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added exercise5
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‎solutions/exercise5/Collections/.gradle/1.7/taskArtifacts/cache.properties‎

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#Tue Oct 22 15:53:53 CST 2013

‎solutions/exercise5/Collections/.gradle/1.7/taskArtifacts/cache.properties.lock‎

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‎solutions/exercise5/Collections/.gradle/1.7/taskArtifacts/fileHashes.bin‎

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‎solutions/exercise5/Collections/build.gradle‎

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apply plugin: 'java'
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apply plugin:'application'
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mainClassName = "Main"
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repositories {
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mavenCentral()
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}
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dependencies {
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compile group: 'com.google.guava', name: 'guava', version: '15.0'
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}

‎solutions/exercise5/Collections/src/main/java/Main.java‎

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import java.util.*;
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import com.google.common.collect.*;
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import static java.lang.System.*;
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public class Main {
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public static void main(String[] args) {
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// List Demo
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List<Integer> numbers = Arrays.asList(1, 2, 3);
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List<Integer> collector =
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ImmutableList.<Integer>builder()
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.add(10)
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.addAll(numbers)
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.build();
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out.println(collector.size()); // 4
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// Set Demo
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Set<String> admins = ImmutableSet.of("Justin", "caterpillar");
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Set<String> users = ImmutableSet.of("momor", "hamini", "Justin");
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out.println(admins.contains("Justin")); // 是否在站長群？true
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out.println(Sets.intersection(admins, users)); // 同時是站長群也是使用者群的？ [Justin]
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out.println(Sets.union(admins, users)); // 是站長群或是使用者群的？ [Justin, caterpillar, momor, hamini]
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out.println(Sets.difference(admins, users)); // 站長群但不使用者群的？ [caterpillar]
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out.println(Sets.symmetricDifference(admins, users)); // xor [caterpillar, momor, hamini]
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out.println(admins.containsAll(users)); // ∈，false
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out.println(users.containsAll(admins)); // false*/
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// Map Demo
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Map<String, Integer> passwords = ImmutableMap.of("Justin", 123456, "caterpillar", 93933);
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out.println(passwords.get("Justin")); // 123456
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out.println(passwords.entrySet()); // [Justin=123456, Hamimi=970221]
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out.println(passwords.keySet()); // [Justin, Hamimi]
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out.println(passwords.values()); // [123456, 970221]
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}
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}

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