java.text.NumberFormat nf = NumberFormat.getInstance();
nf.setMaximumFractionDigits(2);
nf.setMinimumFractionDigits(2);
String result = nf.format(YourNumber);
nf.setMaximumFractionDigits(2);
nf.setMinimumFractionDigits(2);
String result = nf.format(YourNumber);
就再加上float resultNum = Float.parseFloat(result) 或double resultNum = Double.parseDouble(result);