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Merge branch 'master' of https://github.com/Maiklins/tutorials into Java-1524-split-move-spring-boot-persistence

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 Conflicts:
	persistence-modules/spring-boot-persistence-2/README.md
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mikr
2020-05-16 16:47:19 +02:00
parent c2637f1509 6a7e086c4d
commit 8c1e57cc58
113 changed files with 2887 additions and 100 deletions
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atomikos/README.md
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## Atomikos
This module contains articles about Atomikos
### Relevant Articles:
- [Guide Transactions Using Atomikos]()
- [A Guide to Atomikos](https://www.baeldung.com/java-atomikos)
aws-app-sync/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.baeldung</groupId>
<artifactId>aws-app-sync</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>aws-app-sync</name>
<description>Spring Boot using AWS App Sync</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
aws-app-sync/src/main/java/com/baeldung/awsappsync/AppSyncClientHelper.java
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package com.baeldung.awsappsync;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.web.reactive.function.BodyInserters;
import org.springframework.web.reactive.function.client.WebClient;
import java.nio.charset.StandardCharsets;
import java.util.Map;
public class AppSyncClientHelper {
static String apiUrl = "https://m4i3b6icrrb7livfbypfspiifi.appsync-api.us-east-2.amazonaws.com";
static String apiKey = "da2-bm4rpatkkrc5jfyhvvq7itjeke";
static String API_KEY_HEADER = "x-api-key";
public static WebClient.ResponseSpec getResponseBodySpec(Map<String, Object> requestBody) {
return WebClient
.builder()
.baseUrl(apiUrl)
.defaultHeader(API_KEY_HEADER, apiKey)
.defaultHeader("Content-Type", "application/json")
.build()
.method(HttpMethod.POST)
.uri("/graphql")
.body(BodyInserters.fromValue(requestBody))
.accept(MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML)
.acceptCharset(StandardCharsets.UTF_8)
.retrieve();
}
}
aws-app-sync/src/main/java/com/baeldung/awsappsync/AwsAppSyncApplication.java
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package com.baeldung.awsappsync;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class AwsAppSyncApplication {
public static void main(String[] args) {
SpringApplication.run(AwsAppSyncApplication.class, args);
}
}
aws-app-sync/src/test/java/com/baeldung/awsappsync/AwsAppSyncApplicationTests.java
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package com.baeldung.awsappsync;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.web.reactive.function.client.WebClient;
import java.util.HashMap;
import java.util.Map;
import static org.junit.jupiter.api.Assertions.*;
@SpringBootTest
class AwsAppSyncApplicationTests {
@Test
void givenGraphQuery_whenListEvents_thenReturnAllEvents() {
Map<String, Object> requestBody = new HashMap<>();
requestBody.put("query", "query ListEvents {"
+ " listEvents {"
+ " items {"
+ " id"
+ " name"
+ " where"
+ " when"
+ " description"
+ " }"
+ " }"
+ "}");
requestBody.put("variables", "");
requestBody.put("operationName", "ListEvents");
String bodyString = AppSyncClientHelper.getResponseBodySpec(requestBody)
.bodyToMono(String.class).block();
assertNotNull(bodyString);
assertTrue(bodyString.contains("My First Event"));
assertTrue(bodyString.contains("where"));
assertTrue(bodyString.contains("when"));
}
@Test
void givenGraphAdd_whenMutation_thenReturnIdNameDesc() {
String queryString = "mutation add {"
+ " createEvent("
+ " name:\"My added GraphQL event\""
+ " where:\"Day 2\""
+ " when:\"Saturday night\""
+ " description:\"Studying GraphQL\""
+ " ){"
+ " id"
+ " name"
+ " description"
+ " }"
+ "}";
Map<String, Object> requestBody = new HashMap<>();
requestBody.put("query", queryString);
requestBody.put("variables", "");
requestBody.put("operationName", "add");
WebClient.ResponseSpec response = AppSyncClientHelper.getResponseBodySpec(requestBody);
String bodyString = response.bodyToMono(String.class).block();
assertNotNull(bodyString);
