Examples of java.util.BitSet.previousClearBit()

java.util.BitSet.previousClearBit()
Returns the index of the nearest bit that is set to {@code false}that occurs on or before the specified starting index. If no such bit exists, or if {@code -1} is given as thestarting index, then {@code -1} is returned. @param fromIndex the index to start checking from (inclusive) @return the index of the previous clear bit, or {@code -1} if thereis no such bit @throws IndexOutOfBoundsException if the specified index is lessthan {@code -1} @since 1.7

        assertEquals(20, bs.previousClearBit(20));
        assertEquals(19, bs.previousClearBit(19));
        assertEquals(15, bs.previousClearBit(17));
        assertEquals(15, bs.previousClearBit(15));
        assertEquals(-1, bs.previousClearBit(9));
        assertEquals(-1, bs.previousClearBit(1));
        assertEquals(-1, bs.previousClearBit(0));
    }
}

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        assertEquals(19, bs.previousClearBit(19));
        assertEquals(15, bs.previousClearBit(17));
        assertEquals(15, bs.previousClearBit(15));
        assertEquals(-1, bs.previousClearBit(9));
        assertEquals(-1, bs.previousClearBit(1));
        assertEquals(-1, bs.previousClearBit(0));
    }
}

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        BitSet bs = new BitSet();
        bs.set(0, 10);
        bs.set(16, 19);
        bs.set(31, 64);
        bs.set(96, 98);
        assertEquals(100, bs.previousClearBit(100));
        assertEquals(98, bs.previousClearBit(98));
        assertEquals(95, bs.previousClearBit(97));
        assertEquals(95, bs.previousClearBit(95));
        assertEquals(64, bs.previousClearBit(64));
        assertEquals(30, bs.previousClearBit(63));

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        bs.set(0, 10);
        bs.set(16, 19);
        bs.set(31, 64);
        bs.set(96, 98);
        assertEquals(100, bs.previousClearBit(100));
        assertEquals(98, bs.previousClearBit(98));
        assertEquals(95, bs.previousClearBit(97));
        assertEquals(95, bs.previousClearBit(95));
        assertEquals(64, bs.previousClearBit(64));
        assertEquals(30, bs.previousClearBit(63));
        assertEquals(30, bs.previousClearBit(32));

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        bs.set(16, 19);
        bs.set(31, 64);
        bs.set(96, 98);
        assertEquals(100, bs.previousClearBit(100));
        assertEquals(98, bs.previousClearBit(98));
        assertEquals(95, bs.previousClearBit(97));
        assertEquals(95, bs.previousClearBit(95));
        assertEquals(64, bs.previousClearBit(64));
        assertEquals(30, bs.previousClearBit(63));
        assertEquals(30, bs.previousClearBit(32));
        assertEquals(30, bs.previousClearBit(31));

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        bs.set(31, 64);
        bs.set(96, 98);
        assertEquals(100, bs.previousClearBit(100));
        assertEquals(98, bs.previousClearBit(98));
        assertEquals(95, bs.previousClearBit(97));
        assertEquals(95, bs.previousClearBit(95));
        assertEquals(64, bs.previousClearBit(64));
        assertEquals(30, bs.previousClearBit(63));
        assertEquals(30, bs.previousClearBit(32));
        assertEquals(30, bs.previousClearBit(31));
        assertEquals(30, bs.previousClearBit(30));

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        bs.set(96, 98);
        assertEquals(100, bs.previousClearBit(100));
        assertEquals(98, bs.previousClearBit(98));
        assertEquals(95, bs.previousClearBit(97));
        assertEquals(95, bs.previousClearBit(95));
        assertEquals(64, bs.previousClearBit(64));
        assertEquals(30, bs.previousClearBit(63));
        assertEquals(30, bs.previousClearBit(32));
        assertEquals(30, bs.previousClearBit(31));
        assertEquals(30, bs.previousClearBit(30));
        assertEquals(29, bs.previousClearBit(29));

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