move java8 code (#2535)

* fix spring config

* fix spring config

* fix spring config

* minor fix

* fix spring-boot module

* fix pom

* upgrade jackson

* minor fix

* java concurrency

* cleanup

* fix conflict

* java 8

* clean up

* add core-java-8 to main pom
This commit is contained in:
Doha2012
2017-08-31 09:43:28 +02:00
committed by Grzegorz Piwowarek
parent 2aeef70d39
commit 9c03b45c23
94 changed files with 358 additions and 34 deletions
@@ -1,12 +0,0 @@
package com.baeldung;
import java.util.function.Consumer;
import java.util.function.Function;
public interface Adder {
String addWithFunction(Function<String, String> f);
void addWithConsumer(Consumer<Integer> f);
}
@@ -1,17 +0,0 @@
package com.baeldung;
import java.util.function.Consumer;
import java.util.function.Function;
public class AdderImpl implements Adder {
@Override
public String addWithFunction(final Function<String, String> f) {
return f.apply("Something ");
}
@Override
public void addWithConsumer(final Consumer<Integer> f) {
}
}
@@ -1,12 +0,0 @@
package com.baeldung;
@FunctionalInterface
public interface Bar {
String method(String string);
default String defaultMethod() {
return "String from Bar";
}
}
@@ -1,11 +0,0 @@
package com.baeldung;
@FunctionalInterface
public interface Baz {
String method(String string);
default String defaultMethod() {
return "String from Baz";
}
}
@@ -1,10 +0,0 @@
package com.baeldung;
@FunctionalInterface
public interface Foo {
String method(String string);
default void defaultMethod() {
}
}
@@ -1,11 +0,0 @@
package com.baeldung;
@FunctionalInterface
public interface FooExtended extends Baz, Bar {
@Override
default String defaultMethod() {
return Bar.super.defaultMethod();
}
}
@@ -1,37 +0,0 @@
package com.baeldung;
import java.util.function.Function;
public class UseFoo {
private String value = "Enclosing scope value";
public String add(final String string, final Foo foo) {
return foo.method(string);
}
public String addWithStandardFI(final String string, final Function<String, String> fn) {
return fn.apply(string);
}
public String scopeExperiment() {
final Foo fooIC = new Foo() {
String value = "Inner class value";
@Override
public String method(final String string) {
return value;
}
};
final String resultIC = fooIC.method("");
final Foo fooLambda = parameter -> {
final String value = "Lambda value";
return this.value;
};
final String resultLambda = fooLambda.method("");
return "Results: resultIC = " + resultIC + ", resultLambda = " + resultLambda;
}
}
@@ -1,2 +0,0 @@
### Relevant Articles:
- [Introduction to the Java 8 Date/Time API](http://www.baeldung.com/java-8-date-time-intro)
@@ -1,16 +0,0 @@
package com.baeldung.datetime;
import java.time.Duration;
import java.time.LocalTime;
import java.time.Period;
public class UseDuration {
public LocalTime modifyDates(LocalTime localTime, Duration duration) {
return localTime.plus(duration);
}
public Duration getDifferenceBetweenDates(LocalTime localTime1, LocalTime localTime2) {
return Duration.between(localTime1, localTime2);
}
}
@@ -1,46 +0,0 @@
package com.baeldung.datetime;
import java.time.DayOfWeek;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;
import java.time.temporal.TemporalAdjusters;
class UseLocalDate {
LocalDate getLocalDateUsingFactoryOfMethod(int year, int month, int dayOfMonth) {
return LocalDate.of(year, month, dayOfMonth);
}
LocalDate getLocalDateUsingParseMethod(String representation) {
return LocalDate.parse(representation);
}
LocalDate getLocalDateFromClock() {
LocalDate localDate = LocalDate.now();
return localDate;
}
LocalDate getNextDay(LocalDate localDate) {
return localDate.plusDays(1);
}
LocalDate getPreviousDay(LocalDate localDate) {
return localDate.minus(1, ChronoUnit.DAYS);
}
DayOfWeek getDayOfWeek(LocalDate localDate) {
DayOfWeek day = localDate.getDayOfWeek();
return day;
}
LocalDate getFirstDayOfMonth() {
