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Merge pull request #6 from eugenp/master 

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Kartik Singla 2018-08-08 13:47:47 +05:30 committed by GitHub
parent c1d6c92857 e35e84291e
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538 changed files with 7135 additions and 483 deletions
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13
JGit/src/main/resources/logback.xml Normal file
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<?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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Twitter4J/src/main/resources/logback.xml Normal file
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<?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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activejdbc/src/main/resources/logback.xml Normal file
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<?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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akka-streams/src/main/resources/logback.xml Normal file
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<?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>

1
algorithms/README.md
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@ -23,3 +23,4 @@
- [Converting Between Roman and Arabic Numerals in Java](http://www.baeldung.com/java-convert-roman-arabic)
- [Practical Java Examples of the Big O Notation](http://www.baeldung.com/java-algorithm-complexity)
- [Find the Middle Element of a Linked List](http://www.baeldung.com/java-linked-list-middle-element)
- [An Introduction to the Theory of Big-O Notation](http://www.baeldung.com/big-o-notation)

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algorithms/src/main/resources/logback.xml Normal file
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<?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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animal-sniffer-mvn-plugin/src/main/resources/logback.xml Normal file
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<?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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annotations/annotation-processing/src/main/resources/logback.xml Normal file
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<?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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annotations/annotation-user/src/main/resources/logback.xml Normal file
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<?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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antlr/src/main/resources/logback.xml Normal file
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<?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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apache-avro/README.md Normal file
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### Relevant Articles:
- [Guide to Apache Avro](http://www.baeldung.com/java-apache-avro)

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apache-avro/src/main/resources/logback.xml Normal file
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<?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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apache-bval/src/main/resources/logback.xml Normal file
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<?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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apache-cayenne/src/main/resources/logback.xml Normal file
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<?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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apache-curator/src/main/resources/logback.xml Normal file
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<?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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apache-cxf/cxf-aegis/src/main/resources/logback.xml Normal file
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@ -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>

13
apache-cxf/cxf-introduction/src/main/resources/logback.xml Normal file
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@ -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>

13
apache-cxf/cxf-jaxrs-implementation/src/main/resources/logback.xml Normal file
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@ -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>

13
apache-cxf/cxf-spring/src/main/resources/logback.xml Normal file
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<?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>

13
apache-meecrowave/src/main/resources/logback.xml Normal file
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@ -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>

13
apache-opennlp/src/main/resources/logback.xml Normal file
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@ -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>

13
apache-poi/src/main/resources/logback.xml Normal file
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@ -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>

7
apache-shiro/pom.xml
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@ -8,9 +8,10 @@
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.2.RELEASE</version>
<artifactId>parent-boot-1</artifactId>
<groupId>com.baeldung</groupId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../parent-boot-1</relativePath>
</parent>
<dependencies>

13
apache-solrj/src/main/resources/logback.xml Normal file
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@ -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>

13
apache-spark/src/main/resources/logback.xml Normal file
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@ -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>

13
apache-thrift/src/main/resources/logback.xml Normal file
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@ -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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apache-tika/src/main/resources/logback.xml Normal file
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@ -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>

13
apache-zookeeper/src/main/resources/logback.xml Normal file
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@ -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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asciidoctor/src/main/resources/logback.xml Normal file
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@ -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>

13
asm/src/main/resources/logback.xml Normal file
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@ -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>

13
atomix/src/main/resources/logback.xml Normal file
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@ -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>

13
autovalue/src/main/resources/logback.xml Normal file
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@ -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>

13
aws-lambda/src/main/resources/logback.xml Normal file
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@ -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>

13
aws/src/main/resources/logback.xml Normal file
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@ -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>

13
axon/src/main/resources/logback.xml Normal file
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@ -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>

13
azure/src/main/resources/logback.xml Normal file
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@ -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>

13
bootique/src/main/resources/logback.xml Normal file
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@ -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>

8
cas/cas-secured-app/pom.xml
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@ -10,10 +10,10 @@
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.13.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
<artifactId>parent-boot-1</artifactId>
<groupId>com.baeldung</groupId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../../parent-boot-1</relativePath>
</parent>
<dependencies>

13
cas/cas-secured-app/src/main/resources/logback.xml Normal file
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@ -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>

13
cdi/src/main/resources/logback.xml Normal file
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@ -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>

