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Merge branch 'master' of https://github.com/eugenp/tutorials

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This commit is contained in:
Chirag Dewan
2019-04-27 22:29:09 +05:30
parent af18209504 0ed1685e7c
commit 649cdf0839
738 changed files with 15833 additions and 1422 deletions
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.gitignore
+4
View File
@@ -19,6 +19,7 @@
.idea/
*.iml
*.iws
out/
# Mac
.DS_Store
@@ -27,6 +28,9 @@
log/
target/
# Gradle
.gradle/
spring-openid/src/main/resources/application.properties
.recommenders/
/spring-hibernate4/nbproject/
akka-streams/pom.xml
+3 -2
View File
@@ -14,18 +14,19 @@
<dependencies>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-stream_2.11</artifactId>
<artifactId>akka-stream_${scala.version}</artifactId>
<version>${akkastreams.version}</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-stream-testkit_2.11</artifactId>
<artifactId>akka-stream-testkit_${scala.version}</artifactId>
<version>${akkastreams.version}</version>
</dependency>
</dependencies>
<properties>
<akkastreams.version>2.5.2</akkastreams.version>
<scala.version>2.11</scala.version>
</properties>
</project>
algorithms-miscellaneous-2/src/main/java/com/baeldung/algorithms/reversingtree/TreeNode.java
+42 -42
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@@ -1,42 +1,42 @@
package com.baeldung.algorithms.reversingtree;
public class TreeNode {
private int value;
private TreeNode rightChild;
private TreeNode leftChild;
public int getValue() {
return value;
}
public void setValue(int value) {
this.value = value;
}
public TreeNode getRightChild() {
return rightChild;
}
public void setRightChild(TreeNode rightChild) {
this.rightChild = rightChild;
}
public TreeNode getLeftChild() {
return leftChild;
}
public void setLeftChild(TreeNode leftChild) {
this.leftChild = leftChild;
}
public TreeNode(int value, TreeNode rightChild, TreeNode leftChild) {
this.value = value;
this.rightChild = rightChild;
this.leftChild = leftChild;
}
public TreeNode(int value) {
this.value = value;
}
}
package com.baeldung.algorithms.reversingtree;
public class TreeNode {
private int value;
private TreeNode rightChild;
private TreeNode leftChild;
public int getValue() {
return value;
}
public void setValue(int value) {
this.value = value;
}
public TreeNode getRightChild() {
return rightChild;
}
public void setRightChild(TreeNode rightChild) {
this.rightChild = rightChild;
}
public TreeNode getLeftChild() {
return leftChild;
}
public void setLeftChild(TreeNode leftChild) {
this.leftChild = leftChild;
}
public TreeNode(int value, TreeNode leftChild, TreeNode rightChild) {
this.value = value;
this.rightChild = rightChild;
this.leftChild = leftChild;
}
public TreeNode(int value) {
this.value = value;
}
}
algorithms-miscellaneous-2/src/main/java/com/baeldung/algorithms/reversingtree/TreeReverser.java
+53 -68
View File
@@ -1,68 +1,53 @@
package com.baeldung.algorithms.reversingtree;
import java.util.LinkedList;
public class TreeReverser {
public TreeNode createBinaryTree() {
TreeNode leaf1 = new TreeNode(3);
TreeNode leaf2 = new TreeNode(1);
TreeNode leaf3 = new TreeNode(9);
TreeNode leaf4 = new TreeNode(6);
TreeNode nodeLeft = new TreeNode(2, leaf1, leaf2);
TreeNode nodeRight = new TreeNode(7, leaf3, leaf4);
TreeNode root = new TreeNode(4, nodeRight, nodeLeft);
return root;
}
public void reverseRecursive(TreeNode treeNode) {
if (treeNode == null) {
return;
}
TreeNode temp = treeNode.getLeftChild();
treeNode.setLeftChild(treeNode.getRightChild());
treeNode.setRightChild(temp);
reverseRecursive(treeNode.getLeftChild());
reverseRecursive(treeNode.getRightChild());
}
public void reverseIterative(TreeNode treeNode) {
LinkedList<TreeNode> queue = new LinkedList<TreeNode>();
if (treeNode != null) {
queue.add(treeNode);
}
while (!queue.isEmpty()) {
TreeNode node = queue.poll();
if (node.getLeftChild() != null)
queue.add(node.getLeftChild());
if (node.getRightChild() != null)
queue.add(node.getRightChild());
TreeNode temp = node.getLeftChild();
