Java tutorial
/* * WiFiAnalyzer * Copyright (C) 2017 VREM Software Development <VREMSoftwareDevelopment@gmail.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/> */ package com.vrem.wifianalyzer.wifi.band; import android.support.annotation.NonNull; import org.apache.commons.lang3.StringUtils; import java.util.Arrays; import java.util.HashMap; import java.util.Map; import java.util.SortedSet; import java.util.TreeSet; class WiFiChannelCountryGHZ5 { private final SortedSet<Integer> channels; private final Map<String, SortedSet<Integer>> channelsToExclude; WiFiChannelCountryGHZ5() { SortedSet<Integer> channelsSet1 = new TreeSet<>(Arrays.asList(36, 40, 44, 48, 52, 56, 60, 64)); SortedSet<Integer> channelsSet2 = new TreeSet<>( Arrays.asList(100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144)); SortedSet<Integer> channelsSet3 = new TreeSet<>(Arrays.asList(149, 153, 157, 161, 165)); SortedSet<Integer> channelsToExcludeCanada = new TreeSet<>(Arrays.asList(120, 124, 128)); SortedSet<Integer> channelsToExcludeIsrael = new TreeSet<>(channelsSet2); channelsToExcludeIsrael.addAll(channelsSet3); channelsToExclude = new HashMap<>(); channelsToExclude.put("AU", channelsToExcludeCanada); // Australia channelsToExclude.put("CA", channelsToExcludeCanada); // Canada channelsToExclude.put("CN", channelsSet2); // China channelsToExclude.put("IL", channelsToExcludeIsrael); // Israel channelsToExclude.put("JP", channelsSet3); // Japan channelsToExclude.put("KR", channelsSet2); // South Korea channelsToExclude.put("TR", channelsSet3); // Turkey channelsToExclude.put("ZA", channelsSet3); // South Africa channels = new TreeSet<>(channelsSet1); channels.addAll(channelsSet2); channels.addAll(channelsSet3); } SortedSet<Integer> findChannels(@NonNull String countryCode) { SortedSet<Integer> results = new TreeSet<>(channels); SortedSet<Integer> exclude = channelsToExclude.get(StringUtils.capitalize(countryCode)); if (exclude != null) { results.removeAll(exclude); } return results; } }