round a double to 1 decimal place in java code example

Example 1: double round java integer

int a = (int) Math.round(doubleVar);

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);
	}
}