人生有三重境界

import java.text.NumberFormat;

/**
* @author caimaof
*
*/
public class GetDoubleApproximation {

public static double getDoubleApproximation(double input,int digits){
double result = 0;
NumberFormat format = NumberFormat.getInstance();
format.setMaximumFractionDigits(digits);//指定四舍五入的位数

String temp = format.format(input);
result = Double.parseDouble(temp);

return result;
}

public static void main(String[] args) {
System.out.println(GetDoubleApproximation.getDoubleApproximation(1.35672, 3));
}
}