node.setLeftChild(node.getRightChild());
node.setRightChild(temp);
}
}
public String toString(TreeNode root) {
if (root == null) {
return "";
}
StringBuffer buffer = new StringBuffer(String.valueOf(root.getValue())).append(" ");
buffer.append(toString(root.getLeftChild()));
buffer.append(toString(root.getRightChild()));
return buffer.toString();
}
}
package com.baeldung.algorithms.reversingtree;
import java.util.LinkedList;
public class TreeReverser {
public void reverseRecursive(TreeNode treeNode) {
if (treeNode == null) {
return;
}
TreeNode temp = treeNode.getLeftChild();
treeNode.setLeftChild(treeNode.getRightChild());
treeNode.setRightChild(temp);
reverseRecursive(treeNode.getLeftChild());
reverseRecursive(treeNode.getRightChild());
}
public void reverseIterative(TreeNode treeNode) {
LinkedList<TreeNode> queue = new LinkedList<TreeNode>();
if (treeNode != null) {
queue.add(treeNode);
}
while (!queue.isEmpty()) {
TreeNode node = queue.poll();
if (node.getLeftChild() != null)
queue.add(node.getLeftChild());
if (node.getRightChild() != null)
queue.add(node.getRightChild());
TreeNode temp = node.getLeftChild();
node.setLeftChild(node.getRightChild());
node.setRightChild(temp);
}
}
public String toString(TreeNode root) {
if (root == null) {
return "";
}
StringBuffer buffer = new StringBuffer(String.valueOf(root.getValue())).append(" ");
buffer.append(toString(root.getLeftChild()));
buffer.append(toString(root.getRightChild()));
return buffer.toString();
}
}
algorithms-miscellaneous-2/src/test/java/com/baeldung/algorithms/reversingtree/TreeReverserUnitTest.java
+47 -33
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@@ -1,33 +1,47 @@
package com.baeldung.algorithms.reversingtree;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
public class TreeReverserUnitTest {
@Test
public void givenTreeWhenReversingRecursivelyThenReversed() {
TreeReverser reverser = new TreeReverser();
TreeNode treeNode = reverser.createBinaryTree();
reverser.reverseRecursive(treeNode);
assertEquals("4 7 9 6 2 3 1", reverser.toString(treeNode)
.trim());
}
@Test
public void givenTreeWhenReversingIterativelyThenReversed() {
TreeReverser reverser = new TreeReverser();
TreeNode treeNode = reverser.createBinaryTree();
reverser.reverseIterative(treeNode);
assertEquals("4 7 9 6 2 3 1", reverser.toString(treeNode)
.trim());
}
}
package com.baeldung.algorithms.reversingtree;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
public class TreeReverserUnitTest {
@Test
public void givenTreeWhenReversingRecursivelyThenReversed() {
TreeReverser reverser = new TreeReverser();
TreeNode treeNode = createBinaryTree();
reverser.reverseRecursive(treeNode);
assertEquals("4 7 9 6 2 3 1", reverser.toString(treeNode)
.trim());
}
@Test
public void givenTreeWhenReversingIterativelyThenReversed() {
TreeReverser reverser = new TreeReverser();
TreeNode treeNode = createBinaryTree();
reverser.reverseIterative(treeNode);
assertEquals("4 7 9 6 2 3 1", reverser.toString(treeNode)
.trim());
}
private TreeNode createBinaryTree() {
TreeNode leaf1 = new TreeNode(1);
TreeNode leaf2 = new TreeNode(3);
TreeNode leaf3 = new TreeNode(6);
TreeNode leaf4 = new TreeNode(9);
TreeNode nodeRight = new TreeNode(7, leaf3, leaf4);
TreeNode nodeLeft = new TreeNode(2, leaf1, leaf2);
TreeNode root = new TreeNode(4, nodeLeft, nodeRight);
return root;
}
}
antlr/pom.xml
+9 -7
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@@ -10,6 +10,14 @@
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.antlr</groupId>
<artifactId>antlr4-runtime</artifactId>
<version>${antlr.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
@@ -44,13 +52,7 @@
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.antlr</groupId>
<artifactId>antlr4-runtime</artifactId>
<version>${antlr.version}</version>
</dependency>
</dependencies>
<properties>
<antlr.version>4.7.1</antlr.version>
<mojo.version>3.0.0</mojo.version>
apache-cxf/sse-jaxrs/sse-jaxrs-client/pom.xml
+15 -15
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@@ -12,9 +12,18 @@
<version>0.0.1-SNAPSHOT</version>
