Here you can find the source of percentFormat(final double value)
public static String percentFormat(final double value)
//package com.java2s; /*//from ww w . j a v a 2 s . c o m * Copyright (C) 2017 Dennis Neufeld * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.text.NumberFormat; public class Main { public static String percentFormat(final double value) { final NumberFormat nf = NumberFormat.getPercentInstance(); nf.setMaximumFractionDigits(2); return nf.format(value); } }