Examples of java.util.BitSet.flip()

java.util.BitSet.flip()
Sets the bit at the specified index to the complement of its current value. @param bitIndex the index of the bit to flip. @exception IndexOutOfBoundsException if the specified index is negative. @since 1.4


      // test ranges, including possible extension
      int fromIndex, toIndex;
      fromIndex = random().nextInt(sz/2);
      toIndex = fromIndex + random().nextInt(sz - fromIndex);
      BitSet aa = (BitSet)a.clone(); aa.flip(fromIndex,toIndex);
      FixedBitSet bb = b.clone(); bb.flip(fromIndex,toIndex);


      doIterate(aa,bb, mode);   // a problem here is from flip or doIterate


      fromIndex = random().nextInt(sz/2);

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          idx = random().nextInt(sz);
          a.clear(idx);
          b.fastClear((long) idx);
          
          idx = random().nextInt(sz);
          a.flip(idx);
          b.fastFlip(idx);


          boolean val = b.flipAndGet(idx);
          boolean val2 = b.flipAndGet(idx);
          assertTrue(val != val2);

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          boolean val = b.flipAndGet(idx);
          boolean val2 = b.flipAndGet(idx);
          assertTrue(val != val2);


          idx = random().nextInt(sz);
          a.flip(idx);
          b.fastFlip((long) idx);


          val = b.flipAndGet((long) idx);
          val2 = b.flipAndGet((long) idx);
          assertTrue(val != val2);

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      // test ranges, including possible extension
      int fromIndex, toIndex;
      fromIndex = random().nextInt(sz+80);
      toIndex = fromIndex + random().nextInt((sz>>1)+1);
      BitSet aa = (BitSet)a.clone(); aa.flip(fromIndex,toIndex);
      OpenBitSet bb = b.clone(); bb.flip(fromIndex,toIndex);


      doIterate(aa,bb, mode);   // a problem here is from flip or doIterate


      fromIndex = random().nextInt(sz+80);

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    }


    BitSet singleBitDiff( BitSet x, BitSet y ) {
        BitSet t = new BitSet( x.length() );
        t.or( x );
        t.flip(0, t.size());
        t.and( y );


        switch ( t.cardinality() ) {
            case 0 : return t;
            case 1 : return t;

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    }


    BitSet singleBitDiff( BitSet x, BitSet y ) {
        BitSet t = new BitSet( x.length() );
        t.or( x );
        t.flip(0, t.size());
        t.and( y );


        switch ( t.cardinality() ) {
            case 0 : return t;
            case 1 : return t;

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    int totalCharacters = table.cardinality();
    if (totalCharacters * 2 <= DISTINCT_CHARS) {
      return precomputedPositive(totalCharacters, table, description);
    } else {
      // TODO(user): is it worth it to worry about the last character of large matchers?
      table.flip(Character.MIN_VALUE, Character.MAX_VALUE + 1);
      int negatedCharacters = DISTINCT_CHARS - totalCharacters;
      String suffix = ".negate()";
      String negatedDescription = description.endsWith(suffix)
          ? description.substring(0, description.length() - suffix.length())
          : description + suffix;

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    @GwtIncompatible("java.util.BitSet")
    @Override
    void setBits(BitSet table) {
      BitSet tmp = new BitSet();
      original.setBits(tmp);
      tmp.flip(Character.MIN_VALUE, Character.MAX_VALUE + 1);
      table.or(tmp);
    }


    @Override public CharMatcher negate() {
      return original;

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    }


    BitSet singleBitDiff( BitSet x, BitSet y ) {
        BitSet t = new BitSet( x.length() );
        t.or( x );
        t.flip(0, t.size());
        t.and( y );


        switch ( t.cardinality() ) {
            case 0 : return t;
            case 1 : return t;

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          idx = random().nextInt(sz);
          a.clear(idx);
          b.clear(idx);
          
          idx = random().nextInt(sz);
          a.flip(idx);
          b.flip(idx, idx+1);


          idx = random().nextInt(sz);
          a.flip(idx);
          b.flip(idx, idx+1);

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