Changed isEmpty to accept multiple variables

src/zutil/ObjectUtil.java

@@ -32,10 +32,25 @@ import java.util.Map;
  */
 public class ObjectUtil {
 
+    /**
+     * @return true if all given Objects are null or empty String, List or Map
+     */
+    public static boolean isEmpty(Object... objs) {
+        if (isEmptyCheck(objs))
+            return true;
+
+        for (Object obj : objs) {
+            if (!isEmptyCheck(obj))
+                return false;
+        }
+
+        return true;
+    }
+
     /**
      * @return true if obj is null or empty String, List, Map
      */
-    public static boolean isEmpty(Object obj) {
+    private static boolean isEmptyCheck(Object obj) {
         if (obj == null)
             return true;
 

test/zutil/ObjectUtilTest.java

@@ -32,9 +32,29 @@ import static org.junit.Assert.*;
 
 public class ObjectUtilTest {
 
+    @Test
+    public void isEmptyArr() {
+        assertTrue(ObjectUtil.isEmpty());
+        assertTrue(ObjectUtil.isEmpty(null, null));
+        assertTrue(ObjectUtil.isEmpty("", "", ""));
+        assertTrue(ObjectUtil.isEmpty(new StringBuffer(), ""));
+        assertTrue(ObjectUtil.isEmpty("", new StringBuilder()));
+        assertTrue(ObjectUtil.isEmpty(new ArrayList<>(), ""));
+        assertTrue(ObjectUtil.isEmpty(new LinkedList<>(), ""));
+        assertTrue(ObjectUtil.isEmpty(new HashMap<>(), ""));
+        assertTrue(ObjectUtil.isEmpty(new Hashtable<>(), ""));
+
+
+        assertFalse(ObjectUtil.isEmpty(" ", ""));
+        assertFalse(ObjectUtil.isEmpty("a", ""));
+        assertFalse(ObjectUtil.isEmpty("", new StringBuilder("a")));
+        assertFalse(ObjectUtil.isEmpty("", new StringBuffer("a")));
+        assertFalse(ObjectUtil.isEmpty("", Arrays.asList(1, 2, 3)));
+    }
+
     @Test
     public void isEmpty() {
-        assertTrue(ObjectUtil.isEmpty(null));
+        assertTrue(ObjectUtil.isEmpty((String) null));
         assertTrue(ObjectUtil.isEmpty(""));
         assertTrue(ObjectUtil.isEmpty(new StringBuffer()));
         assertTrue(ObjectUtil.isEmpty(new StringBuilder()));