13
checker-plugin/src/main/resources/logback.xml Normal file
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@ -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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core-groovy/src/main/resources/logback.xml Normal file
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@ -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>

1
core-java-10/README.md
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@ -3,3 +3,4 @@
- [Java 10 LocalVariable Type-Inference](http://www.baeldung.com/java-10-local-variable-type-inference)
- [Guide to Java 10](http://www.baeldung.com/java-10-overview)
- [Copy a List to Another List in Java](http://www.baeldung.com/java-copy-list-to-another)

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core-java-10/src/main/resources/logback.xml Normal file
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@ -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>

13
core-java-11/src/main/resources/logback.xml Normal file
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@ -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>

3
core-java-8/README.md
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@ -56,4 +56,7 @@
- [Generalized Target-Type Inference in Java](http://www.baeldung.com/java-generalized-target-type-inference)
- [Image to Base64 String Conversion](http://www.baeldung.com/java-base64-image-string)
- [Calculate Age in Java](http://www.baeldung.com/java-get-age)
- [Copy a List to Another List in Java](http://www.baeldung.com/java-copy-list-to-another)
- [Increment Date in Java](http://www.baeldung.com/java-increment-date)
- [Add Hours To a Date In Java](http://www.baeldung.com/java-add-hours-date)
- [Overriding System Time for Testing in Java](http://www.baeldung.com/java-override-system-time)

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core-java-8/src/main/resources/logback.xml Normal file
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@ -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>

72
core-java-8/src/test/java/com/baeldung/datetime/UseTimeZoneUnitTest.java Normal file
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@ -0,0 +1,72 @@
package com.baeldung.datetime;
import java.text.SimpleDateFormat;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.junit.Assert;
import org.junit.Test;
public class UseTimeZoneUnitTest {
/* https://en.wikipedia.org/wiki/List_of_tz_database_time_zones */
String timeZone = "Asia/Singapore";
private static final String PATTERN = "E yyyy-MM-dd HH:mm:ss a";
@Test
public void givenDateWithoutTimeZone_WhenSetTimeZoneUsingJava7_ThenTimeZoneIsSetSuccessfully() {
Date nowUtc = new Date();
TimeZone asiaSingapore = TimeZone.getTimeZone(timeZone);
Calendar nowAsiaSingapore = Calendar.getInstance(asiaSingapore);
nowAsiaSingapore.setTime(nowUtc);
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(PATTERN);
simpleDateFormat.setTimeZone(TimeZone.getTimeZone(timeZone));
System.out.println(String.format("Java7: Time now in '%s' is '%s'", nowAsiaSingapore.getTimeZone()
.getID(), simpleDateFormat.format(nowAsiaSingapore.getTime())));
Assert.assertEquals(nowUtc.toInstant().getEpochSecond(), nowAsiaSingapore.toInstant().getEpochSecond());
Assert.assertEquals(asiaSingapore, nowAsiaSingapore.getTimeZone());
}
@Test
public void givenDateWithoutTimeZone_WhenSetTimeZoneUsingJava8_ThenTimeZoneIsSetSuccessfully() {
Instant nowUtc = Instant.now();
ZoneId asiaSingapore = ZoneId.of(timeZone);
ZonedDateTime nowAsiaSingapore = ZonedDateTime.ofInstant(nowUtc, asiaSingapore);
System.out.println(String.format("Java8: Time now in '%s' is '%s'", nowAsiaSingapore.getZone(),
nowAsiaSingapore.format(DateTimeFormatter.ofPattern(PATTERN))));
Assert.assertEquals(nowUtc.getEpochSecond(), nowAsiaSingapore.toEpochSecond());
Assert.assertEquals(asiaSingapore, nowAsiaSingapore.getZone());
}
@Test
public void givenDateWithoutTimeZone_WhenSetTimeZoneUsingJodaTime_ThenTimeZoneIsSetSuccessfully() {
org.joda.time.Instant nowUtc = org.joda.time.Instant.now();
DateTimeZone asiaSingapore = DateTimeZone.forID(timeZone);
DateTime nowAsiaSingapore = nowUtc.toDateTime(asiaSingapore);
System.out.println(String.format("Joda-time: Time now in '%s' is '%s'", nowAsiaSingapore.getZone(),
nowAsiaSingapore.toString(PATTERN)));
Assert.assertEquals(nowUtc.toInstant().getMillis(), nowAsiaSingapore.toInstant().getMillis());
Assert.assertEquals(asiaSingapore, nowAsiaSingapore.getZone());
}
}

