Examples of java.util.NavigableSet.subSet()

java.util.NavigableSet.subSet()
Returns a view of the portion of this set whose elements range from {@code fromElement} to {@code toElement}. If {@code fromElement} and{@code toElement} are equal, the returned set is empty unless {@code fromExclusive} and {@code toExclusive} are both true. The returned setis backed by this set, so changes in the returned set are reflected in this set, and vice-versa. The returned set supports all optional set operations that this set supports.
The returned set will throw an {@code IllegalArgumentException}on an attempt to insert an element outside its range. @param fromElement low endpoint of the returned set @param fromInclusive {@code true} if the low endpointis to be included in the returned view @param toElement high endpoint of the returned set @param toInclusive {@code true} if the high endpointis to be included in the returned view @return a view of the portion of this set whose elements range from{@code fromElement}, inclusive, to {@code toElement}, exclusive @throws ClassCastException if {@code fromElement} and{@code toElement} cannot be compared to one another using thisset's comparator (or, if the set has no comparator, using natural ordering). Implementations may, but are not required to, throw this exception if {@code fromElement} or{@code toElement} cannot be compared to elements currently inthe set. @throws NullPointerException if {@code fromElement} or{@code toElement} is null and this set doesnot permit null elements @throws IllegalArgumentException if {@code fromElement} isgreater than {@code toElement}; or if this set itself has a restricted range, and {@code fromElement} or{@code toElement} lies outside the bounds of the range.

        keySet = tm.headMap(key, true).navigableKeySet();
        Iterator iterator = keySet.iterator();
        startKey = (String) iterator.next();
        endKey = (String) iterator.next();


        subSet = keySet.subSet(startKey, endKey);
        assertEquals(1, subSet.size());
        subSetIterator = subSet.iterator();
        assertEquals(new Integer(0).toString(), subSetIterator.next());
        try {
            subSetIterator.next();

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            fail("should throw NoSuchElementException");
        } catch (NoSuchElementException e) {
            // Expected
        }


        subSet = keySet.subSet(startKey, false, endKey, false);
        assertEquals(0, subSet.size());


        subSet = keySet.subSet(startKey, false, endKey, true);
        assertEquals(1, subSet.size());
        subSetIterator = subSet.iterator();

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        }


        subSet = keySet.subSet(startKey, false, endKey, false);
        assertEquals(0, subSet.size());


        subSet = keySet.subSet(startKey, false, endKey, true);
        assertEquals(1, subSet.size());
        subSetIterator = subSet.iterator();
        assertEquals(new Integer(1).toString(), subSetIterator.next());
        try {
            subSetIterator.next();

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            fail("should throw NoSuchElementException");
        } catch (NoSuchElementException e) {
            // Expected
        }


        subSet = keySet.subSet(startKey, true, endKey, false);
        assertEquals(1, subSet.size());
        subSetIterator = subSet.iterator();
        assertEquals(new Integer(0).toString(), subSetIterator.next());
        try {
            subSetIterator.next();

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            fail("should throw NoSuchElementException");
        } catch (NoSuchElementException e) {
            // Expected
        }


        subSet = keySet.subSet(startKey, true, endKey, true);
        assertEquals(2, subSet.size());
        subSetIterator = subSet.iterator();
        assertEquals(new Integer(0).toString(), subSetIterator.next());
        assertEquals(new Integer(1).toString(), subSetIterator.next());
        try {

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        } catch (NoSuchElementException e) {
            // Expected
        }


        try {
            keySet.subSet(null, null);
            fail("should throw NPE");
        } catch (NullPointerException e) {
            // Expected
        }

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        } catch (NullPointerException e) {
            // Expected
        }


        try {
            keySet.subSet(null, false, null, false);
            fail("should throw NPE");
        } catch (NullPointerException e) {
            // Expected
        }

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        } catch (NullPointerException e) {
            // Expected
        }


        try {
            keySet.subSet(null, false, null, true);
            fail("should throw NPE");
        } catch (NullPointerException e) {
            // Expected
        }

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        } catch (NullPointerException e) {
            // Expected
        }


        try {
            keySet.subSet(null, true, null, false);
            fail("should throw NPE");
        } catch (NullPointerException e) {
            // Expected
        }

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        } catch (NullPointerException e) {
            // Expected
        }


        try {
            keySet.subSet(null, true, null, true);
            fail("should throw NPE");
        } catch (NullPointerException e) {
            // Expected
        }

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