Here you can find the source of createSimpleBitSet(Set
public static final BitSet createSimpleBitSet(Set<Integer> setBits)
//package com.java2s; /*//from w ww . j av a2 s.c o m * Copyright 2011 - 2015 Metamarkets Group Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.util.BitSet; import java.util.Set; public class Main { public static final BitSet createSimpleBitSet(Set<Integer> setBits) { BitSet retval = new BitSet(); for (int i : setBits) { retval.set(i); } return retval; } }