LocalDate firstDayOfMonth = LocalDate.now().with(TemporalAdjusters.firstDayOfMonth());
return firstDayOfMonth;
}
LocalDateTime getStartOfDay(LocalDate localDate) {
LocalDateTime startofDay = localDate.atStartOfDay();
return startofDay;
}
}
@@ -1,31 +0,0 @@
package com.baeldung.datetime;
import java.time.LocalTime;
import java.time.temporal.ChronoUnit;
public class UseLocalTime {
LocalTime getLocalTimeUsingFactoryOfMethod(int hour, int min, int seconds) {
return LocalTime.of(hour, min, seconds);
}
LocalTime getLocalTimeUsingParseMethod(String timeRepresentation) {
return LocalTime.parse(timeRepresentation);
}
private LocalTime getLocalTimeFromClock() {
return LocalTime.now();
}
LocalTime addAnHour(LocalTime localTime) {
return localTime.plus(1, ChronoUnit.HOURS);
}
int getHourFromLocalTime(LocalTime localTime) {
return localTime.getHour();
}
LocalTime getLocalTimeWithMinuteSetToValue(LocalTime localTime, int minute) {
return localTime.withMinute(minute);
}
}
@@ -1,15 +0,0 @@
package com.baeldung.datetime;
import java.time.LocalDate;
import java.time.Period;
class UsePeriod {
LocalDate modifyDates(LocalDate localDate, Period period) {
return localDate.plus(period);
}
Period getDifferenceBetweenDates(LocalDate localDate1, LocalDate localDate2) {
return Period.between(localDate1, localDate2);
}
}
@@ -1,17 +0,0 @@
package com.baeldung.datetime;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Calendar;
import java.util.Date;
public class UseToInstant {
public LocalDateTime convertDateToLocalDate(Date date) {
return LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
}
public LocalDateTime convertDateToLocalDate(Calendar calendar) {
return LocalDateTime.ofInstant(calendar.toInstant(), ZoneId.systemDefault());
}
}
@@ -1,12 +0,0 @@
package com.baeldung.datetime;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
class UseZonedDateTime {
ZonedDateTime getZonedDateTime(LocalDateTime localDateTime, ZoneId zoneId) {
return ZonedDateTime.of(localDateTime, zoneId);
}
}
@@ -1,85 +0,0 @@
package com.baeldung.doublecolon;
public class Computer {
private Integer age;
private String color;
private Integer healty;
Computer(final int age, final String color) {
this.age = age;
this.color = color;
}
Computer(final Integer age, final String color, final Integer healty) {
this.age = age;
this.color = color;
this.healty = healty;
}
public Computer() {
}
public Integer getAge() {
return age;
}
public void setAge(final Integer age) {
this.age = age;
}
String getColor() {
return color;
}
public void setColor(final String color) {
this.color = color;
}
Integer getHealty() {
return healty;
}
void setHealty(final Integer healty) {
this.healty = healty;
}
public void turnOnPc() {
System.out.println("Computer turned on");
}
public void turnOffPc() {
System.out.println("Computer turned off");
}
public Double calculateValue(Double initialValue) {
return initialValue / 1.50;
}
@Override
public String toString() {
return "Computer{" + "age=" + age + ", color='" + color + '\'' + ", healty=" + healty + '}';
}
@Override
public boolean equals(final Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
final Computer computer = (Computer) o;
return (age != null ? age.equals(computer.age) : computer.age == null) && (color != null ? color.equals(computer.color) : computer.color == null);
}
@Override
public int hashCode() {
int result = age != null ? age.hashCode() : 0;
result = 31 * result + (color != null ? color.hashCode() : 0);
return result;
}
}
@@ -1,27 +0,0 @@
package com.baeldung.doublecolon;
import com.baeldung.doublecolon.function.ComputerPredicate;
import java.util.ArrayList;
import java.util.List;
public class ComputerUtils {
static final ComputerPredicate after2010Predicate = (c) -> (c.getAge() > 2010);
static final ComputerPredicate blackPredicate = (c) -> "black".equals(c.getColor());
