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diff --git a/harmony-tests/src/test/java/org/apache/harmony/tests/java/util/LinkedHashSetTest.java b/harmony-tests/src/test/java/org/apache/harmony/tests/java/util/LinkedHashSetTest.java
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+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.harmony.tests.java.util;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.LinkedHashSet;
+import java.util.Set;
+import java.util.Vector;
+
+/**
+ * java.util.LinkedHashSet
+ */
+
+public class LinkedHashSetTest extends junit.framework.TestCase {
+
+    LinkedHashSet hs;
+
+    Object[] objArray;
+
+    /**
+     * java.util.LinkedHashSet#LinkedHashSet()
+     */
+    public void test_Constructor() {
+        // Test for method java.util.LinkedHashSet()
+        LinkedHashSet hs2 = new LinkedHashSet();
+        assertEquals("Created incorrect LinkedHashSet", 0, hs2.size());
+    }
+
+    /**
+     * java.util.LinkedHashSet#LinkedHashSet(int)
+     */
+    public void test_ConstructorI() {
+        // Test for method java.util.LinkedHashSet(int)
+        LinkedHashSet hs2 = new LinkedHashSet(5);
+        assertEquals("Created incorrect LinkedHashSet", 0, hs2.size());
+        try {
+            new LinkedHashSet(-1);
+            fail("IllegalArgumentException expected");
+        } catch (IllegalArgumentException e) {
+            //expected
+        }
+    }
+
+    /**
+     * java.util.LinkedHashSet#LinkedHashSet(int, float)
+     */
+    public void test_ConstructorIF() {
+        // Test for method java.util.LinkedHashSet(int, float)
+        LinkedHashSet hs2 = new LinkedHashSet(5, (float) 0.5);
+        assertEquals("Created incorrect LinkedHashSet", 0, hs2.size());
+
+        try {
+            new LinkedHashSet(-1, 0.5f);
+            fail("IllegalArgumentException expected");
+        } catch (IllegalArgumentException e) {
+            //expected
+        }
+
+        try {
+            new LinkedHashSet(1, -0.5f);
+            fail("IllegalArgumentException expected");
+        } catch (IllegalArgumentException e) {
+            //expected
+        }
+
+        try {
+            new LinkedHashSet(1, 0f);
+            fail("IllegalArgumentException expected");
+        } catch (IllegalArgumentException e) {
+            //expected
+        }
+    }
+
+    /**
+     * java.util.LinkedHashSet#LinkedHashSet(java.util.Collection)
+     */
+    public void test_ConstructorLjava_util_Collection() {
+        // Test for method java.util.LinkedHashSet(java.util.Collection)
+        LinkedHashSet hs2 = new LinkedHashSet(Arrays.asList(objArray));
+        for (int counter = 0; counter < objArray.length; counter++)
+            assertTrue("LinkedHashSet does not contain correct elements", hs
+                    .contains(objArray[counter]));
+        assertTrue("LinkedHashSet created from collection incorrect size", hs2
+                .size() == objArray.length);
+
+        try {
+            new LinkedHashSet(null);
+            fail("NullPointerException expected");
+        } catch (NullPointerException e) {
+            //expected
+        }
+    }
+
+    /**
+     * java.util.LinkedHashSet#add(java.lang.Object)
+     */
+    public void test_addLjava_lang_Object() {
+        // Test for method boolean java.util.LinkedHashSet.add(java.lang.Object)
+        int size = hs.size();
+        hs.add(new Integer(8));
+        assertTrue("Added element already contained by set", hs.size() == size);
+        hs.add(new Integer(-9));
+        assertTrue("Failed to increment set size after add",
+                hs.size() == size + 1);
+        assertTrue("Failed to add element to set", hs.contains(new Integer(-9)));
