Java tutorial
//package com.java2s; /* * jPOS Project [http://jpos.org] * Copyright (C) 2000-2012 Alejandro P. Revilla * * 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.util.BitSet; public class Main { public static int bitSet2Int(BitSet bs) { int total = 0; int b = bs.length() - 1; if (b > 0) { int value = (int) Math.pow(2, b); for (int i = 0; i <= b; i++) { if (bs.get(i)) total += value; value = value >> 1; } } return total; } }