5
core-java-collections/README.md
View File

@ -31,3 +31,8 @@
- [How to Store Duplicate Keys in a Map in Java?](http://www.baeldung.com/java-map-duplicate-keys)
- [Getting the Size of an Iterable in Java](http://www.baeldung.com/java-iterable-size)
- [Iterating Backward Through a List](http://www.baeldung.com/java-list-iterate-backwards)
- [How to Filter a Collection in Java](http://www.baeldung.com/java-collection-filtering)
- [Add Multiple Items to an Java ArrayList](http://www.baeldung.com/java-add-items-array-list)
- [Remove the First Element from a List](http://www.baeldung.com/java-remove-first-element-from-list)
- [How to Convert List to Map in Java](http://www.baeldung.com/java-list-to-map)
- [Initializing HashSet at the Time of Construction](http://www.baeldung.com/java-initialize-hashset)

19
core-java-collections/src/main/java/com/baeldung/nullsafecollectionstreams/NullSafeCollectionStreamsUsingCommonsEmptyIfNull.java Normal file
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@ -0,0 +1,19 @@
package com.baeldung.nullsafecollectionstreams;
import java.util.Collection;
import java.util.stream.Stream;
import static org.apache.commons.collections4.CollectionUtils.emptyIfNull;
public class NullSafeCollectionStreamsUsingCommonsEmptyIfNull {
/**
* This method shows how to make a null safe stream from a collection through the use of
* emptyIfNull() method from Apache Commons CollectionUtils library
*
* @param collection The collection that is to be converted into a stream
* @return The stream that has been created from the collection or an empty stream if the collection is null
*/
public Stream<String> collectionAsStream(Collection<String> collection) {
return emptyIfNull(collection).stream();
}
}

21
core-java-collections/src/main/java/com/baeldung/nullsafecollectionstreams/NullSafeCollectionStreamsUsingJava8OptionalContainer.java Normal file
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@ -0,0 +1,21 @@
package com.baeldung.nullsafecollectionstreams;
import java.util.Collection;
import java.util.Optional;
import java.util.stream.Stream;
public class NullSafeCollectionStreamsUsingJava8OptionalContainer {
/**
* This method shows how to make a null safe stream from a collection through the use of
* Java SE 8’s Optional Container
*
* @param collection The collection that is to be converted into a stream
* @return The stream that has been created from the collection or an empty stream if the collection is null
*/
public Stream<String> collectionAsStream(Collection<String> collection) {
return Optional.ofNullable(collection)
.map(Collection::stream)
.orElseGet(Stream::empty);
}
}

19
core-java-collections/src/main/java/com/baeldung/nullsafecollectionstreams/NullSafeCollectionStreamsUsingNullDereferenceCheck.java Normal file
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@ -0,0 +1,19 @@
package com.baeldung.nullsafecollectionstreams;
import java.util.Collection;
import java.util.stream.Stream;
public class NullSafeCollectionStreamsUsingNullDereferenceCheck {
/**
* This method shows how to make a null safe stream from a collection through the use of a check
* to prevent null dereferences
*
* @param collection The collection that is to be converted into a stream
* @return The stream that has been created from the collection or an empty stream if the collection is null
*/
public Stream<String> collectionAsStream(Collection<String> collection) {
return collection == null ? Stream.empty() : collection.stream();
}
}

13
core-java-collections/src/main/resources/logback.xml Normal file
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@ -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>

