String str;		do{			Scanner scanner = new Scanner(System.in);			System.out.println("请输入年利率数字部分（如年利率为8.5%，则输入8.5即可.）");			str = scanner.nextLine();			float fff = (Float.parseFloat(str)*100)/360;			System.out.println("变形前：>>>>>"+fff+"");			System.out.println("万份日收益为：Math.round>>>>>"+(double)(Math.round(fff*100)/100.0)+"元");			System.out.println("万份日收益为：format>>>>>"+String.format("%.2f",fff));			DecimalFormat df = new DecimalFormat("#.##");			System.out.println("万份日收益为：DecimalFormat>>>>>"+Double.parseDouble(df.format(fff))+"    之前>>>>>"+df.format(fff));			System.out.println("万份日收益为：double>parseString>>>>>"+Double.parseDouble(String.format("%.2f", fff)));			BigDecimal bd = new BigDecimal(fff);			BigDecimal bd2 = bd.setScale(3, BigDecimal.ROUND_HALF_UP);			System.err.println("1111万份日收益为：BigDecimal>>>>>"+bd2.toString()+"   Double.parse>>>>>"+Double.parseDouble(bd2.toString()));		}while(true);