Java tutorial
//package com.java2s; /* * Copyright (C) 2014 Pivotal Software, 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.ArrayList; import java.util.Collection; public class Main { public static <T> Collection<T> filter(final Collection<?> objects, final Class<T> filterType) { final Collection<T> filtered = new ArrayList<T>(); for (final Object object : objects) { if (filterType.isInstance(object)) { filtered.add(filterType.cast(object)); } } return filtered; } }