Here you can find the source of toRadixPrefix(int radix)
static final String toRadixPrefix(int radix)
//package com.java2s; /*/*from ww w. j a va 2s . c om*/ * Copyright (C) 2016 Chan Chung Kwong <1m02math@126.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/>. */ public class Main { static final String toRadixPrefix(int radix) { switch (radix) { case 2: return "#b"; case 8: return "#o"; case 10: return "#d"; case 16: return "#x"; default: throw new RuntimeException(); } } }