assertTrue(bodyString.contains("My added GraphQL event"));
assertFalse(bodyString.contains("where"));
assertFalse(bodyString.contains("when"));
}
}
bazel/bazelapp/README.md
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### Relevant Articles:
- [Building Java Applications with Bazel](https://www.baeldung.com/bazel-build-tool)
core-groovy/README.md
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- [Closures in Groovy](https://www.baeldung.com/groovy-closures)
- [Converting a String to a Date in Groovy](https://www.baeldung.com/groovy-string-to-date)
- [Guide to I/O in Groovy](https://www.baeldung.com/groovy-io)
- [[More -->]](/core-groovy-2)
- [Convert String to Integer in Groovy](https://www.baeldung.com/groovy-convert-string-to-integer)
- [[More -->]](/core-groovy-2)
core-java-modules/core-java-14/src/main/java/com/baeldung/java14/record/Person.java
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package com.baeldung.java14.record;
import java.util.Objects;
public record Person (String name, String address) {
public static String UNKWOWN_ADDRESS = "Unknown";
public static String UNNAMED = "Unnamed";
public Person {
Objects.requireNonNull(name);
Objects.requireNonNull(address);
}
public Person(String name) {
this(name, UNKWOWN_ADDRESS);
}
public static Person unnamed(String address) {
return new Person(UNNAMED, address);
}
}
core-java-modules/core-java-14/src/test/java/com/baeldung/java14/foreign/api/ForeignMemoryUnitTest.java
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package com.baeldung.java14.foreign.api;
import jdk.incubator.foreign.*;
import org.junit.Test;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;
import java.lang.invoke.VarHandle;
import java.nio.ByteOrder;
public class ForeignMemoryUnitTest {
@Test
public void whenAValueIsSet_thenAccessTheValue() {
long value = 10;
MemoryAddress memoryAddress =
MemorySegment.allocateNative(8).baseAddress();
VarHandle varHandle = MemoryHandles.varHandle(long.class,
ByteOrder.nativeOrder());
varHandle.set(memoryAddress, value);
assertThat(varHandle.get(memoryAddress), is(value));
}
@Test
public void whenMultipleValuesAreSet_thenAccessAll() {
VarHandle varHandle = MemoryHandles.varHandle(int.class,
ByteOrder.nativeOrder());
try(MemorySegment memorySegment =
MemorySegment.allocateNative(100)) {
MemoryAddress base = memorySegment.baseAddress();
for(int i=0; i<25; i++) {
varHandle.set(base.addOffset((i*4)), i);
}
for(int i=0; i<25; i++) {
assertThat(varHandle.get(base.addOffset((i*4))), is(i));
}
}
}
@Test
public void whenSetValuesWithMemoryLayout_thenTheyCanBeRetrieved() {
SequenceLayout sequenceLayout =
MemoryLayout.ofSequence(25,
MemoryLayout.ofValueBits(64, ByteOrder.nativeOrder()));
VarHandle varHandle =
sequenceLayout.varHandle(long.class,
MemoryLayout.PathElement.sequenceElement());
try(MemorySegment memorySegment =
MemorySegment.allocateNative(sequenceLayout)) {
MemoryAddress base = memorySegment.baseAddress();
for(long i=0; i<sequenceLayout.elementCount().getAsLong(); i++) {
varHandle.set(base, i, i);
}
for(long i=0; i<sequenceLayout.elementCount().getAsLong(); i++) {
assertThat(varHandle.get(base, i), is(i));
}
}
}
@Test
public void whenSlicingMemorySegment_thenTheyCanBeAccessedIndividually() {
MemoryAddress memoryAddress =
MemorySegment.allocateNative(12).baseAddress();
MemoryAddress memoryAddress1 =
memoryAddress.segment().asSlice(0,4).baseAddress();
MemoryAddress memoryAddress2 =
memoryAddress.segment().asSlice(4,4).baseAddress();
MemoryAddress memoryAddress3 =
memoryAddress.segment().asSlice(8,4).baseAddress();
VarHandle intHandle =
MemoryHandles.varHandle(int.class, ByteOrder.nativeOrder());
intHandle.set(memoryAddress1, Integer.MIN_VALUE);
intHandle.set(memoryAddress2, 0);
intHandle.set(memoryAddress3, Integer.MAX_VALUE);
assertThat(intHandle.get(memoryAddress1), is(Integer.MIN_VALUE));
assertThat(intHandle.get(memoryAddress2), is(0));
assertThat(intHandle.get(memoryAddress3), is(Integer.MAX_VALUE));
}
}
core-java-modules/core-java-14/src/test/java/com/baeldung/java14/record/PersonTest.java
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package com.baeldung.java14.record;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
public class PersonTest {