</parent>
<properties>
<cxf-version>3.2.0</cxf-version>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-rt-rs-client</artifactId>
<version>${cxf-version}</version>
</dependency>
<dependency>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-rt-rs-sse</artifactId>
<version>${cxf-version}</version>
</dependency>
</dependencies>
<build>
<plugins>
@@ -45,17 +54,8 @@
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-rt-rs-client</artifactId>
<version>${cxf-version}</version>
</dependency>
<dependency>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-rt-rs-sse</artifactId>
<version>${cxf-version}</version>
</dependency>
</dependencies>
<properties>
<cxf-version>3.2.0</cxf-version>
</properties>
</project>
apache-cxf/sse-jaxrs/sse-jaxrs-server/pom.xml
+27 -27
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@@ -13,11 +13,28 @@
<version>0.0.1-SNAPSHOT</version>
</parent>
<properties>
<liberty-maven-plugin.version>2.4.2</liberty-maven-plugin.version>
<failOnMissingWebXml>false</failOnMissingWebXml>
<openliberty-version>18.0.0.2</openliberty-version>
</properties>
<dependencies>
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.json.bind</groupId>
<artifactId>javax.json.bind-api</artifactId>
<version>1.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>${project.artifactId}</finalName>
@@ -59,27 +76,10 @@
</plugins>
</build>
<dependencies>
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.json.bind</groupId>
<artifactId>javax.json.bind-api</artifactId>
<version>1.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
<properties>
<liberty-maven-plugin.version>2.4.2</liberty-maven-plugin.version>
<failOnMissingWebXml>false</failOnMissingWebXml>
<openliberty-version>18.0.0.2</openliberty-version>
</properties>
</project>
apache-meecrowave/pom.xml
+6
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@@ -6,6 +6,12 @@
<version>0.0.1</version>
<name>apache-meecrowave</name>
<description>A sample REST API application with Meecrowave</description>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.apache.meecrowave/meecrowave-core -->
apache-meecrowave/src/test/java/com/baeldung/meecrowave/ArticleEndpointsTest.java → apache-meecrowave/src/test/java/com/baeldung/meecrowave/ArticleEndpointsUnitTest.java
+1 -1
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@@ -17,7 +17,7 @@ import okhttp3.Request;
import okhttp3.Response;
@RunWith(MonoMeecrowave.Runner.class)
public class ArticleEndpointsTest {
public class ArticleEndpointsUnitTest {
@ConfigurationInject
private Meecrowave.Builder config;
autovalue/src/main/java/com/baeldung/autofactory/provided/IntermediateAssembler.java
+2 -1
View File
@@ -1,8 +1,9 @@
package com.baeldung.autofactory.provided;
import com.baeldung.autofactory.model.Camera;
import com.google.auto.factory.AutoFactory;
import com.google.auto.factory.Provided;
import javafx.scene.Camera;
import javax.inject.Provider;
azure/README.md
+1 -1
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@@ -1,4 +1,4 @@
### Relevant Articles:
- [Deploy Spring Boot App to Azure](http://www.baeldung.com/spring-boot-azure)
- [Deploy a Spring Boot App to Azure](http://www.baeldung.com/spring-boot-azure)
blade/README.md
+2 -2
View File
@@ -1,5 +1,5 @@
### Relevant Articles:
- [Blade - A Complete GuideBook](http://www.baeldung.com/blade)
- [Blade – A Complete Guidebook](http://www.baeldung.com/blade)
Run Integration Tests with `mvn integration-test`
Run Integration Tests with `mvn integration-test`
cloud-foundry-uaa/README.md
+3
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@@ -0,0 +1,3 @@
### Revelant Articles
- [A Quick Guide To Using Cloud Foundry UAA](https://www.baeldung.com/cloud-foundry-uaa)
cloud-foundry-uaa/cf-uaa-oauth2-client/pom.xml
+9 -11
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@@ -2,24 +2,20 @@
<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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>cf-uaa-oauth2-client</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>uaa-client-webapp</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<parent>
