<NME> SetUtilTest.java
<BEF> ADDFILE
<MSG> add class SetUtil

<DFF> @@ -0,0 +1,22 @@
+package edu.neu.ccs.pyramid.util;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import static org.junit.Assert.*;
+
+public class SetUtilTest {
+    public static void main(String[] args) {
+        Set<Integer> set1 = new HashSet<>();
+        Set<Integer> set2 = new HashSet<>();
+        set1.add(1);
+        set1.add(2);
+        set1.add(3);
+        set2.add(2);
+        set2.add(3);
+        set2.add(4);
+        System.out.println(SetUtil.union(set1,set2));
+        System.out.println(SetUtil.intersect(set1,set2));
+    }
+
+}
\ No newline at end of file

add class SetUtil