@Test
public void givenSameNameAndAddress_whenEquals_thenPersonsEqual() {
String name = "John Doe";
String address = "100 Linda Ln.";
Person person1 = new Person(name, address);
Person person2 = new Person(name, address);
assertTrue(person1.equals(person2));
}
@Test
public void givenDifferentObject_whenEquals_thenNotEqual() {
Person person = new Person("John Doe", "100 Linda Ln.");
assertFalse(person.equals(new Object()));
}
@Test
public void givenDifferentName_whenEquals_thenPersonsNotEqual() {
String address = "100 Linda Ln.";
Person person1 = new Person("Jane Doe", address);
Person person2 = new Person("John Doe", address);
assertFalse(person1.equals(person2));
}
@Test
public void givenDifferentAddress_whenEquals_thenPersonsNotEqual() {
String name = "John Doe";
Person person1 = new Person(name, "100 Linda Ln.");
Person person2 = new Person(name, "200 London Ave.");
assertFalse(person1.equals(person2));
}
@Test
public void givenSameNameAndAddress_whenHashCode_thenPersonsEqual() {
String name = "John Doe";
String address = "100 Linda Ln.";
Person person1 = new Person(name, address);
Person person2 = new Person(name, address);
assertEquals(person1.hashCode(), person2.hashCode());
}
@Test
public void givenDifferentObject_whenHashCode_thenNotEqual() {
Person person = new Person("John Doe", "100 Linda Ln.");
assertNotEquals(person.hashCode(), new Object().hashCode());
}
@Test
public void givenDifferentName_whenHashCode_thenPersonsNotEqual() {
String address = "100 Linda Ln.";
Person person1 = new Person("Jane Doe", address);
Person person2 = new Person("John Doe", address);
assertNotEquals(person1.hashCode(), person2.hashCode());
}
@Test
public void givenDifferentAddress_whenHashCode_thenPersonsNotEqual() {
String name = "John Doe";
Person person1 = new Person(name, "100 Linda Ln.");
Person person2 = new Person(name, "200 London Ave.");
assertNotEquals(person1.hashCode(), person2.hashCode());
}
@Test
public void givenValidNameAndAddress_whenGetNameAndAddress_thenExpectedValuesReturned() {
String name = "John Doe";
String address = "100 Linda Ln.";
Person person = new Person(name, address);
assertEquals(name, person.name());
assertEquals(address, person.address());
}
@Test
public void givenValidNameAndAddress_whenToString_thenCorrectStringReturned() {
String name = "John Doe";
String address = "100 Linda Ln.";
Person person = new Person(name, address);
assertEquals("Person[name=" + name + ", address=" + address + "]", person.toString());
}
@Test(expected = NullPointerException.class)
public void givenNullName_whenConstruct_thenErrorThrown() {
new Person(null, "100 Linda Ln.");
}
@Test(expected = NullPointerException.class)
public void givenNullAddress_whenConstruct_thenErrorThrown() {
new Person("John Doe", null);
}
@Test
public void givenUnknownAddress_whenConstructing_thenAddressPopulated() {
String name = "John Doe";
Person person = new Person(name);
assertEquals(name, person.name());
assertEquals(Person.UNKWOWN_ADDRESS, person.address());
}
@Test
public void givenUnnamed_whenConstructingThroughFactory_thenNamePopulated() {
String address = "100 Linda Ln.";
Person person = Person.unnamed(address);
assertEquals(Person.UNNAMED, person.name());
assertEquals(address, person.address());
}
}
core-java-modules/core-java-collections-maps-3/README.md
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### Relevant Articles:
- [Java TreeMap vs HashMap](https://www.baeldung.com/java-treemap-vs-hashmap)
- [Comparing Two HashMaps in Java](https://www.baeldung.com/java-compare-hashmaps)
- [The Map.computeIfAbsent() Method](https://www.baeldung.com/java-map-computeifabsent)
- More articles: [[<-- prev]](/core-java-modules/core-java-collections-maps-2)
core-java-modules/core-java-concurrency-2/README.md
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@@ -4,5 +4,5 @@
### Relevant Articles:
- [Using a Mutex Object in Java](https://www.baeldung.com/java-mutex)
- [Testing Multi-Threaded Code in Java] (https://www.baeldung.com/java-testing-multithreaded)
- [Testing Multi-Threaded Code in Java](https://www.baeldung.com/java-testing-multithreaded)
core-java-modules/core-java-concurrency-advanced-3/src/main/java/com/baeldung/lockfree/NonBlockingQueue.java