<artifactId>parent-boot-2</artifactId>
<groupId>com.baeldung</groupId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../../parent-boot-2</relativePath>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
@@ -28,7 +24,6 @@
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-oauth2-client</artifactId>
</dependency>
</dependencies>
<build>
@@ -40,4 +35,7 @@
</plugins>
</build>
<properties>
<java.version>1.8</java.version>
</properties>
</project>
cloud-foundry-uaa/cf-uaa-oauth2-resource-server/pom.xml
+11 -12
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@@ -2,24 +2,20 @@
<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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.baeldung.cfuaa</groupId>
<artifactId>cf-uaa-oauth2-resource-server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>cf-uaa-oauth2-resource-server</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<parent>
<artifactId>parent-boot-2</artifactId>
<groupId>com.baeldung</groupId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../../parent-boot-2</relativePath>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-oauth2-resource-server</artifactId>
@@ -28,7 +24,6 @@
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<build>
@@ -40,4 +35,8 @@
</plugins>
</build>
<properties>
<java.version>1.8</java.version>
</properties>
</project>
core-groovy-2/README.md
+7
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@@ -0,0 +1,7 @@
# Groovy
## Relevant articles:
- [String Matching in Groovy](http://www.baeldung.com/)
- [Groovy def Keyword]
core-groovy-2/pom.xml
+131
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@@ -0,0 +1,131 @@
<?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>core-groovy-2</artifactId>
<version>1.0-SNAPSHOT</version>
<name>core-groovy-2</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy</artifactId>
<version>${groovy.version}</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<version>${groovy-all.version}</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-dateutil</artifactId>
<version>${groovy.version}</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-sql</artifactId>
<version>${groovy-sql.version}</version>
</dependency>
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-runner</artifactId>
<version>${junit.platform.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<version>${hsqldb.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.spockframework</groupId>
<artifactId>spock-core</artifactId>
<version>${spock-core.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.gmavenplus</groupId>
<artifactId>gmavenplus-plugin</artifactId>
<version>${gmavenplus-plugin.version}</version>
<executions>
<execution>
<goals>
<goal>addSources</goal>
<goal>addTestSources</goal>
<goal>compile</goal>
<goal>compileTests</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-failsafe-plugin</artifactId>
<version>${maven-failsafe-plugin.version}</version>
<dependencies>
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-surefire-provider</artifactId>
<version>${junit.platform.version}</version>
</dependency>
</dependencies>
<executions>
<execution>
<id>junit5</id>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
<configuration>
<includes>
<include>**/*Test5.java</include>
</includes>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.20.1</version>
<configuration>
<useFile>false</useFile>
<includes>
<include>**/*Test.java</include>
<include>**/*Spec.java</include>
</includes>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>central</id>
<url>http://jcenter.bintray.com</url>
</repository>
</repositories>
<properties>
<junit.platform.version>1.0.0</junit.platform.version>
<groovy.version>2.5.6</groovy.version>
<groovy-all.version>2.5.6</groovy-all.version>
<groovy-sql.version>2.5.6</groovy-sql.version>
<hsqldb.version>2.4.0</hsqldb.version>
<spock-core.version>1.1-groovy-2.4</spock-core.version>
<gmavenplus-plugin.version>1.6</gmavenplus-plugin.version>
</properties>
</project>
core-groovy-2/src/test/groovy/com/baeldung/defkeyword/DefUnitTest.groovy
