Java tutorial
//package com.java2s; /****************************************************************************** * Copyright 2015 by OLTPBenchmark Project * * * * 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.Collection; public class Main { public static int[] toIntArray(Collection<Integer> items) { int ret[] = new int[items.size()]; int idx = 0; for (Integer i : items) { assert (i != null); ret[idx++] = i.intValue(); } // FOR return (ret); } }