Examples with Person com.huangjunlin.learning.model.Person used on opensource projects

Example 1 with Person

use of com.huangjunlin.learning.model.Person in project java-code-show by CodeShowZz.

the class StreamTest method collectIntoMapTest.

@Test
public void collectIntoMapTest() {
    List<Person> personList = new ArrayList<>();
    Person tom = new Person(1, "Tom");
    Person jack = new Person(2, "Jack");
    Person mary = new Person(3, "Mary");
    personList.add(tom);
    personList.add(jack);
    personList.add(mary);
    // 将List中每个Person对象的id和name形成Map
    Map<Integer, String> personMap = personList.stream().collect(Collectors.toMap(Person::getId, Person::getName));
    log.info("personMap:{}", personMap);
    Map<Integer, Person> idToPerson = personList.stream().collect(Collectors.toMap(Person::getId, Function.identity()));
    log.info("idToPerson:{}", idToPerson);
    // 如果流中有重复的元素,需要过滤掉,否则会报错
    Stream<Locale> locales = Stream.of(Locale.getAvailableLocales());
    Map<String, String> languageNames = locales.collect(Collectors.toMap(Locale::getDisplayLanguage, Locale::getDisplayLanguage, (String existingValue, String newValue) -> {
        return existingValue;
    }));
    log.info("languageNames:{}", languageNames);
}

Example 2 with Person

use of com.huangjunlin.learning.model.Person in project code-sample by SprintBean.

the class defaultInterface method main.

public static void main(String[] args) throws ClassNotFoundException, NoSuchFieldException, IllegalAccessException, InstantiationException, NoSuchMethodException, InvocationTargetException, CloneNotSupportedException {
    Person tom = new Person();
    tom.setName("tom");
    Person jack = new Person();
    jack.setName("jack");
    Person mary = new Person();
    Person[] persons = new Person[3];
    persons[0] = tom;
    persons[1] = jack;
    persons[2] = mary;
    Arrays.sort(persons, Comparator.comparing(Person::getName, Comparator.nullsFirst(Comparator.naturalOrder())));
    for (Person p : persons) {
        log.info("" + p);
    }
    new Thread(() -> {
        log.info("hello");
    }).start();
}

Example 3 with Person

use of com.huangjunlin.learning.model.Person in project code-sample by SprintBean.

the class StreamTest method collectIntoMapTest.

@Test
public void collectIntoMapTest() {
    List<Person> personList = new ArrayList<>();
    Person tom = new Person(1, "Tom");
    Person jack = new Person(2, "Jack");
    Person mary = new Person(3, "Mary");
    personList.add(tom);
    personList.add(jack);
    personList.add(mary);
    // 将List中每个Person对象的id和name形成Map
    Map<Integer, String> personMap = personList.stream().collect(Collectors.toMap(Person::getId, Person::getName));
    log.info("personMap:{}", personMap);
    Map<Integer, Person> idToPerson = personList.stream().collect(Collectors.toMap(Person::getId, Function.identity()));
    log.info("idToPerson:{}", idToPerson);
    // 如果流中有重复的元素,需要过滤掉,否则会报错
    Stream<Locale> locales = Stream.of(Locale.getAvailableLocales());
    Map<String, String> languageNames = locales.collect(Collectors.toMap(Locale::getDisplayLanguage, Locale::getDisplayLanguage, (String existingValue, String newValue) -> {
        return existingValue;
    }));
    log.info("languageNames:{}", languageNames);
}

Example 4 with Person

use of com.huangjunlin.learning.model.Person in project code-sample by SprintBean.

the class StreamTest method collectResultTest.

@Test
public void collectResultTest() {
    String[] names = { "Tom", "Jack", "Mary", "Adams", "HuangJunlin" };
    // 遍历流中的每一个元素
    Stream.of(names).forEach((x) -> {
        log.info(x);
    });
    // 流转换成数组
    String[] result = Stream.of(names).toArray(String[]::new);
    // 流转换成List
    List<String> result2 = Stream.of(names).collect(Collectors.toList());
    // 流转换成Set
    Set<String> result3 = Stream.of(names).collect(Collectors.toSet());
    // 流转换成TreeSet
    TreeSet<String> result4 = Stream.of(names).collect(Collectors.toCollection(TreeSet::new));
    // 将流中的元素元素直接连接起来
    String result5 = Stream.of(names).collect(Collectors.joining());
    // 将流中的元素连接起来 中间隔着特定的符号
    String result6 = Stream.of(names).collect(Collectors.joining(", "));
    // 对象要先转字符串才能连接起来
    List<Person> personList = new ArrayList<>();
    personList.add(new Person(1, "Tom"));
    personList.add(new Person(2, "Jack"));
    String result7 = personList.stream().map(Object::toString).collect(Collectors.joining(", "));
    // 统计流中的最大值 平均值 最小值等
    IntSummaryStatistics summary = Stream.of(names).collect(Collectors.summarizingInt(String::length));
    double averageWordLength = summary.getAverage();
    double maxWordLength = summary.getMax();
    log.info("averageWordLength:{}", averageWordLength);
    log.info("maxWordLength:{}", maxWordLength);
}

Example 5 with Person

use of com.huangjunlin.learning.model.Person in project java-code-show by CodeShowZz.

the class defaultInterface method main.

public static void main(String[] args) throws ClassNotFoundException, NoSuchFieldException, IllegalAccessException, InstantiationException, NoSuchMethodException, InvocationTargetException, CloneNotSupportedException {
    Person tom = new Person();
    tom.setName("tom");
    Person jack = new Person();
    jack.setName("jack");
    Person mary = new Person();
    Person[] persons = new Person[3];
    persons[0] = tom;
    persons[1] = jack;
    persons[2] = mary;
    Arrays.sort(persons, Comparator.comparing(Person::getName, Comparator.nullsFirst(Comparator.naturalOrder())));
    for (Person p : persons) {
        log.info("" + p);
    }
    new Thread(() -> {
        log.info("hello");
    }).start();
}