+79
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@@ -0,0 +1,79 @@
package com.baeldung.defkeyword
import org.codehaus.groovy.runtime.NullObject
import org.codehaus.groovy.runtime.typehandling.GroovyCastException
import groovy.transform.TypeChecked
import groovy.transform.TypeCheckingMode
@TypeChecked
class DefUnitTest extends GroovyTestCase {
def id
def firstName = "Samwell"
def listOfCountries = ['USA', 'UK', 'FRANCE', 'INDIA']
@TypeChecked(TypeCheckingMode.SKIP)
def multiply(x, y) {
return x*y
}
@TypeChecked(TypeCheckingMode.SKIP)
void testDefVariableDeclaration() {
def list
assert list.getClass() == org.codehaus.groovy.runtime.NullObject
assert list.is(null)
list = [1,2,4]
assert list instanceof ArrayList
}
@TypeChecked(TypeCheckingMode.SKIP)
void testTypeVariables() {
int rate = 200
try {
rate = [12] //GroovyCastException
rate = "nill" //GroovyCastException
} catch(GroovyCastException) {
println "Cannot assign anything other than integer"
}
}
@TypeChecked(TypeCheckingMode.SKIP)
void testDefVariableMultipleAssignment() {
def rate
assert rate == null
assert rate.getClass() == org.codehaus.groovy.runtime.NullObject
rate = 12
assert rate instanceof Integer
rate = "Not Available"
assert rate instanceof String
rate = [1, 4]
assert rate instanceof List
assert divide(12, 3) instanceof BigDecimal
assert divide(1, 0) instanceof String
}
def divide(int x, int y) {
if(y==0) {
return "Should not divide by 0"
} else {
return x/y
}
}
def greetMsg() {
println "Hello! I am Groovy"
}
void testDefVsType() {
def int count
assert count instanceof Integer
}
}
core-groovy-2/src/test/groovy/com/baeldung/strings/StringMatchingSpec.groovy
+44
View File
@@ -0,0 +1,44 @@
package com.baeldung.strings
import spock.lang.Specification
import java.util.regex.Pattern
class StringMatchingSpec extends Specification {
def "pattern operator example"() {
given: "a pattern"
def p = ~'foo'
expect:
p instanceof Pattern
and: "you can use slash strings to avoid escaping of blackslash"
def digitPattern = ~/\d*/
digitPattern.matcher('4711').matches()
}
def "match operator example"() {
expect:
'foobar' ==~ /.*oba.*/
and: "matching is strict"
!('foobar' ==~ /foo/)
}
def "find operator example"() {
when: "using the find operator"
def matcher = 'foo and bar, baz and buz' =~ /(\w+) and (\w+)/
then: "will find groups"
matcher.size() == 2
and: "can access groups using array"
matcher[0][0] == 'foo and bar'
matcher[1][2] == 'buz'
and: "you can use it as a predicate"
'foobarbaz' =~ /bar/
}
}
core-groovy-collections/README.md
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# Groovy
## Relevant articles:
- [Maps in Groovy](http://www.baeldung.com/)
core-groovy-collections/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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>core-groovy-collections</artifactId>
<version>1.0-SNAPSHOT</version>
<name>core-groovy-collections</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy</artifactId>
<version>${groovy.version}</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<version>${groovy-all.version}</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-dateutil</artifactId>
<version>${groovy.version}</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-sql</artifactId>
<version>${groovy-sql.version}</version>
</dependency>
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-runner</artifactId>
<version>${junit.platform.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<version>${hsqldb.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.spockframework</groupId>
<artifactId>spock-core</artifactId>
<version>${spock-core.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.gmavenplus</groupId>
<artifactId>gmavenplus-plugin</artifactId>
<version>${gmavenplus-plugin.version}</version>
<executions>
<execution>
<goals>
<goal>addSources</goal>
<goal>addTestSources</goal>
<goal>compile</goal>
<goal>compileTests</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-failsafe-plugin</artifactId>
<version>${maven-failsafe-plugin.version}</version>