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package com.baeldung.lockfree;
import java.util.NoSuchElementException;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
public class NonBlockingQueue<T> {
private final AtomicReference<Node<T>> head, tail;
private final AtomicInteger size;
public NonBlockingQueue() {
head = new AtomicReference<>(null);
tail = new AtomicReference<>(null);
size = new AtomicInteger();
size.set(0);
}
public void add(T element) {
if (element == null) {
throw new NullPointerException();
}
Node<T> node = new Node<>(element);
Node<T> currentTail;
do {
currentTail = tail.get();
node.setPrevious(currentTail);
} while(!tail.compareAndSet(currentTail, node));
if(node.previous != null) {
node.previous.next = node;
}
head.compareAndSet(null, node); //if we are inserting the first element
size.incrementAndGet();
}
public T get() {
if(head.get() == null) {
throw new NoSuchElementException();
}
Node<T> currentHead;
Node<T> nextNode;
do {
currentHead = head.get();
nextNode = currentHead.getNext();
} while(!head.compareAndSet(currentHead, nextNode));
size.decrementAndGet();
return currentHead.getValue();
}
public int size() {
return this.size.get();
}
private class Node<T> {
private final T value;
private volatile Node<T> next;
private volatile Node<T> previous;
public Node(T value) {
this.value = value;
this.next = null;
}
public T getValue() {
return value;
}
public Node<T> getNext() {
return next;
}
public void setPrevious(Node<T> previous) {
this.previous = previous;
}
}
}
core-java-modules/core-java-date-operations-2/src/main/java/com/baeldung/weeknumber/WeekNumberUsingCalendar.java
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package com.baeldung.weeknumber;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
public class WeekNumberUsingCalendar {
public int getWeekNumberFrom(String day, String dateFormat, Locale locale) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
Calendar calendar = Calendar.getInstance(locale);
Date date = sdf.parse(day);
calendar.setTime(date);
return calendar.get(Calendar.WEEK_OF_YEAR);
}
public int getWeekNumberFrom(int year, int month, int day, Locale locale) {
Calendar calendar = Calendar.getInstance(locale);
calendar.set(year, month, day);
return calendar.get(Calendar.WEEK_OF_YEAR);
}
public int getWeekNumberFrom(int year, int month, int day, int firstDayOfWeek, int minimalDaysInFirstWeek, Locale locale) {
Calendar calendar = Calendar.getInstance(locale);
calendar.setFirstDayOfWeek(firstDayOfWeek);
calendar.setMinimalDaysInFirstWeek(minimalDaysInFirstWeek);
calendar.set(year, month, day);
return calendar.get(Calendar.WEEK_OF_YEAR);
}
public static void main(String[] args) {
WeekNumberUsingCalendar calendar = new WeekNumberUsingCalendar();
System.out.println(calendar.getWeekNumberFrom(2020, 2, 22, Locale.CANADA));
}
}
core-java-modules/core-java-date-operations-2/src/main/java/com/baeldung/weeknumber/WeekNumberUsingLocalDate.java
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package com.baeldung.weeknumber;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoField;
import java.time.temporal.WeekFields;
import java.util.Locale;
public class WeekNumberUsingLocalDate {
public Integer getWeekNumberUsingWeekFiedsFrom(String day, String dayFormat, Locale locale) {
LocalDate date = LocalDate.parse(day, DateTimeFormatter.ofPattern(dayFormat));
return date.get(WeekFields.of(locale)
.weekOfYear());
}
public Integer getWeekNumberUsinWeekFieldsFrom(int year, int month, int day, Locale locale) {
LocalDate date = LocalDate.of(year, month, day);
return date.get(WeekFields.of(locale)
.weekOfYear());
}
public Integer getWeekNumberUsingChronoFieldFrom(int year, int month, int day) {
LocalDate date = LocalDate.of(year, month, day);
return date.get(ChronoField.ALIGNED_WEEK_OF_YEAR);
}
}
core-java-modules/core-java-date-operations-2/src/test/java/com/baeldung/weeknumber/WeekNumberUsingCalendarUnitTest.java
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package com.baeldung.weeknumber;
import static org.junit.Assert.assertEquals;
import java.text.ParseException;
import java.util.Calendar;
import java.util.Locale;
