new SubstringComparator（""）不支持汉字么

[大章鱼oO]

SubstringComparator comp = new SubstringComparator("news");//为什么这里不能为汉字
		SingleColumnValueFilter filter = new SingleColumnValueFilter(FAMILY_NAME.getBytes(), COLUMN.getBytes(),      CompareOp.EQUAL, comp);
		scan.setFilter(filter);
		scan.setCaching(200);
		scan.setCacheBlocks(false);