assertTrue(iso.isIsogram("duplicates"));
+    }
+
+    @Ignore
+    @Test
+    public void testNotIsogram() {
+        IsogramChecker iso = new IsogramChecker();
+        assertFalse(iso.isIsogram("eleven"));
+    }
+
+    @Ignore
+    @Test
+    public void testMediumLongIsogram() {
+        IsogramChecker iso = new IsogramChecker();
+        assertTrue(iso.isIsogram("subdermatoglyphic"));
+    }
+
+    @Ignore
+    @Test
+    public void testCaseInsensitive() {
+        IsogramChecker iso = new IsogramChecker();
+        assertFalse(iso.isIsogram("Alphabet"));
+    }
+
+    @Ignore
+    @Test
+    public void testIsogramWithHyphen() {
+        IsogramChecker iso = new IsogramChecker();
+        assertTrue(iso.isIsogram("thumbscrew-japingly"));
+    }
+
+    @Ignore
+    @Test
+    public void testIgnoresMultipleHyphens() {
+        IsogramChecker iso = new IsogramChecker();
+        assertTrue(iso.isIsogram("Hjelmqvist-Gryb-Zock-Pfund-Wax"));
+    }
+
+    @Ignore
+    @Test
+    public void testWorksWithGermanLetters() {
+        IsogramChecker iso = new IsogramChecker();
+        assertTrue(iso.isIsogram("Heizölrückstoßabdämpfung"));
+    }
+
+    @Ignore
+    @Test
+    public void testIgnoresSpaces() {
+        IsogramChecker iso = new IsogramChecker();
+        assertFalse(iso.isIsogram("the quick brown fox"));
+    }
+
+    @Ignore
+    @Test
+    public void testIgnoresSpaces2() {
+        IsogramChecker iso = new IsogramChecker();
+        assertTrue(iso.isIsogram("Emily Jung Schwartzkopf"));
+    }
+
+    @Ignore
+    @Test
+    public void testDuplicateAccentedLetters() {
+        IsogramChecker iso = new IsogramChecker();
+        assertFalse(iso.isIsogram("éléphant"));
+    }
+
+}

exercises/isogram/src/test/java/IsogramTest.java

-package test;
-
-import static org.junit.Assert.*;
-
-import org.junit.Ignore;
-import org.junit.Test;
-import example.IsogramChecker;
-
-public class IsogramTest {
-
-	@Test
-	public void testIsogram() {
-		IsogramChecker iso = new IsogramChecker();
-		assertTrue(iso.isIsogram("duplicates"));
-	}
-	
-	@Ignore
-	@Test
-	public void testNotIsogram() {
-		IsogramChecker iso = new IsogramChecker();
-		assertFalse(iso.isIsogram("eleven"));
-	}
-	
-	@Ignore
-	@Test
-	public void testMediumLongIsogram() {
-		IsogramChecker iso = new IsogramChecker();
-		assertTrue(iso.isIsogram("subdermatoglyphic"));
-	}
-	
-	@Ignore
-	@Test
-	public void testCaseInsensitive() {
-		IsogramChecker iso = new IsogramChecker();
-		assertFalse(iso.isIsogram("Alphabet"));
-	}
-	
-	@Ignore
-	@Test
-	public void testIsogramWithHyphen() {
-		IsogramChecker iso = new IsogramChecker();
-		assertTrue(iso.isIsogram("thumbscrew-japingly"));
-	}
-	
-	@Ignore
-	@Test
-	public void testIgnoresMultipleHyphens() {
-		IsogramChecker iso = new IsogramChecker();
-		assertTrue(iso.isIsogram("Hjelmqvist-Gryb-Zock-Pfund-Wax"));
-	}
-	
-	@Ignore
-	@Test
-	public void testWorksWithGermanLetters() {
-		IsogramChecker iso = new IsogramChecker();
-		assertTrue(iso.isIsogram("Heizölrückstoßabdämpfung"));
-	}
-	
-	@Ignore
-	@Test
-	public void testIgnoresSpaces() {
-		IsogramChecker iso = new IsogramChecker();
-		assertFalse(iso.isIsogram("the quick brown fox"));
-	}
-	
-	@Ignore
-	@Test
-	public void testIgnoresSpaces2() {
-		IsogramChecker iso = new IsogramChecker();
-		assertTrue(iso.isIsogram("Emily Jung Schwartzkopf"));
-	}
-	
-	@Ignore
-	@Test
-	public void testDuplicateAccentedLetters() {
-		IsogramChecker iso = new IsogramChecker();
-		assertFalse(iso.isIsogram("éléphant"));
-	}
-
-}