Examples of java.util.AbstractMap.keySet()

java.util.AbstractMap.keySet()
{@inheritDoc}
This implementation returns a set that subclasses {@link AbstractSet}. The subclass's iterator method returns a "wrapper object" over this map's entrySet() iterator. The size method delegates to this map's size method and the contains method delegates to this map's containsKey method.
The set is created the first time this method is called, and returned in response to all subsequent calls. No synchronization is performed, so there is a slight chance that multiple calls to this method will not all return the same set.

    // values() and keySet() on the cloned() map should be different
    assertEquals("values() was not cloned", 
        "value2", values2.iterator().next());
    map2.clear();
    map2.put("key2", "value3");
    Set key2 = map2.keySet();
    assertTrue("keySet() is identical", key2 != keys);
    assertEquals("keySet() was not cloned", 
        "key2", key2.iterator().next());
        
        // regresion test for HARMONY-4603

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        // values() and keySet() on the cloned() map should be different
        assertEquals("values() was not cloned", "value2", values2.iterator()
                .next());
        map2.clear();
        map2.put("key2", "value3");
        Set key2 = map2.keySet();
        assertTrue("keySet() is identical", key2 != keys);
        assertEquals("keySet() was not cloned", "key2", key2.iterator().next());
    }


    /**

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    // values() and keySet() on the cloned() map should be different
    assertEquals("values() was not cloned", 
        "value2", values2.iterator().next());
    map2.clear();
    map2.put("key2", "value3");
    Set key2 = map2.keySet();
    assertTrue("keySet() is identical", key2 != keys);
    assertEquals("keySet() was not cloned", 
        "key2", key2.iterator().next());
        
        // regresion test for HARMONY-4603

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        // values() and keySet() on the cloned() map should be different
        assertEquals("values() was not cloned", "value2", values2.iterator()
                .next());
        map2.clear();
        map2.put("key2", "value3");
        Set key2 = map2.keySet();
        assertTrue("keySet() is identical", key2 != keys);
        assertEquals("keySet() was not cloned", "key2", key2.iterator().next());
    }


    /**

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    // values() and keySet() on the cloned() map should be different
    assertEquals("values() was not cloned", 
        "value2", values2.iterator().next());
    map2.clear();
    map2.put("key2", "value3");
    Set key2 = map2.keySet();
    assertTrue("keySet() is identical", key2 != keys);
    assertEquals("keySet() was not cloned", 
        "key2", key2.iterator().next());
  }

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  /**
   * @tests java.util.AbstractMap#keySet()
   */
  public void test_keySet() {
    AbstractMap map1 = new HashMap(0);
    assertSame("HashMap(0)", map1.keySet(), map1.keySet());


    AbstractMap map2 = new HashMap(10);
    assertSame("HashMap(10)", map2.keySet(), map2.keySet());


    Map map3 = Collections.EMPTY_MAP;

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  /**
   * @tests java.util.AbstractMap#keySet()
   */
  public void test_keySet() {
    AbstractMap map1 = new HashMap(0);
    assertSame("HashMap(0)", map1.keySet(), map1.keySet());


    AbstractMap map2 = new HashMap(10);
    assertSame("HashMap(10)", map2.keySet(), map2.keySet());


    Map map3 = Collections.EMPTY_MAP;

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  public void test_keySet() {
    AbstractMap map1 = new HashMap(0);
    assertSame("HashMap(0)", map1.keySet(), map1.keySet());


    AbstractMap map2 = new HashMap(10);
    assertSame("HashMap(10)", map2.keySet(), map2.keySet());


    Map map3 = Collections.EMPTY_MAP;
    assertSame("EMPTY_MAP", map3.keySet(), map3.keySet());


    AbstractMap map4 = new IdentityHashMap(1);

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  public void test_keySet() {
    AbstractMap map1 = new HashMap(0);
    assertSame("HashMap(0)", map1.keySet(), map1.keySet());


    AbstractMap map2 = new HashMap(10);
    assertSame("HashMap(10)", map2.keySet(), map2.keySet());


    Map map3 = Collections.EMPTY_MAP;
    assertSame("EMPTY_MAP", map3.keySet(), map3.keySet());


    AbstractMap map4 = new IdentityHashMap(1);

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    Map map3 = Collections.EMPTY_MAP;
    assertSame("EMPTY_MAP", map3.keySet(), map3.keySet());


    AbstractMap map4 = new IdentityHashMap(1);
    assertSame("IdentityHashMap", map4.keySet(), map4.keySet());


    AbstractMap map5 = new LinkedHashMap(122);
    assertSame("LinkedHashMap", map5.keySet(), map5.keySet());


    AbstractMap map6 = new TreeMap();

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