37
core-java-collections/src/test/java/com/baeldung/nullsafecollectionstreams/NullSafeCollectionStreamsUsingCommonsEmptyIfNullUnitTest.java Normal file
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@ -0,0 +1,37 @@
package com.baeldung.nullsafecollectionstreams;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.stream.Stream;
import org.junit.Test;
import static org.junit.Assert.*;
public class NullSafeCollectionStreamsUsingCommonsEmptyIfNullUnitTest {
private final NullSafeCollectionStreamsUsingCommonsEmptyIfNull instance =
new NullSafeCollectionStreamsUsingCommonsEmptyIfNull();
@Test
public void whenCollectionIsNull_thenExpectAnEmptyStream() {
Collection<String> collection = null;
Stream<String> expResult = Stream.empty();
Stream<String> result = instance.collectionAsStream(collection);
assertStreamEquals(expResult, result);
}
@Test
public void whenCollectionHasElements_thenExpectAStreamOfExactlyTheSameElements() {
Collection<String> collection = Arrays.asList("a", "b", "c");
Stream<String> expResult = Arrays.stream(new String[] { "a", "b", "c" });
Stream<String> result = instance.collectionAsStream(collection);
assertStreamEquals(expResult, result);
}
private static void assertStreamEquals(Stream<?> s1, Stream<?> s2) {
Iterator<?> iter1 = s1.iterator(), iter2 = s2.iterator();
while (iter1.hasNext() && iter2.hasNext())
assertEquals(iter1.next(), iter2.next());
assert !iter1.hasNext() && !iter2.hasNext();
}
}

37
core-java-collections/src/test/java/com/baeldung/nullsafecollectionstreams/NullSafeCollectionStreamsUsingJava8OptionalContainerUnitTest.java Normal file
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@ -0,0 +1,37 @@
package com.baeldung.nullsafecollectionstreams;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.stream.Stream;
import org.junit.Test;
import static org.junit.Assert.*;
public class NullSafeCollectionStreamsUsingJava8OptionalContainerUnitTest {
private final NullSafeCollectionStreamsUsingJava8OptionalContainer instance =
new NullSafeCollectionStreamsUsingJava8OptionalContainer();
@Test
public void whenCollectionIsNull_thenExpectAnEmptyStream() {
Collection<String> collection = null;
Stream<String> expResult = Stream.empty();
Stream<String> result = instance.collectionAsStream(collection);
assertStreamEquals(expResult, result);
}
@Test
public void whenCollectionHasElements_thenExpectAStreamOfExactlyTheSameElements() {
Collection<String> collection = Arrays.asList("a", "b", "c");
Stream<String> expResult = Arrays.stream(new String[] { "a", "b", "c" });
Stream<String> result = instance.collectionAsStream(collection);
assertStreamEquals(expResult, result);
}
private static void assertStreamEquals(Stream<?> s1, Stream<?> s2) {
Iterator<?> iter1 = s1.iterator(), iter2 = s2.iterator();
while (iter1.hasNext() && iter2.hasNext())
assertEquals(iter1.next(), iter2.next());
assert !iter1.hasNext() && !iter2.hasNext();
}
}

38
core-java-collections/src/test/java/com/baeldung/nullsafecollectionstreams/NullSafeCollectionStreamsUsingNullDereferenceCheckUnitTest.java Normal file
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@ -0,0 +1,38 @@
package com.baeldung.nullsafecollectionstreams;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.stream.Stream;
import org.junit.Test;
import static org.junit.Assert.*;
public class NullSafeCollectionStreamsUsingNullDereferenceCheckUnitTest {
private final NullSafeCollectionStreamsUsingNullDereferenceCheck instance =
new NullSafeCollectionStreamsUsingNullDereferenceCheck();
@Test
public void whenCollectionIsNull_thenExpectAnEmptyStream() {
Collection<String> collection = null;
Stream<String> expResult = Stream.empty();
Stream<String> result = instance.collectionAsStream(collection);
assertStreamEquals(expResult, result);
}
@Test
public void whenCollectionHasElements_thenExpectAStreamOfExactlyTheSameElements() {
Collection<String> collection = Arrays.asList("a", "b", "c");
Stream<String> expResult = Arrays.stream(new String[] { "a", "b", "c" });
Stream<String> result = instance.collectionAsStream(collection);
assertStreamEquals(expResult, result);
}
private static void assertStreamEquals(Stream<?> s1, Stream<?> s2) {
Iterator<?> iter1 = s1.iterator(), iter2 = s2.iterator();
while (iter1.hasNext() && iter2.hasNext())
assertEquals(iter1.next(), iter2.next());
assert !iter1.hasNext() && !iter2.hasNext();
}
}

