Java tutorial
//package com.java2s; public class Main { /** * Returns a number rounded off to the given number of decimals. * * @param value the value to round off. * @param decimals the number of decimals. * @return a number rounded off to the given number of decimals. */ public static double getRounded(double value, int decimals) { final double factor = Math.pow(10, decimals); return Math.round(value * factor) / factor; } /** * Returns a rounded off number. * <p/> * <ul> * <li>If value is exclusively between 1 and -1 it will have 2 decimals.</li> * <li>If value if greater or equal to 1 the value will have 1 decimal.</li> * </ul> * * @param value the value to round off. * @return a rounded off number. */ public static double getRounded(double value) { if (value < 1d && value > -1d) { return getRounded(value, 2); } else { return getRounded(value, 1); } } }