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arraz/src/main/java/Arraz.java

-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.Set;
+import java.util.*;
 
 public class Arraz {
 
     }
 
     public Integer[] removeDupesFromArray(Integer[] array){
-        Set<Integer> integerSet = new HashSet<>();
-        integerSet.addAll(Arrays.asList(array));
-        Integer[] integers = new Integer[integerSet.size()];
-        return integerSet.toArray(integers);
+        Set<Integer> integerSet = new LinkedHashSet<>(Arrays.asList(array));
+        return integerSet.toArray(new Integer[0]);
     }
 
 }

arraz/src/test/java/ArrazTest.java

         Integer[] array1 = new Integer[]{1,3 ,4, 3, 7, 7, 10};
         Integer[] expected = new Integer[]{1, 3, 4, 7, 10};
         Integer[] actual = testArraz.removeDupesFromArray(array1);
+        System.out.println(Arrays.toString(actual));
 
         Assert.assertArrayEquals(expected, actual);
     }
 
     @Test
     public void testRemoveDupesFromArray2(){
-        Integer[] array1 = new Integer[]{5, 1, 1, 1, 1 ,1};
+        Integer[] array1 = new Integer[]{5, 1, 5, 5, 5 ,5};
         Integer[] expected = new Integer[]{5, 1};
         Integer[] actual = testArraz.removeDupesFromArray(array1);
+        System.out.println(Arrays.toString(actual));
 
         Assert.assertArrayEquals(expected, actual);
     }
+
+//    @Test
+//    public void testFind2ndLargestFromArray1(){
+//        double expected = 38.4;
+//        double actual = testArraz.find2ndLargestFromArray();
+//
+//        Assert.assertEquals(expected, actual, .01);
+//    }
+//
+//    @Test
+//    public void testFind2ndLargestFromArray2(){
+//
+//    }
 }