+    }
+
+    /**
+     * java.util.LinkedHashSet#clear()
+     */
+    public void test_clear() {
+        // Test for method void java.util.LinkedHashSet.clear()
+        Set orgSet = (Set) hs.clone();
+        hs.clear();
+        Iterator i = orgSet.iterator();
+        assertEquals("Returned non-zero size after clear", 0, hs.size());
+        while (i.hasNext())
+            assertTrue("Failed to clear set", !hs.contains(i.next()));
+    }
+
+    /**
+     * java.util.LinkedHashSet#clone()
+     */
+    public void test_clone() {
+        // Test for method java.lang.Object java.util.LinkedHashSet.clone()
+        LinkedHashSet hs2 = (LinkedHashSet) hs.clone();
+        assertTrue("clone returned an equivalent LinkedHashSet", hs != hs2);
+        assertTrue("clone did not return an equal LinkedHashSet", hs
+                .equals(hs2));
+    }
+
+    /**
+     * java.util.LinkedHashSet#contains(java.lang.Object)
+     */
+    public void test_containsLjava_lang_Object() {
+        // Test for method boolean
+        // java.util.LinkedHashSet.contains(java.lang.Object)
+        assertTrue("Returned false for valid object", hs.contains(objArray[90]));
+        assertTrue("Returned true for invalid Object", !hs
+                .contains(new Object()));
+
+        LinkedHashSet s = new LinkedHashSet();
+        s.add(null);
+        assertTrue("Cannot handle null", s.contains(null));
+    }
+
+    /**
+     * java.util.LinkedHashSet#isEmpty()
+     */
+    public void test_isEmpty() {
+        // Test for method boolean java.util.LinkedHashSet.isEmpty()
+        assertTrue("Empty set returned false", new LinkedHashSet().isEmpty());
+        assertTrue("Non-empty set returned true", !hs.isEmpty());
+    }
+
+    /**
+     * java.util.LinkedHashSet#iterator()
+     */
+    public void test_iterator() {
+        // Test for method java.util.Iterator java.util.LinkedHashSet.iterator()
+        Iterator i = hs.iterator();
+        int x = 0;
+        int j;
+        for (j = 0; i.hasNext(); j++) {
+            Object oo = i.next();
+            if (oo != null) {
+                Integer ii = (Integer) oo;
+                assertTrue("Incorrect element found", ii.intValue() == j);
+            } else {
+                assertTrue("Cannot find null", hs.contains(oo));
+            }
+            ++x;
+        }
+        assertTrue("Returned iteration of incorrect size", hs.size() == x);
+
+        LinkedHashSet s = new LinkedHashSet();
+        s.add(null);
+        assertNull("Cannot handle null", s.iterator().next());
+    }
+
+    /**
+     * java.util.LinkedHashSet#remove(java.lang.Object)
+     */
+    public void test_removeLjava_lang_Object() {
+        // Test for method boolean
+        // java.util.LinkedHashSet.remove(java.lang.Object)
+        int size = hs.size();
+        hs.remove(new Integer(98));
+        assertTrue("Failed to remove element", !hs.contains(new Integer(98)));
+        assertTrue("Failed to decrement set size", hs.size() == size - 1);
+
+        LinkedHashSet s = new LinkedHashSet();
+        s.add(null);
+        assertTrue("Cannot handle null", s.remove(null));
+    }
+
+    /**
+     * java.util.LinkedHashSet#size()
+     */
+    public void test_size() {
+        // Test for method int java.util.LinkedHashSet.size()
+        assertTrue("Returned incorrect size", hs.size() == (objArray.length + 1));
+        hs.clear();
+        assertEquals("Cleared set returned non-zero size", 0, hs.size());
+    }
+
+    class Mock_LinkedHashSet extends LinkedHashSet {
+        @Override
+        public boolean retainAll(Collection c) {
+            throw new UnsupportedOperationException();
+        }
+    }
+