1
core-java-concurrency/README.md
View File

@ -38,3 +38,4 @@
- [Priority-based Job Scheduling in Java](http://www.baeldung.com/java-priority-job-schedule)
- [A Custom Spring SecurityConfigurer](http://www.baeldung.com/spring-security-custom-configurer)
- [Life Cycle of a Thread in Java](http://www.baeldung.com/java-thread-lifecycle)
- [Runnable vs. Callable in Java](http://www.baeldung.com/java-runnable-callable)

13
core-java-persistence/src/main/resources/logback.xml Normal file
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@ -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>

3
core-java/README.md
View File

@ -168,3 +168,6 @@
- [Encrypting and Decrypting Files in Java](http://www.baeldung.com/java-cipher-input-output-stream)
- [How to Get the Size of an Object in Java](http://www.baeldung.com/java-size-of-object)
- [Exception Handling in Java](http://www.baeldung.com/java-exceptions)
- [Guide to Java Instrumentation](http://www.baeldung.com/java-instrumentation)
- [Getting a File’s Mime Type in Java](http://www.baeldung.com/java-file-mime-type)
- [Common Java Exceptions](http://www.baeldung.com/java-common-exceptions)

24
core-java/src/main/java/com/baeldung/fileparser/BufferedReaderExample.java Normal file
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@ -0,0 +1,24 @@
package com.baeldung.fileparser;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
public class BufferedReaderExample {
protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
ArrayList<String> result = new ArrayList<>();
try (BufferedReader br = new BufferedReader(new FileReader(filename))) {
while (br.ready()) {
result.add(br.readLine());
}
return result;
}
}
}

31
core-java/src/main/java/com/baeldung/fileparser/FileReaderExample.java Normal file
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@ -0,0 +1,31 @@
package com.baeldung.fileparser;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
public class FileReaderExample {
protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
ArrayList<String> result = new ArrayList<>();
try (FileReader f = new FileReader(filename)) {
StringBuffer sb = new StringBuffer();
while (f.ready()) {
char c = (char) f.read();
if (c == '\n') {
result.add(sb.toString());
sb = new StringBuffer();
} else {
sb.append(c);
}
}
if (sb.length() > 0) {
result.add(sb.toString());
}
}
return result;
}
}

18
core-java/src/main/java/com/baeldung/fileparser/FilesReadLinesExample.java Normal file
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@ -0,0 +1,18 @@
package com.baeldung.fileparser;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
public class FilesReadLinesExample {
protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
List<String> result = Files.readAllLines(Paths.get(filename));
return (ArrayList<String>) result;
}
}

24
core-java/src/main/java/com/baeldung/fileparser/ScannerIntExample.java Normal file
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@ -0,0 +1,24 @@
package com.baeldung.fileparser;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;
public class ScannerIntExample {
protected static ArrayList<Integer> generateArrayListFromFile(String filename) throws IOException {
ArrayList<Integer> result = new ArrayList<>();
try (Scanner s = new Scanner(new FileReader(filename))) {
while (s.hasNext()) {
result.add(s.nextInt());
}
return result;
}
}
}

24
core-java/src/main/java/com/baeldung/fileparser/ScannerStringExample.java Normal file
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@ -0,0 +1,24 @@
package com.baeldung.fileparser;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;
public class ScannerStringExample {
protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
ArrayList<String> result = new ArrayList<>();
try (Scanner s = new Scanner(new FileReader(filename))) {
while (s.hasNext()) {
result.add(s.nextLine());
}
return result;
}
}
}

19
core-java/src/test/java/com/baeldung/fileparser/BufferedReaderUnitTest.java Normal file
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@ -0,0 +1,19 @@
package com.baeldung.fileparser;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.List;
import org.junit.Test;
public class BufferedReaderUnitTest {
protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
@Test
public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
List<String> lines = BufferedReaderExample.generateArrayListFromFile(TEXT_FILENAME);
assertTrue("File does not has 2 lines", lines.size() == 2);
}
}

19
core-java/src/test/java/com/baeldung/fileparser/FileReaderUnitTest.java Normal file
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@ -0,0 +1,19 @@
package com.baeldung.fileparser;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.List;
import org.junit.Test;
public class FileReaderUnitTest {
protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
@Test
public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
List<String> lines = FileReaderExample.generateArrayListFromFile(TEXT_FILENAME);
assertTrue("File does not has 2 lines", lines.size() == 2);
}
}

