用DecimalFormat 返回的是String格式的.
float num = 0.012312123;
DecimalFormat mFormat = new DecimalFormat(“.00”);
String formatNum = mFormat .format(num );
formatNum的值爲“0.01”.
用DecimalFormat 返回的是String格式的.
float num = 0.012312123;
DecimalFormat mFormat = new DecimalFormat(“.00”);
String formatNum = mFormat .format(num );
formatNum的值爲“0.01”.