+    public void test_retainAllLjava_util_Collection() {
+        LinkedHashSet<Integer> lhs = new LinkedHashSet<Integer>();
+        Vector v = new Vector<Float>();
+        v.add(new Float(3.14));
+        lhs.add(new Integer(1));
+        assertEquals(1, lhs.size());
+        lhs.retainAll(v);
+        assertEquals(0, lhs.size());
+        v = new Vector<Integer>();
+        v.add(new Integer(1));
+        v.add(new Integer(2));
+        v.add(new Integer(3));
+        v.add(new Integer(4));
+        v.add(new Integer(5));
+        v.add(new Integer(6));
+        lhs.add(new Integer(1));
+        lhs.add(new Integer(6));
+        lhs.add(new Integer(7));
+        lhs.add(new Integer(8));
+        lhs.add(new Integer(9));
+        lhs.add(new Integer(10));
+        lhs.add(new Integer(11));
+        lhs.add(new Integer(12));
+        lhs.add(new Integer(13));
+        assertEquals(9, lhs.size());
+        lhs.retainAll(v);
+        assertEquals(2, lhs.size());
+
+        try {
+            lhs.retainAll(null);
+            fail("NullPointerException expected");
+        } catch (NullPointerException e) {
+            //expected
+        }
+
+        lhs = new Mock_LinkedHashSet();
+
+        try {
+            lhs.retainAll(v);
+            fail("UnsupportedOperationException expected");
+        } catch (UnsupportedOperationException e) {
+            //expected
+        }
+    }
+
+    public void test_toArray() {
+        LinkedHashSet<Integer> lhs = new LinkedHashSet<Integer>();
+        lhs.add(new Integer(1));
+        lhs.add(new Integer(6));
+        lhs.add(new Integer(7));
+        lhs.add(new Integer(8));
+        lhs.add(new Integer(9));
+        lhs.add(new Integer(10));
+        lhs.add(new Integer(11));
+        lhs.add(new Integer(12));
+        lhs.add(new Integer(13));
+
+        Object[] o = lhs.toArray();
+        for (int i = 0; i < o.length; i++) {
+            assertTrue(lhs.contains(o[i]));
+        }
+        assertEquals(lhs.size(), o.length);
+    }
+
+    public void test_toArray$Ljava_lang_Object() {
+        LinkedHashSet<Integer> lhs = new LinkedHashSet<Integer>();
+        lhs.add(new Integer(1));
+        lhs.add(new Integer(6));
+        lhs.add(new Integer(7));
+        lhs.add(new Integer(8));
+        lhs.add(new Integer(9));
+        lhs.add(new Integer(10));
+        lhs.add(new Integer(11));
+        lhs.add(new Integer(12));
+        lhs.add(new Integer(13));
+
+        Object[] o1 = new Object[lhs.size()];
+        Object[] o2 = new Double[lhs.size()];
+        lhs.toArray(o1);
+        for (int i = 0; i < o1.length; i++) {
+            assertTrue(lhs.contains(o1[i]));
+        }
+
+        try {
+            lhs.toArray(null);
+            fail("NullPointerException expected");
+        } catch (NullPointerException e) {
+            //expected
+        }
+
+        try {
+            lhs.toArray(o2);
+            fail("ArrayStoreException expected");
+        } catch (ArrayStoreException e) {
+            //expected
+        }
+    }
+
+    /**
+     * Sets up the fixture, for example, open a network connection. This method
+     * is called before a test is executed.
+     */
+    protected void setUp() {
+        objArray = new Object[1000];
+        for (int i = 0; i < objArray.length; i++)
+            objArray[i] = new Integer(i);
+
+        hs = new LinkedHashSet();
+        for (int i = 0; i < objArray.length; i++)
+            hs.add(objArray[i]);
+        hs.add(null);
+    }
+
+    /**
+     * Tears down the fixture, for example, close a network connection. This
+     * method is called after a test is executed.
+     */
+    protected void tearDown() {
+        objArray = null;
+        hs = null;
+    }
+}