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macroscopic64
2019-04-19 06:27:45 +05:30
parent b6bf4415a2 15b053c6a8
commit 31f45e8898
516 changed files with 10104 additions and 1235 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
View File
@@ -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
View File
@@ -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;
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/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
View File
@@ -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
+5
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@@ -0,0 +1,5 @@
# Groovy
## Relevant articles:
- [String Matching in Groovy](http://www.baeldung.com/)
core-groovy-2/pom.xml
+80
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@@ -0,0 +1,80 @@
<?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</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-all</artifactId>
<version>${groovy-all.version}</version>
<type>pom</type>
</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>compile</goal>
<goal>compileTests</goal>
</goals>
</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>
<groovy-all.version>2.5.6</groovy-all.version>
<hsqldb.version>2.4.0</hsqldb.version>
<spock-core.version>1.3-groovy-2.5</spock-core.version>
<gmavenplus-plugin.version>1.6.3</gmavenplus-plugin.version>
</properties>
</project>
core-groovy-2/src/test/groovy/com/baeldung/strings/StringMatchingSpec.groovy
+44
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@@ -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/README.md
+3 -1
View File
@@ -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/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-java-11/README.md
+1
View File
@@ -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
View File
@@ -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
View File
@@ -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>
core-java-12/src/test/java/com/baeldung/switchExpression/SwitchUnitTest.java
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@@ -0,0 +1,37 @@
package com.baeldung.switchExpression;
import org.junit.Assert;
import org.junit.Test;
public class SwitchUnitTest {
@Test
public void switchJava12(){
var month = Month.AUG;
var value = switch(month){
case JAN,JUN, JUL -> 3;
case FEB,SEP, OCT, NOV, DEC -> 1;
case MAR,MAY, APR, AUG -> 2;
};
Assert.assertEquals(value, 2);
}
@Test
public void switchLocalVariable(){
var month = Month.AUG;
int i = switch (month){
case JAN,JUN, JUL -> 3;
case FEB,SEP, OCT, NOV, DEC -> 1;
case MAR,MAY, APR, AUG -> {
int j = month.toString().length() * 4;
break j;
}
};
Assert.assertEquals(12, i);
}
enum Month {JAN, FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT, NOV, DEC}
}
core-java-8-2/README.md
+6
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@@ -0,0 +1,6 @@
=========
## Core Java 8 Cookbooks and Examples (part 2)
### Relevant Articles:
- [Anonymous Classes in Java](http://www.baeldung.com/)
core-java-8-2/pom.xml
+43
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@@ -0,0 +1,43 @@
<?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>
<groupId>com.baeldung</groupId>
<artifactId>core-java-8-2</artifactId>
<version>0.1.0-SNAPSHOT</version>
<name>core-java-8-2</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-java</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../parent-java</relativePath>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>${maven.compiler.source}</source>
<target>${maven.compiler.target}</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
core-java-8-2/src/main/java/com/baeldung/anonymous/Book.java
+15
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@@ -0,0 +1,15 @@
package com.baeldung.anonymous;
public class Book {
final String title;
public Book(String title) {
this.title = title;
}
public String description() {
return "Title: " + title;
}
}
core-java-8-2/src/main/java/com/baeldung/anonymous/Main.java
+64
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@@ -0,0 +1,64 @@
package com.baeldung.anonymous;
import java.util.ArrayList;
import java.util.List;
/**
* Code snippet that illustrates the usage of anonymous classes.
*
* Note that use of Runnable instances in this example does not demonstrate their
* common use.
*
* @author A. Shcherbakov
*
*/
public class Main {
public static void main(String[] args) {
final List<Runnable> actions = new ArrayList<Runnable>(2);
Runnable action = new Runnable() {
@Override
public void run() {
System.out.println("Hello from runnable.");
}
};
actions.add(action);
Book book = new Book("Design Patterns") {
@Override
public String description() {
return "Famous GoF book.";
}
};
System.out.println(String.format("Title: %s, description: %s", book.title, book.description()));
actions.add(new Runnable() {
@Override
public void run() {
System.out.println("Hello from runnable #2.");
}
});
int count = 1;
Runnable action2 = new Runnable() {
static final int x = 0;
// static int y = 0;
@Override
public void run() {
System.out.println(String.format("Runnable with captured variables: count = %s, x = %s", count, x));
}
};
actions.add(action2);
for (Runnable a : actions) {
a.run();
}
}
}
core-java-8-2/src/test/java/com/baeldung/UnitTest.java
+18
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@@ -0,0 +1,18 @@
package com.baeldung;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
/**
* Unit test for simple App.
*/
public class UnitTest {
/**
* Stub test
*/
@Test
public void givenPreconditions_whenCondition_shouldResult() {
assertTrue(true);
}
}
core-java-8/README.md
+1 -1
View File
@@ -3,7 +3,7 @@
## Core Java 8 Cookbooks and Examples
### Relevant Articles:
- [Java 8 Collectors](http://www.baeldung.com/java-8-collectors)
- [Guide to Java 8’s Collectors](http://www.baeldung.com/java-8-collectors)
- [Functional Interfaces in Java 8](http://www.baeldung.com/java-8-functional-interfaces)
- [Java 8 – Powerful Comparison with Lambdas](http://www.baeldung.com/java-8-sort-lambda)
- [New Features in Java 8](http://www.baeldung.com/java-8-new-features)

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