public static List<Computer> filter(final List<Computer> inventory, final ComputerPredicate p) {
final List<Computer> result = new ArrayList<>();
inventory.stream().filter(p::filter).forEach(result::add);
return result;
}
static void repair(final Computer computer) {
if (computer.getHealty() < 50) {
computer.setHealty(100);
}
}
}
@@ -1,39 +0,0 @@
package com.baeldung.doublecolon;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.function.Function;
public class MacbookPro extends Computer {
private static final Logger LOG = LoggerFactory.getLogger(MacbookPro.class);
public MacbookPro(int age, String color) {
super(age, color);
}
MacbookPro(Integer age, String color, Integer healty) {
super(age, color, healty);
}
@Override
public void turnOnPc() {
LOG.debug("MacbookPro turned on");
}
@Override
public void turnOffPc() {
LOG.debug("MacbookPro turned off");
}
@Override
public Double calculateValue(Double initialValue) {
Function<Double, Double> function = super::calculateValue;
final Double pcValue = function.apply(initialValue);
LOG.debug("First value is:" + pcValue);
return pcValue + (initialValue / 10);
}
}
@@ -1,10 +0,0 @@
package com.baeldung.doublecolon.function;
import com.baeldung.doublecolon.Computer;
@FunctionalInterface
public interface ComputerPredicate {
boolean filter(Computer c);
}
@@ -1,15 +0,0 @@
package com.baeldung.doublecolon.function;
import java.util.Objects;
import java.util.function.Function;
@FunctionalInterface
public interface TriFunction<A, B, C, R> {
R apply(A a, B b, C c);
default <V> TriFunction<A, B, C, V> andThen(final Function<? super R, ? extends V> after) {
Objects.requireNonNull(after);
return (final A a, final B b, final C c) -> after.apply(apply(a, b, c));
}
}
@@ -1,57 +0,0 @@
package com.baeldung.java8.lambda.exceptions;
import java.util.function.Consumer;
public class LambdaExceptionWrappers {
public static Consumer<Integer> lambdaWrapper(Consumer<Integer> consumer) {
return i -> {
try {
consumer.accept(i);
} catch (ArithmeticException e) {
System.err.println("Arithmetic Exception occured : " + e.getMessage());
}
};
}
static <T, E extends Exception> Consumer<T> consumerWrapper(Consumer<T> consumer, Class<E> clazz) {
return i -> {
try {
consumer.accept(i);
} catch (Exception ex) {
try {
E exCast = clazz.cast(ex);
System.err.println("Exception occured : " + exCast.getMessage());
} catch (ClassCastException ccEx) {
throw ex;
}
}
};
}
public static <T> Consumer<T> throwingConsumerWrapper(ThrowingConsumer<T, Exception> throwingConsumer) {
return i -> {
try {
throwingConsumer.accept(i);
} catch (Exception ex) {
throw new RuntimeException(ex);
}
};
}
public static <T, E extends Exception> Consumer<T> handlingConsumerWrapper(ThrowingConsumer<T, E> throwingConsumer, Class<E> exceptionClass) {
return i -> {
try {
throwingConsumer.accept(i);
} catch (Exception ex) {
try {
E exCast = exceptionClass.cast(ex);
System.err.println("Exception occured : " + exCast.getMessage());
} catch (ClassCastException ccEx) {
throw new RuntimeException(ex);
}
}
};
}
}
@@ -1,8 +0,0 @@
package com.baeldung.java8.lambda.exceptions;
@FunctionalInterface
public interface ThrowingConsumer<T, E extends Exception> {
void accept(T t) throws E;
}
@@ -1,14 +0,0 @@
package com.baeldung.java_8_features;
public class Address {
private String street;
public String getStreet() {
return street;
}
public void setStreet(String street) {
this.street = street;
}
}
@@ -1,4 +0,0 @@
package com.baeldung.java_8_features;
public class CustomException extends RuntimeException {
}
@@ -1,13 +0,0 @@
package com.baeldung.java_8_features;
import java.util.Arrays;
import java.util.List;
public class Detail {
private static final List<String> PARTS = Arrays.asList("turbine", "pump");
public List<String> getParts() {
return PARTS;
}
}
@@ -1,16 +0,0 @@
package com.baeldung.java_8_features;
import java.util.Optional;
public class OptionalAddress {
private String street;