<dependencies>
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-surefire-provider</artifactId>
<version>${junit.platform.version}</version>
</dependency>
</dependencies>
<executions>
<execution>
<id>junit5</id>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
<configuration>
<includes>
<include>**/*Test5.java</include>
</includes>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.20.1</version>
<configuration>
<useFile>false</useFile>
<includes>
<include>**/*Test.java</include>
<include>**/*Spec.java</include>
</includes>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>central</id>
<url>http://jcenter.bintray.com</url>
</repository>
</repositories>
<properties>
<junit.platform.version>1.0.0</junit.platform.version>
<groovy.version>2.5.6</groovy.version>
<groovy-all.version>2.5.6</groovy-all.version>
<groovy-sql.version>2.5.6</groovy-sql.version>
<hsqldb.version>2.4.0</hsqldb.version>
<spock-core.version>1.1-groovy-2.4</spock-core.version>
<gmavenplus-plugin.version>1.6</gmavenplus-plugin.version>
</properties>
</project>
core-groovy-collections/src/test/groovy/com/baeldung/map/MapTest.groovy
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package com.baeldung.map;
import static groovy.test.GroovyAssert.*
import org.junit.Test
class MapTest{
@Test
void createMap() {
def emptyMap = [:]
assertNotNull(emptyMap)
assertTrue(emptyMap instanceof java.util.LinkedHashMap)
def map = [name:"Jerry", age: 42, city: "New York"]
assertTrue(map.size() == 3)
}
@Test
void addItemsToMap() {
def map = [name:"Jerry"]
map["age"] = 42
map.city = "New York"
def hobbyLiteral = "hobby"
def hobbyMap = [(hobbyLiteral): "Singing"]
map.putAll(hobbyMap)
assertTrue(map == [name:"Jerry", age: 42, city: "New York", hobby:"Singing"])
assertTrue(hobbyMap.hobby == "Singing")
assertTrue(hobbyMap[hobbyLiteral] == "Singing")
map.plus([1:20]) // returns new map
map << [2:30]
}
@Test
void getItemsFromMap() {
def map = [name:"Jerry", age: 42, city: "New York", hobby:"Singing"]
assertTrue(map["name"] == "Jerry")
assertTrue(map.name == "Jerry")
def propertyAge = "age"
assertTrue(map[propertyAge] == 42)
}
@Test
void removeItemsFromMap() {
def map = [1:20, a:30, 2:42, 4:34, ba:67, 6:39, 7:49]
def minusMap = map.minus([2:42, 4:34]);
assertTrue(minusMap == [1:20, a:30, ba:67, 6:39, 7:49])
minusMap.removeAll{it -> it.key instanceof String}
assertTrue( minusMap == [ 1:20, 6:39, 7:49])
minusMap.retainAll{it -> it.value %2 == 0}
assertTrue( minusMap == [1:20])
}
@Test
void iteratingOnMaps(){
def map = [name:"Jerry", age: 42, city: "New York", hobby:"Singing"]
map.each{ entry -> println "$entry.key: $entry.value" }
map.eachWithIndex{ entry, i -> println "$i $entry.key: $entry.value" }
map.eachWithIndex{ key, value, i -> println "$i $key: $value" }
}
@Test
void filteringAndSearchingMaps(){
def map = [name:"Jerry", age: 42, city: "New York", hobby:"Singing"]
assertTrue(map.find{ it.value == "New York"}.key == "city")
assertTrue(map.findAll{ it.value == "New York"} == [city : "New York"])
map.grep{it.value == "New York"}.each{ it -> assertTrue(it.key == "city" && it.value == "New York")}
assertTrue(map.every{it -> it.value instanceof String} == false)
assertTrue(map.any{it -> it.value instanceof String} == true)
}
@Test
void collect(){
def map = [1: [name:"Jerry", age: 42, city: "New York"],
2: [name:"Long", age: 25, city: "New York"],
3: [name:"Dustin", age: 29, city: "New York"],
4: [name:"Dustin", age: 34, city: "New York"]]
def names = map.collect{entry -> entry.value.name} // returns only list
assertTrue(names == ["Jerry", "Long", "Dustin", "Dustin"])
def uniqueNames = map.collect([] as HashSet){entry -> entry.value.name}
assertTrue(uniqueNames == ["Jerry", "Long", "Dustin"] as Set)
def idNames = map.collectEntries{key, value -> [key, value.name]}
assertTrue(idNames == [1:"Jerry", 2: "Long", 3:"Dustin", 4: "Dustin"])
def below30Names = map.findAll{it.value.age < 30}.collect{key, value -> value.name}
assertTrue(below30Names == ["Long", "Dustin"])
}
@Test
void group(){
def map = [1:20, 2: 40, 3: 11, 4: 93]
