how to round off the values after decimal points in java code example

Example 1: java round 2 decimal places

Math.round(input * 100.0) / 100.0;

Example 2: java round to 2 decimal

class round{
    public static void main(String args[]){

      double a = 123.13698;
      double roundOff = Math.round(a*100)/100;

      System.out.println(roundOff);
	}
}