public Optional<String> getStreet() {
return Optional.ofNullable(street);
}
public void setStreet(String street) {
this.street = street;
}
}
@@ -1,16 +0,0 @@
package com.baeldung.java_8_features;
import java.util.Optional;
public class OptionalUser {
private OptionalAddress address;
public Optional<OptionalAddress> getAddress() {
return Optional.of(address);
}
public void setAddress(OptionalAddress address) {
this.address = address;
}
}
@@ -1,27 +0,0 @@
package com.baeldung.java_8_features;
public class Person {
private String name;
private Integer age;
public Person(String name, int age) {
this.name = name;
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}
@@ -1,40 +0,0 @@
package com.baeldung.java_8_features;
import java.util.Optional;
public class User {
private String name;
private Address address;
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
public User() {
}
public User(String name) {
this.name = name;
}
public static boolean isRealUser(User user) {
return true;
}
public String getOrThrow() {
String value = null;
Optional<String> valueOpt = Optional.ofNullable(value);
String result = valueOpt.orElseThrow(CustomException::new).toUpperCase();
return result;
}
public boolean isLegalName(String name) {
return name.length() > 3 && name.length() < 16;
}
}
@@ -1,18 +0,0 @@
package com.baeldung.java_8_features;
public interface Vehicle {
void moveTo(long altitude, long longitude);
static String producer() {
return "N&F Vehicles";
}
default long[] startPosition() {
return new long[] { 23, 15 };
}
default String getOverview() {
return "ATV made by " + producer();
}
}
@@ -1,9 +0,0 @@
package com.baeldung.java_8_features;
public class VehicleImpl implements Vehicle {
@Override
public void moveTo(long altitude, long longitude) {
// do nothing
}
}
@@ -1,36 +0,0 @@
package com.baeldung.java_8_features.groupingby;
public class BlogPost {
private String title;
private String author;
private BlogPostType type;
private int likes;
public BlogPost(String title, String author, BlogPostType type, int likes) {
this.title = title;
this.author = author;
this.type = type;
this.likes = likes;
}
public String getTitle() {
return title;
}
public String getAuthor() {
return author;
}
public BlogPostType getType() {
return type;
}
public int getLikes() {
return likes;
}
@Override
public String toString() {
return "BlogPost{" + "title='" + title + '\'' + ", type=" + type + ", likes=" + likes + '}';
}
}
@@ -1,5 +0,0 @@
package com.baeldung.java_8_features.groupingby;
public enum BlogPostType {
NEWS, REVIEW, GUIDE
}
@@ -1,13 +0,0 @@
package com.baeldung.optional;
public class Modem {
private Double price;
public Modem(Double price) {
this.price = price;
}
public Double getPrice() {
return price;
}
}
@@ -1,39 +0,0 @@
package com.baeldung.optional;
import java.util.Optional;
public class Person {
private String name;
private int age;
private String password;
public Person(String name, int age) {
this.name = name;
this.age = age;
}
public Optional<String> getName() {
return Optional.ofNullable(name);
}
public void setName(String name) {
this.name = name;
}
public Optional<Integer> getAge() {
return Optional.ofNullable(age);
}
public void setAge(int age) {
this.age = age;
}
public void setPassword(String password) {
this.password = password;
}
public Optional<String> getPassword() {
return Optional.ofNullable(password);
}
}
@@ -1,11 +0,0 @@
package com.baeldung.strategy;
import java.math.BigDecimal;
public class ChristmasDiscounter implements Discounter {
@Override
public BigDecimal apply(BigDecimal amount) {
return amount.multiply(BigDecimal.valueOf(0.9));
}
}
@@ -1,23 +0,0 @@
package com.baeldung.strategy;
import java.math.BigDecimal;
import java.util.function.UnaryOperator;
public interface Discounter extends UnaryOperator<BigDecimal> {
default Discounter combine(Discounter after) {
return value -> after.apply(this.apply(value));
