Java transform format String

I'm still a novice in Java. I wonder if there is any way to format double without rounding?

double n = 0.12876543;
String s = String.format("%1$1.2f",n);

If I print to the system, it will return 0.13 instead of the exact 0.12 Now I think of a solution, but I wonder if there is a better way to do it This is my simple solution

double n = 0.12876543;
double n =  Double.parseDouble(String.format(("%1$1.2f",n));

Any other ideas or solutions?

Solution

An elegant solution is to use setroundingmode with decimal format It sets the roundingmode appropriately

For example:

// Your decimal value
double n = 0.12876543;
// Decimal Formatting
DecimalFormat curDf = new DecimalFormat(".00");
// This will set the RoundingMode
curDf.setRoundingMode(RoundingMode.DOWN);
// Print statement
System.out.println(curDf.format(n));

Output:

0.12

In addition, if you want to set another format to a string, you can always change the double value to a string:

// Your decimal value
double n = 0.12876543;
// Decimal Formatting
DecimalFormat curDf = new DecimalFormat(".00");
// This will set the RoundingMode
curDf.setRoundingMode(RoundingMode.DOWN);
// Convert to string for any additional formatting
String curString = String.valueOf(curDf.format(n));
// Print statement
System.out.println(curString);

Output:

0.12

Please refer to similar solutions here: https://stackoverflow.com/a/8560708/4085019