Examples of java.util.TreeMap.subMap()

java.util.TreeMap.subMap()
@throws ClassCastException {@inheritDoc} @throws NullPointerException if fromKey or toKey isnull and this map uses natural ordering, or its comparator does not permit null keys @throws IllegalArgumentException {@inheritDoc} @since 1.6

        master.put("null", null);
        Object[] entry = master.entrySet().toArray();
        assertFalse("Empty map should not contain the null-valued entry",
                    test_map.entrySet().contains(entry[0]));


        Map<String, String> submap = test_map.subMap("a","z");
        entry = master.entrySet().toArray();
        assertFalse("Empty submap should not contain the null-valued entry",
                    submap.entrySet().contains(entry[0]));


        test_map.put("null", null);

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        master.put("null", null);
        Object[] entry = master.entrySet().toArray();
        assertFalse("Empty map should not contain the null-valued entry",
                    test_map.entrySet().contains(entry[0]));


        Map<String, String> submap = test_map.subMap("a","z");
        entry = master.entrySet().toArray();
        assertFalse("Empty submap should not contain the null-valued entry",
                    submap.entrySet().contains(entry[0]));


        test_map.put("null", null);

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        TreeMap tm_null = new TreeMap();
        tm_null.put("0", 1);
        tm_null.put("1", null);
        tm_null.put("2", 2);
        SortedMap subMap = tm_null.subMap("0", "2");
        assertTrue(subMap.containsValue(null));


        subMap.remove("1");
        assertFalse(subMap.containsValue(null));
    }

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    }


    public void test_AscendingSubMapKeySet_remove() {
        TreeMap tm_rm = new TreeMap(tm);
        SortedMap subMap_startExcluded_endExcluded_rm = tm_rm.subMap(
                objArray[100].toString(), false, objArray[109].toString(),
                false);
        assertNull(subMap_startExcluded_endExcluded_rm.remove("0"));
        try {
            subMap_startExcluded_endExcluded_rm.remove(null);

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    public void test_headMap() throws Exception {
        TreeMap tree = new TreeMap();
        tree.put(new Integer(0), null);
        tree.put(new Integer(1), null);
        Map submap = tree.subMap(tree.firstKey(), tree.lastKey());
        tree.remove(tree.lastKey());
        assertEquals(submap, tree);
    }


    public void testname() throws Exception {

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        nullTree.put(new String("One"), 1);
        nullTree.put(new String("Two"), 2);
        nullTree.put(new String("Three"), 3);
        nullTree.put(new String("Four"), 4);
        nullTree.put(null, 0);
        nullTree.subMap(null, "two").size();
    }


}

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        SortedMap<String, String> sub = map.subMap("1", "3"); //$NON-NLS-1$ //$NON-NLS-2$
        assertEquals("2", sub.lastKey()); //$NON-NLS-1$
        
        TreeMap t = new TreeMap();
        try {
      SortedMap th = t.subMap(null,new Object());
      fail("Should throw a NullPointerException");
        } catch( NullPointerException npe) {
          // expected
        }
    }

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        TreeMap myTreeMap = new TreeMap();
        for (int i = 0; i < 1000; i++) {
            myTreeMap.put(i, objArray[i]);
        }
        // Test for method values() in subMaps
        Collection vals = myTreeMap.subMap(200, 400).values();
        assertTrue("Returned collection of incorrect size", vals.size() == 200);
        for (int i = 200; i < 400; i++) {
            assertTrue("Collection contains incorrect elements" + i, vals
                    .contains(objArray[i]));
        }

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        master.put("null", null);
        Object[] entry = master.entrySet().toArray();
        assertFalse("Empty map should not contain the null-valued entry",
                    test_map.entrySet().contains(entry[0]));


        Map<String, String> submap = test_map.subMap("a","z");
        entry = master.entrySet().toArray();
        assertFalse("Empty submap should not contain the null-valued entry",
                    submap.entrySet().contains(entry[0]));


        test_map.put("null", null);

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