def subMap = map.groupBy{it.value % 2}
println subMap
assertTrue(subMap == [0:[1:20, 2:40 ], 1:[3:11, 4:93]])
def keySubMap = map.subMap([1, 2])
assertTrue(keySubMap == [1:20, 2:40])
}
@Test
void sorting(){
def map = [ab:20, a: 40, cb: 11, ba: 93]
def naturallyOrderedMap = map.sort()
assertTrue([a:40, ab:20, ba:93, cb:11] == naturallyOrderedMap)
def compSortedMap = map.sort({ k1, k2 -> k1 <=> k2 } as Comparator)
assertTrue([a:40, ab:20, ba:93, cb:11] == compSortedMap)
def cloSortedMap = map.sort({ it1, it2 -> it1.value <=> it1.value })
assertTrue([cb:11, ab:20, a:40, ba:93] == cloSortedMap)
}
}
core-groovy/README.md
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@@ -8,6 +8,8 @@
- [Types of Strings in Groovy](https://www.baeldung.com/groovy-strings)
- [A Quick Guide to Iterating a Map in Groovy](https://www.baeldung.com/groovy-map-iterating)
- [An Introduction to Traits in Groovy](https://www.baeldung.com/groovy-traits)
- [Closures in Groovy](https://www.baeldung.com/groovy-closures)
- [Finding Elements in Collections in Groovy](https://www.baeldung.com/groovy-collections-find-elements)
- [Lists in Groovy](https://www.baeldung.com/groovy-lists)
- [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)
- [Guide to I/O in Groovy](https://www.baeldung.com/groovy-io)
core-groovy/src/test/groovy/com/baeldung/map/MapTest.groovy
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@@ -0,0 +1,148 @@
package com.baeldung.groovy.map;
import static groovy.test.GroovyAssert.*
import org.junit.Test
class MapTest{
@Test
void createMap() {
def emptyMap = [:]
assertNotNull(emptyMap)
assertTrue(emptyMap instanceof java.util.LinkedHashMap)
def map = [name:"Jerry", age: 42, city: "New York"]
assertTrue(map.size() == 3)
}
@Test
void addItemsToMap() {
def map = [name:"Jerry"]
map["age"] = 42
map.city = "New York"
def hobbyLiteral = "hobby"
def hobbyMap = [(hobbyLiteral): "Singing"]
map.putAll(hobbyMap)
assertTrue(map == [name:"Jerry", age: 42, city: "New York", hobby:"Singing"])
assertTrue(hobbyMap.hobby == "Singing")
assertTrue(hobbyMap[hobbyLiteral] == "Singing")
map.plus([1:20]) // returns new map
map << [2:30]
}
@Test
void getItemsFromMap() {
def map = [name:"Jerry", age: 42, city: "New York", hobby:"Singing"]
assertTrue(map["name"] == "Jerry")
assertTrue(map.name == "Jerry")
def propertyAge = "age"
assertTrue(map[propertyAge] == 42)
}
@Test
void removeItemsFromMap() {
def map = [1:20, a:30, 2:42, 4:34, ba:67, 6:39, 7:49]
def minusMap = map.minus([2:42, 4:34]);
assertTrue(minusMap == [1:20, a:30, ba:67, 6:39, 7:49])
minusMap.removeAll{it -> it.key instanceof String}
assertTrue( minusMap == [ 1:20, 6:39, 7:49])
minusMap.retainAll{it -> it.value %2 == 0}
assertTrue( minusMap == [1:20])
}
@Test
void iteratingOnMaps(){
def map = [name:"Jerry", age: 42, city: "New York", hobby:"Singing"]
map.each{ entry -> println "$entry.key: $entry.value" }
map.eachWithIndex{ entry, i -> println "$i $entry.key: $entry.value" }
map.eachWithIndex{ key, value, i -> println "$i $key: $value" }
}
@Test
void filteringAndSearchingMaps(){
def map = [name:"Jerry", age: 42, city: "New York", hobby:"Singing"]
assertTrue(map.find{ it.value == "New York"}.key == "city")
assertTrue(map.findAll{ it.value == "New York"} == [city : "New York"])
map.grep{it.value == "New York"}.each{ it -> assertTrue(it.key == "city" && it.value == "New York")}
assertTrue(map.every{it -> it.value instanceof String} == false)
assertTrue(map.any{it -> it.value instanceof String} == true)
}
@Test
void collect(){
def map = [1: [name:"Jerry", age: 42, city: "New York"],
2: [name:"Long", age: 25, city: "New York"],
3: [name:"Dustin", age: 29, city: "New York"],
4: [name:"Dustin", age: 34, city: "New York"]]
def names = map.collect{entry -> entry.value.name} // returns only list
assertTrue(names == ["Jerry", "Long", "Dustin", "Dustin"])
def uniqueNames = map.collect([] as HashSet){entry -> entry.value.name}
assertTrue(uniqueNames == ["Jerry", "Long", "Dustin"] as Set)
def idNames = map.collectEntries{key, value -> [key, value.name]}