import org.junit.Test;
public class WeekNumberUsingCalendarUnitTest {
@Test
public void givenDateInStringAndDateFormatUsingLocaleItaly_thenGettingWeekNumberUsingCalendarIsCorrectlyReturned() throws ParseException {
WeekNumberUsingCalendar calendar = new WeekNumberUsingCalendar();
assertEquals(12, calendar.getWeekNumberFrom("20200322", "yyyyMMdd", Locale.ITALY));
}
@Test
public void givenDateInStringAndDateFormatUsingLocaleCanada_thenGettingWeekNumberUsingCalendarIsCorrectlyReturned() throws ParseException {
WeekNumberUsingCalendar calendar = new WeekNumberUsingCalendar();
assertEquals(13, calendar.getWeekNumberFrom("20200322", "yyyyMMdd", Locale.CANADA));
}
@Test
public void givenDateInYearMonthDayNumbersLocaleItaly_thenGettingWeekNumberUsingCalendarIsCorrectlyReturned() {
WeekNumberUsingCalendar calendar = new WeekNumberUsingCalendar();
assertEquals(12, calendar.getWeekNumberFrom(2020, 2, 22, Locale.ITALY));
}
@Test
public void givenDateInYearMonthDayNumbersLocaleItalyChangingWeekCalculationSettings_thenGettingWeekNumberUsingCalendarIsCorrectlyReturned() {
WeekNumberUsingCalendar calendar = new WeekNumberUsingCalendar();
assertEquals(13, calendar.getWeekNumberFrom(2020, 2, 22, Calendar.SUNDAY, 4, Locale.ITALY));
}
@Test
public void givenDateInYearMonthDayNumbersLocaleCanada_thenGettingWeekNumberUsingCalendarIsCorrectlyReturned() {
WeekNumberUsingCalendar calendar = new WeekNumberUsingCalendar();
assertEquals(13, calendar.getWeekNumberFrom(2020, 2, 22, Locale.CANADA));
}
}
core-java-modules/core-java-date-operations-2/src/test/java/com/baeldung/weeknumber/WeekNumberUsingLocalDateUnitTest.java
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package com.baeldung.weeknumber;
import static org.junit.Assert.assertEquals;
import java.util.Locale;
import org.junit.Test;
public class WeekNumberUsingLocalDateUnitTest {
@Test
public void givenDateInStringAndDateFormatUsingWeekFieldsWithLocaleItaly_thenGettingWeekNumberUsingLocalDateIsCorrectlyReturned() {
WeekNumberUsingLocalDate localDate = new WeekNumberUsingLocalDate();
assertEquals(12, localDate.getWeekNumberUsingWeekFiedsFrom("20200322", "yyyyMMdd", Locale.ITALY)
.longValue());
}
@Test
public void givenDateInStringAndDateFormatUsingWeekFieldsWithLocaleCanada_thenGettingWeekNumberUsingLocalDateIsCorrectlyReturned() {
WeekNumberUsingLocalDate localDate = new WeekNumberUsingLocalDate();
assertEquals(13, localDate.getWeekNumberUsingWeekFiedsFrom("20200322", "yyyyMMdd", Locale.CANADA)
.longValue());
}
@Test
public void givenDateInStringAndDateFormatUsingChronoFieds_thenGettingWeekNumberUsingLocalDateIsCorrectlyReturned() {
WeekNumberUsingLocalDate localDate = new WeekNumberUsingLocalDate();
assertEquals(12, localDate.getWeekNumberUsingChronoFieldFrom(2020, 3, 22)
.longValue());
}
@Test
public void givenDateInYearMonthDayNumbersUsingWeekFieldsWithLocaleItaly_thenGettingWeekNumberUsingLocalDateIsCorrectlyReturned() {
WeekNumberUsingLocalDate localDate = new WeekNumberUsingLocalDate();
assertEquals(12, localDate.getWeekNumberUsinWeekFieldsFrom(2020, 3, 22, Locale.ITALY)
.longValue());
}
@Test
public void givenDateInYearMonthDayNumbersUsingWeekFieldsWithLocaleCanada_thenGettingWeekNumberUsingLocalDateIsCorrectlyReturned() {
WeekNumberUsingLocalDate localDate = new WeekNumberUsingLocalDate();
assertEquals(13, localDate.getWeekNumberUsinWeekFieldsFrom(2020, 3, 22, Locale.CANADA)
.longValue());
}
}
core-java-modules/core-java-networking-2/README.md
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@@ -11,4 +11,5 @@ This module contains articles about networking in Java
- [Sending Emails with Java](https://www.baeldung.com/java-email)
- [Authentication with HttpUrlConnection](https://www.baeldung.com/java-http-url-connection)
- [Download a File from an URL in Java](https://www.baeldung.com/java-download-file)
- [Handling java.net.ConnectException](https://www.baeldung.com/java-net-connectexception)
- [[<-- Prev]](/core-java-modules/core-java-networking)
core-java-modules/core-java-regex/src/test/java/com/baeldung/regex/RegexUnitTest.java
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@@ -26,7 +26,6 @@ public class RegexUnitTest {
while (matcher.find())