}
static Discounter christmas() {
return (amount) -> amount.multiply(BigDecimal.valueOf(0.9));
}
static Discounter newYear() {
return (amount) -> amount.multiply(BigDecimal.valueOf(0.8));
}
static Discounter easter() {
return (amount) -> amount.multiply(BigDecimal.valueOf(0.5));
}
}
@@ -1,11 +0,0 @@
package com.baeldung.strategy;
import java.math.BigDecimal;
public class EasterDiscounter implements Discounter {
@Override
public BigDecimal apply(BigDecimal amount) {
return amount.multiply(BigDecimal.valueOf(0.5));
}
}
@@ -1,32 +0,0 @@
package com.baeldung.stream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.stream.Stream;
public class InfiniteStreams {
private static final Logger LOG = LoggerFactory.getLogger(InfiniteStreams.class);
public static void main(String[] args) {
doWhileOldWay();
doWhileStreamWay();
}
private static void doWhileOldWay() {
int i = 0;
while (i < 10) {
LOG.debug("{}", i);
i++;
}
}
private static void doWhileStreamWay() {
Stream<Integer> integers = Stream.iterate(0, i -> i + 1);
integers.limit(10).forEach(System.out::println);
}
}
@@ -1,24 +0,0 @@
package com.baeldung.stream;
import java.util.List;
import java.util.stream.Stream;
public class StreamApi {
public static String getLastElementUsingReduce(List<String> valueList) {
Stream<String> stream = valueList.stream();
return stream.reduce((first, second) -> second).orElse(null);
}
public static Integer getInfiniteStreamLastElementUsingReduce() {
Stream<Integer> stream = Stream.iterate(0, i -> i + 1);
return stream.limit(20).reduce((first, second) -> second).orElse(null);
}
public static String getLastElementUsingSkip(List<String> valueList) {
long count = valueList.stream().count();
Stream<String> stream = valueList.stream();
return stream.skip(count - 1).findFirst().orElse(null);
}
}
@@ -1,50 +0,0 @@
package com.baeldung.streamApi;
import java.util.List;
import java.util.Optional;
import java.util.stream.IntStream;
import java.util.stream.Stream;
/**
* Created by Alex Vengr
*/
public class Product {
private int price;
private String name;
private boolean utilize;
public Product(int price, String name) {
this(price);
this.name = name;
}
public Product(int price) {
this.price = price;
}
public Product() {
}
public int getPrice() {
return price;
}
public void setPrice(int price) {
this.price = price;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public static Stream<String> streamOf(List<String> list) {
return (list == null || list.isEmpty()) ? Stream.empty() : list.stream();
}
}
@@ -1,36 +0,0 @@
package com.baeldung.string;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class JoinerSplitter {
public static String join ( String[] arrayOfString ) {
return Arrays.asList(arrayOfString)
.stream()
.map(x -> x)
.collect(Collectors.joining(","));
}
public static String joinWithPrefixPostFix ( String[] arrayOfString ) {
return Arrays.asList(arrayOfString)
.stream()
.map(x -> x)
.collect(Collectors.joining(",","[","]"));
}
public static List<String> split ( String str ) {
return Stream.of(str.split(","))
.map (elem -> new String(elem))
.collect(Collectors.toList());
}
public static List<Character> splitToListOfChar ( String str ) {
return str.chars()
.mapToObj(item -> (char) item)
.collect(Collectors.toList());
}
}
@@ -1,22 +0,0 @@
package com.baeldung.temporaladjuster;
import java.time.DayOfWeek;
import java.time.temporal.ChronoField;
import java.time.temporal.ChronoUnit;
import java.time.temporal.Temporal;
import java.time.temporal.TemporalAdjuster;
public class CustomTemporalAdjuster implements TemporalAdjuster {
@Override
public Temporal adjustInto(Temporal temporal) {
switch (DayOfWeek.of(temporal.get(ChronoField.DAY_OF_WEEK))) {
case FRIDAY:
return temporal.plus(3, ChronoUnit.DAYS);
case SATURDAY:
return temporal.plus(2, ChronoUnit.DAYS);
default:
return temporal.plus(1, ChronoUnit.DAYS);
}
}
}