Here you can find the source of format(Double number)
public static final String format(Double number)
//package com.java2s; /* /*from w ww . j ava 2s .co m*/ * Copyright (c) 2012-present Jan To?ovsk? <jan.tosovsky.cz@gmail.com> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.text.DecimalFormat; import java.text.DecimalFormatSymbols; import java.text.NumberFormat; import java.util.Locale; public class Main { private static final NumberFormat NUMBER_FORMAT = new DecimalFormat("###.##", new DecimalFormatSymbols(Locale.ENGLISH)); public static final String format(Double number) { return NUMBER_FORMAT.format(number); } }