matches++;
assertEquals(matches, 2);
}
@Test
@@ -452,7 +451,6 @@ public class RegexUnitTest {
Matcher matcher = pattern.matcher("dogs are friendly");
assertTrue(matcher.lookingAt());
assertFalse(matcher.matches());
}
@Test
@@ -460,7 +458,6 @@ public class RegexUnitTest {
Pattern pattern = Pattern.compile("dog");
Matcher matcher = pattern.matcher("dog");
assertTrue(matcher.matches());
}
@Test
@@ -469,7 +466,6 @@ public class RegexUnitTest {
Matcher matcher = pattern.matcher("dogs are domestic animals, dogs are friendly");
String newStr = matcher.replaceFirst("cat");
assertEquals("cats are domestic animals, dogs are friendly", newStr);
}
@Test
@@ -478,7 +474,6 @@ public class RegexUnitTest {
Matcher matcher = pattern.matcher("dogs are domestic animals, dogs are friendly");
String newStr = matcher.replaceAll("cat");
assertEquals("cats are domestic animals, cats are friendly", newStr);
}
public synchronized static int runTest(String regex, String text) {
core-java-modules/core-java-regex/src/test/java/com/baeldung/regex/phonenumbers/PhoneNumbersRegexUnitTest.java
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package com.baeldung.regex.phonenumbers;
import static org.junit.Assert.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.junit.Test;
public class PhoneNumbersRegexUnitTest {
@Test
public void whenMatchesTenDigitsNumber_thenCorrect() {
Pattern pattern = Pattern.compile("^\\d{10}$");
Matcher matcher = pattern.matcher("2055550125");
assertTrue(matcher.matches());
}
@Test
public void whenMOreThanTenDigits_thenNotCorrect() {
Pattern pattern = Pattern.compile("^\\d{10}$");
Matcher matcher = pattern.matcher("20555501251");
assertFalse(matcher.matches());
}
@Test
public void whenMatchesTenDigitsNumberWhitespacesDotHyphen_thenCorrect() {
Pattern pattern = Pattern.compile("^(\\d{3}[- .]?){2}\\d{4}$");
Matcher matcher = pattern.matcher("202 555 0125");
assertTrue(matcher.matches());
}
@Test
public void whenIncludesBracket_thenNotCorrect() {
Pattern pattern = Pattern.compile("^(\\d{3}[- .]?){2}\\d{4}$");
Matcher matcher = pattern.matcher("202]555 0125");
assertFalse(matcher.matches());
}
@Test
public void whenNotStartsWithBatchesOfThreeDigits_thenNotCorrect() {
Pattern pattern = Pattern.compile("^(\\d{3}[- .]?){2}\\d{4}$");
Matcher matcher = pattern.matcher("2021 555 0125");
assertFalse(matcher.matches());
}
@Test
public void whenLastPartWithNoFourDigits_thenNotCorrect() {
Pattern pattern = Pattern.compile("^(\\d{3}[- .]?){2}\\d{4}$");
Matcher matcher = pattern.matcher("202 555 012");
assertFalse(matcher.matches());
}
@Test
public void whenMatchesTenDigitsNumberParenthesis_thenCorrect() {
Pattern pattern = Pattern.compile("^((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$");
Matcher matcher = pattern.matcher("(202) 555-0125");
assertTrue(matcher.matches());
}
@Test
public void whenJustOpeningParenthesis_thenNotCorrect() {
Pattern pattern = Pattern.compile("^((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$");
Matcher matcher = pattern.matcher("(202 555-0125");
assertFalse(matcher.matches());
}
@Test
public void whenJustClosingParenthesis_thenNotCorrect() {
Pattern pattern = Pattern.compile("^((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$");
Matcher matcher = pattern.matcher("202) 555-0125");
assertFalse(matcher.matches());
}
@Test
public void whenMatchesTenDigitsNumberPrefix_thenCorrect() {
Pattern pattern = Pattern.compile("^(\\+\\d{1,3}( )?)?((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$");
Matcher matcher = pattern.matcher("+111 (202) 555-0125");
assertTrue(matcher.matches());
}
@Test
public void whenIncorrectPrefix_thenNotCorrect() {
Pattern pattern = Pattern.compile("^(\\+\\d{1,3}( )?)?((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$");
Matcher matcher = pattern.matcher("-111 (202) 555-0125");
assertFalse(matcher.matches());
}
@Test
public void whenTooLongPrefix_thenNotCorrect() {
Pattern pattern = Pattern.compile("^(\\+\\d{1,3}( )?)?((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$");
Matcher matcher = pattern.matcher("+1111 (202) 555-0125");
assertFalse(matcher.matches());
}
@Test
public void whenMatchesPhoneNumber_thenCorrect() {
String patterns
