I’m using DecimalFormat to format doubles to 2 decimal places like this:
DecimalFormat dec = new DecimalFormat("#.##"); double rawPercent = ( (double)(count.getCount().intValue()) / (double)(total.intValue()) ) * 100.00; double percentage = Double.valueOf(dec.format(rawPercent));
It works, but if i have a number like 20, it gives me this:
and I want this:
The DecimalFormat class is for transforming a decimal numeric value into a String. In your example, you are taking the String that comes from the format( ) method and putting it back into a double variable. If you are then outputting that double variable you would not see the formatted string. See the code example below and its output:
int count = 10; int total = 20; DecimalFormat dec = new DecimalFormat("#.00"); double rawPercent = ( (double)(count) / (double)(total) ) * 100.00; double percentage = Double.valueOf(dec.format(rawPercent)); System.out.println("DF Version: " + dec.format(rawPercent)); System.out.println("double version: " + percentage);
"DF Version: 50.00" "double version: 50.0"