assertTrue(idNames == [1:"Jerry", 2: "Long", 3:"Dustin", 4: "Dustin"])
def below30Names = map.findAll{it.value.age < 30}.collect{key, value -> value.name}
assertTrue(below30Names == ["Long", "Dustin"])
}
@Test
void group(){
def map = [1:20, 2: 40, 3: 11, 4: 93]
def subMap = map.groupBy{it.value % 2}
println subMap
assertTrue(subMap == [0:[1:20, 2:40 ], 1:[3:11, 4:93]])
def keySubMap = map.subMap([1, 2])
assertTrue(keySubMap == [1:20, 2:40])
}
@Test
void sorting(){
def map = [ab:20, a: 40, cb: 11, ba: 93]
def naturallyOrderedMap = map.sort()
assertTrue([a:40, ab:20, ba:93, cb:11] == naturallyOrderedMap)
def compSortedMap = map.sort({ k1, k2 -> k1 <=> k2 } as Comparator)
assertTrue([a:40, ab:20, ba:93, cb:11] == compSortedMap)
def cloSortedMap = map.sort({ it1, it2 -> it1.value <=> it1.value })
assertTrue([cb:11, ab:20, a:40, ba:93] == cloSortedMap)
}
}
core-groovy/src/test/groovy/com/baeldung/strings/StringMatchingSpec.groovy
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package com.baeldung.strings
import spock.lang.Specification
import java.util.regex.Pattern
class StringMatchingSpec extends Specification {
def "pattern operator example"() {
given: "a pattern"
def p = ~'foo'
expect:
p instanceof Pattern
and: "you can use slash strings to avoid escaping of blackslash"
def digitPattern = ~/\d*/
digitPattern.matcher('4711').matches()
}
def "match operator example"() {
expect:
'foobar' ==~ /.*oba.*/
and: "matching is strict"
!('foobar' ==~ /foo/)
}
def "find operator example"() {
when: "using the find operator"
def matcher = 'foo and bar, baz and buz' =~ /(\w+) and (\w+)/
then: "will find groups"
matcher.size() == 2
and: "can access groups using array"
matcher[0][0] == 'foo and bar'
matcher[1][2] == 'buz'
and: "you can use it as a predicate"
'foobarbaz' =~ /bar/
}
}
core-java-11/README.md
+1
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@@ -6,3 +6,4 @@
- [Java 11 Nest Based Access Control](https://www.baeldung.com/java-nest-based-access-control)
- [Exploring the New HTTP Client in Java 9 and 11](https://www.baeldung.com/java-9-http-client)
- [An Introduction to Epsilon GC: A No-Op Experimental Garbage Collector](https://www.baeldung.com/jvm-epsilon-gc-garbage-collector)
- [Guide to jlink](https://www.baeldung.com/jlink)
core-java-11/pom.xml
+9
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@@ -14,6 +14,14 @@
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
@@ -31,6 +39,7 @@
<properties>
<maven.compiler.source.version>11</maven.compiler.source.version>
<maven.compiler.target.version>11</maven.compiler.target.version>
<guava.version>27.1-jre</guava.version>
</properties>
</project>
core-java-11/src/test/java/com/baeldung/EmptyStringToEmptyOptionalUnitTest.java
+32
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@@ -0,0 +1,32 @@
package com.baeldung;
import com.google.common.base.Strings;
import org.junit.Assert;
import org.junit.Test;
import java.util.Optional;
import java.util.function.Predicate;
public class EmptyStringToEmptyOptionalUnitTest {
@Test
public void givenEmptyString_whenFilteringOnOptional_thenEmptyOptionalIsReturned() {
String str = "";
Optional<String> opt = Optional.ofNullable(str).filter(s -> !s.isEmpty());
Assert.assertFalse(opt.isPresent());
}
@Test
public void givenEmptyString_whenFilteringOnOptionalInJava11_thenEmptyOptionalIsReturned() {
String str = "";
Optional<String> opt = Optional.ofNullable(str).filter(Predicate.not(String::isEmpty));
Assert.assertFalse(opt.isPresent());
}
@Test
public void givenEmptyString_whenPassingResultOfEmptyToNullToOfNullable_thenEmptyOptionalIsReturned() {
String str = "";
Optional<String> opt = Optional.ofNullable(Strings.emptyToNull(str));
Assert.assertFalse(opt.isPresent());
}
}
core-java-12/pom.xml
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@@ -34,6 +34,7 @@
<configuration>
<source>${maven.compiler.source.version}</source>
<target>${maven.compiler.target.version}</target>
<compilerArgs>--enable-preview</compilerArgs>
</configuration>
</plugin>
</plugins>

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