= "^(\\+\\d{1,3}( )?)?((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$"
+ "|^(\\+\\d{1,3}( )?)?(\\d{3}[ ]?){2}\\d{3}$"
+ "|^(\\+\\d{1,3}( )?)?(\\d{3}[ ]?)(\\d{2}[ ]?){2}\\d{2}$";
String[] validPhoneNumbers
= {"2055550125","202 555 0125", "(202) 555-0125", "+111 (202) 555-0125", "636 856 789", "+111 636 856 789", "636 85 67 89", "+111 636 85 67 89"};
Pattern pattern = Pattern.compile(patterns);
for(String phoneNumber : validPhoneNumbers) {
Matcher matcher = pattern.matcher(phoneNumber);
assertTrue(matcher.matches());
}
}
@Test
public void whenNotMatchesPhoneNumber_thenNotCorrect() {
String patterns
= "^(\\+\\d{1,3}( )?)?((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$"
+ "|^(\\+\\d{1,3}( )?)?(\\d{3}[ ]?){2}\\d{3}$"
+ "|^(\\+\\d{1,3}( )?)?(\\d{3}[ ]?)(\\d{2}[ ]?){2}\\d{2}$";
String[] invalidPhoneNumbers
= {"20555501251","202]555 0125", "2021 555 012", "(202 555-0125", "202) 555-0125", "-111 (202) 555-0125", "+1111 (202) 555-0125", "636 85 789", "636 85 67 893"};
Pattern pattern = Pattern.compile(patterns);
for(String phoneNumber : invalidPhoneNumbers) {
Matcher matcher = pattern.matcher(phoneNumber);
assertFalse(matcher.matches());
}
}
}
core-java-modules/core-java-streams-3/README.md
+1
View File
@@ -10,4 +10,5 @@ This module contains articles about the Stream API in Java.
- [Primitive Type Streams in Java 8](https://www.baeldung.com/java-8-primitive-streams)
- [Debugging Java 8 Streams with IntelliJ](https://www.baeldung.com/intellij-debugging-java-streams)
- [Add BigDecimals using the Stream API](https://www.baeldung.com/java-stream-add-bigdecimals)
- [Should We Close a Java Stream?](https://www.baeldung.com/java-stream-close)
- More articles: [[<-- prev>]](/../core-java-streams-2)
core-kotlin-modules/core-kotlin-lang-2/src/test/kotlin/com/baeldung/late/LateInitUnitTest.kt
+22
View File
@@ -0,0 +1,22 @@
package com.baeldung.late
import org.junit.Test
import kotlin.test.assertFalse
import kotlin.test.assertTrue
class LateInitUnitTest {
private lateinit var answer: String
@Test(expected = UninitializedPropertyAccessException::class)
fun givenLateInit_WhenNotInitialized_ShouldThrowAnException() {
answer.length
}
@Test
fun givenLateInit_TheIsInitialized_ReturnsTheInitializationStatus() {
assertFalse { this::answer.isInitialized }
answer = "42"
assertTrue { this::answer.isInitialized }
}
}
java-collections-conversions/src/main/java/com/baeldung/convertlisttomap/ConvertListToMapService.java
+2 -1
View File
@@ -6,6 +6,7 @@ import org.apache.commons.collections4.MapUtils;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.function.Function;
import java.util.stream.Collectors;
public class ConvertListToMapService {
@@ -21,7 +22,7 @@ public class ConvertListToMapService {
}
public Map<Integer, Animal> convertListAfterJava8(List<Animal> list) {
Map<Integer, Animal> map = list.stream().collect(Collectors.toMap(Animal::getId, animal -> animal));
Map<Integer, Animal> map = list.stream().collect(Collectors.toMap(Animal::getId, Function.identity()));
return map;
}
java-collections-conversions/src/test/java/com/baeldung/convertcollectiontoarraylist/CollectionToArrayListUnitTest.java
+6 -6
View File
@@ -53,14 +53,14 @@ public class CollectionToArrayListUnitTest {
verifyShallowCopy(srcCollection, newList);
}
/**
* Section 5. Deep Copy
*/
@Test
public void whenUsingDeepCopy_thenVerifyDeepCopy() {
ArrayList<Foo> newList = srcCollection.stream()
.map(foo -> foo.deepCopy())
.map(Foo::deepCopy)
.collect(toCollection(ArrayList::new));
verifyDeepCopy(srcCollection, newList);
@@ -83,13 +83,13 @@ public class CollectionToArrayListUnitTest {
* @param a
* @param b
*/
private void verifyShallowCopy(Collection a, Collection b) {
private void verifyShallowCopy(Collection<Foo> a, Collection<Foo> b) {
assertEquals("Collections have different lengths", a.size(), b.size());
Iterator<Foo> iterA = a.iterator();
Iterator<Foo> iterB = b.iterator();
while (iterA.hasNext()) {
// use '==' to test instance identity
assertTrue("Foo instances differ!", iterA.next() == iterB.next());
assertSame("Foo instances differ!", iterA.next(), iterB.next());
}
}
@@ -98,7 +98,7 @@ public class CollectionToArrayListUnitTest {
* @param a
* @param b
*/
