Examples of java.util.BitSet.previousSetBit()

java.util.BitSet.previousSetBit()
ate on index i here }} @param fromIndex the index to start checking from (inclusive) @return the index of the previous set bit, or {@code -1} if thereis no such bit @throws IndexOutOfBoundsException if the specified index is lessthan {@code -1} @since 1.7

        assertEquals(62, bs.previousSetBit(62));
        assertEquals(32, bs.previousSetBit(32));
        assertEquals(31, bs.previousSetBit(31));
        assertEquals(18, bs.previousSetBit(30));
        assertEquals(18, bs.previousSetBit(18));
        assertEquals(17, bs.previousSetBit(17));
        assertEquals(16, bs.previousSetBit(16));
        assertEquals(9, bs.previousSetBit(15));
        assertEquals(9, bs.previousSetBit(9));
        assertEquals(2, bs.previousSetBit(2));
        assertEquals(-1, bs.previousSetBit(1));

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        assertEquals(32, bs.previousSetBit(32));
        assertEquals(31, bs.previousSetBit(31));
        assertEquals(18, bs.previousSetBit(30));
        assertEquals(18, bs.previousSetBit(18));
        assertEquals(17, bs.previousSetBit(17));
        assertEquals(16, bs.previousSetBit(16));
        assertEquals(9, bs.previousSetBit(15));
        assertEquals(9, bs.previousSetBit(9));
        assertEquals(2, bs.previousSetBit(2));
        assertEquals(-1, bs.previousSetBit(1));
        assertEquals(-1, bs.previousSetBit(0));

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        assertEquals(31, bs.previousSetBit(31));
        assertEquals(18, bs.previousSetBit(30));
        assertEquals(18, bs.previousSetBit(18));
        assertEquals(17, bs.previousSetBit(17));
        assertEquals(16, bs.previousSetBit(16));
        assertEquals(9, bs.previousSetBit(15));
        assertEquals(9, bs.previousSetBit(9));
        assertEquals(2, bs.previousSetBit(2));
        assertEquals(-1, bs.previousSetBit(1));
        assertEquals(-1, bs.previousSetBit(0));
    }

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        assertEquals(18, bs.previousSetBit(30));
        assertEquals(18, bs.previousSetBit(18));
        assertEquals(17, bs.previousSetBit(17));
        assertEquals(16, bs.previousSetBit(16));
        assertEquals(9, bs.previousSetBit(15));
        assertEquals(9, bs.previousSetBit(9));
        assertEquals(2, bs.previousSetBit(2));
        assertEquals(-1, bs.previousSetBit(1));
        assertEquals(-1, bs.previousSetBit(0));
    }

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        assertEquals(18, bs.previousSetBit(18));
        assertEquals(17, bs.previousSetBit(17));
        assertEquals(16, bs.previousSetBit(16));
        assertEquals(9, bs.previousSetBit(15));
        assertEquals(9, bs.previousSetBit(9));
        assertEquals(2, bs.previousSetBit(2));
        assertEquals(-1, bs.previousSetBit(1));
        assertEquals(-1, bs.previousSetBit(0));
    }


    @Test

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        assertEquals(17, bs.previousSetBit(17));
        assertEquals(16, bs.previousSetBit(16));
        assertEquals(9, bs.previousSetBit(15));
        assertEquals(9, bs.previousSetBit(9));
        assertEquals(2, bs.previousSetBit(2));
        assertEquals(-1, bs.previousSetBit(1));
        assertEquals(-1, bs.previousSetBit(0));
    }


    @Test
    public void previousClearBitFound() {

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        assertEquals(16, bs.previousSetBit(16));
        assertEquals(9, bs.previousSetBit(15));
        assertEquals(9, bs.previousSetBit(9));
        assertEquals(2, bs.previousSetBit(2));
        assertEquals(-1, bs.previousSetBit(1));
        assertEquals(-1, bs.previousSetBit(0));
    }


    @Test
    public void previousClearBitFound() {
        BitSet bs = new BitSet();

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