private void verifyDeepCopy(Collection a, Collection b) {
private void verifyDeepCopy(Collection<Foo> a, Collection<Foo> b) {
assertEquals("Collections have different lengths", a.size(), b.size());
Iterator<Foo> iterA = a.iterator();
Iterator<Foo> iterB = b.iterator();
@@ -106,7 +106,7 @@ public class CollectionToArrayListUnitTest {
Foo nextA = iterA.next();
Foo nextB = iterB.next();
// should not be same instance
assertFalse("Foo instances are the same!", nextA == nextB);
assertNotSame("Foo instances are the same!", nextA, nextB);
// but should have same content
assertFalse("Foo instances have different content!", fooDiff(nextA, nextB));
}
java-collections-conversions/src/test/java/com/baeldung/convertiteratortolist/ConvertIteratorToListServiceUnitTest.java
+3 -3
View File
@@ -23,7 +23,7 @@ public class ConvertIteratorToListServiceUnitTest {
Iterator<Integer> iterator;
@Before
public void setUp() throws Exception {
public void setUp() {
iterator = Arrays.asList(1, 2, 3)
.iterator();
}
@@ -31,7 +31,7 @@ public class ConvertIteratorToListServiceUnitTest {
@Test
public void givenAnIterator_whenConvertIteratorToListUsingWhileLoop_thenReturnAList() {
List<Integer> actualList = new ArrayList<Integer>();
List<Integer> actualList = new ArrayList<>();
// Convert Iterator to List using while loop dsf
while (iterator.hasNext()) {
@@ -44,7 +44,7 @@ public class ConvertIteratorToListServiceUnitTest {
@Test
public void givenAnIterator_whenConvertIteratorToListAfterJava8_thenReturnAList() {
List<Integer> actualList = new ArrayList<Integer>();
List<Integer> actualList = new ArrayList<>();
// Convert Iterator to List using Java 8
iterator.forEachRemaining(actualList::add);
java-collections-maps-3/README.md
+3
View File
@@ -0,0 +1,3 @@
### Relevant Articles:
- [Java Map With Case-Insensitive Keys](https://www.baeldung.com/java-map-with-case-insensitive-keys)
java-python-interop/README.md
+5
View File
@@ -0,0 +1,5 @@
## Java Python Interop
This module contains articles about Java and Python interoperability.
### Relevant Articles:
java-python-interop/pom.xml
+55
View File
@@ -0,0 +1,55 @@
<?xml version="1.0" encoding="UTF-8" ?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>java-python-interop</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>java-python-interop</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.python</groupId>
<artifactId>jython-slim</artifactId>
<version>${jython.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-exec</artifactId>
<version>${commons-exec.version}</version>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${assertj.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>java-python-interop</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
<resource>
<directory>src/test/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
</build>
<properties>
<jython.version>2.7.2</jython.version>
<commons-exec.version>1.3</commons-exec.version>
<assertj.version>3.6.1</assertj.version>
</properties>
</project>
java-python-interop/src/main/java/com/baeldung/python/interop/ScriptEngineManagerUtils.java
+34
View File
@@ -0,0 +1,34 @@
package com.baeldung.python.interop;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.script.ScriptEngineFactory;
import javax.script.ScriptEngineManager;
public class ScriptEngineManagerUtils {
private static final Logger LOGGER = LoggerFactory.getLogger(ScriptEngineManagerUtils.class);
private ScriptEngineManagerUtils() {
}
public static void listEngines() {
ScriptEngineManager manager = new ScriptEngineManager();
List<ScriptEngineFactory> engines = manager.getEngineFactories();
for (ScriptEngineFactory engine : engines) {
LOGGER.info("Engine name: {}", engine.getEngineName());
LOGGER.info("Version: {}", engine.getEngineVersion());
LOGGER.info("Language: {}", engine.getLanguageName());
LOGGER.info("Short Names:");
for (String names : engine.getNames()) {
LOGGER.info(names);
}
}
}
}
java-python-interop/src/main/resources/logback.xml
+13
View File
@@ -0,0 +1,13 @@
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
</pattern>
</encoder>
</appender>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

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