19
core-java/src/test/java/com/baeldung/fileparser/FilesReadAllLinesUnitTest.java Normal file
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@ -0,0 +1,19 @@
package com.baeldung.fileparser;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.List;
import org.junit.Test;
public class FilesReadAllLinesUnitTest {
protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
@Test
public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
List<String> lines = FilesReadLinesExample.generateArrayListFromFile(TEXT_FILENAME);
assertTrue("File does not has 2 lines", lines.size() == 2);
}
}

19
core-java/src/test/java/com/baeldung/fileparser/ScannerIntUnitTest.java Normal file
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@ -0,0 +1,19 @@
package com.baeldung.fileparser;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.List;
import org.junit.Test;
public class ScannerIntUnitTest {
protected static final String NUMBER_FILENAME = "src/test/resources/sampleNumberFile.txt";
@Test
public void whenParsingExistingTextFile_thenGetIntArrayList() throws IOException {
List<Integer> numbers = ScannerIntExample.generateArrayListFromFile(NUMBER_FILENAME);
assertTrue("File does not has 2 lines", numbers.size() == 2);
}
}

19
core-java/src/test/java/com/baeldung/fileparser/ScannerStringUnitTest.java Normal file
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@ -0,0 +1,19 @@
package com.baeldung.fileparser;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.List;
import org.junit.Test;
public class ScannerStringUnitTest {
protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
@Test
public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
List<String> lines = ScannerStringExample.generateArrayListFromFile(TEXT_FILENAME);
assertTrue("File does not has 2 lines", lines.size() == 2);
}
}

2
core-java/src/test/resources/sampleNumberFile.txt Normal file
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@ -0,0 +1,2 @@
111
222

2
core-java/src/test/resources/sampleTextFile.txt Normal file
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@ -0,0 +1,2 @@
Hello
World

1
core-kotlin/README.md
View File

@ -37,3 +37,4 @@
- [Create a Java and Kotlin Project with Maven](http://www.baeldung.com/kotlin-maven-java-project)
- [Reflection with Kotlin](http://www.baeldung.com/kotlin-reflection)
- [Get a Random Number in Kotlin](http://www.baeldung.com/kotlin-random-number)
- [Idiomatic Logging in Kotlin](http://www.baeldung.com/kotlin-logging)

13
core-kotlin/src/main/resources/logback.xml Normal file
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@ -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>

21
core-kotlin/src/test/kotlin/com/baeldung/kotlinvsjava/CompanionObjectTest.kt Normal file
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@ -0,0 +1,21 @@
package com.baeldung.kotlinvsjava
import org.junit.Test
import kotlin.test.assertEquals
class CompanionObjectTest {
@Test
fun givenAClassWithCompanionObject_whenCallingMethodTheSameAsStaticOne_thenWeGetAResult() {
assertEquals("A", A.returnClassName())
}
}
class A {
companion object {
fun returnClassName(): String {
return "A"
}
}
}

18
core-kotlin/src/test/kotlin/com/baeldung/kotlinvsjava/ConstructorTest.kt Normal file
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@ -0,0 +1,18 @@
package com.baeldung.kotlinvsjava
import org.junit.Test
import kotlin.test.assertEquals
class ConstructorTests {
@Test
fun givenAClassWithPrimaryConstructor_whenCreatingAnInstance_thenWeGetObject() {
var example = Example(1, "Example")
assertEquals(1, example.id)
assertEquals("Example", example.name)
}
}
class Example constructor(val id: Int, var name: String)

33
core-kotlin/src/test/kotlin/com/baeldung/kotlinvsjava/DataClassTest.kt Normal file
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@ -0,0 +1,33 @@
package com.baeldung.kotlinvsjava
import org.junit.Test
import kotlin.test.assertEquals
import kotlin.test.assertFalse
class DataClassTest {
@Test
fun givenASampleDataClass_whenCallingToStringMethod_thenItReturnsAllProperties() {
val student = Student(1, "John", "Smith")
assertEquals(1, student.id)
assertEquals("John", student.name)
assertEquals("Smith", student.lastName)
assertEquals("Student(id=1, name=John, lastName=Smith)", student.toString())
}
@Test
fun givenASampleDataClass_whenCreatingACopyWithGeneratedFunction_thenItReturnsACopyWithRequestedChanges() {
val student = Student(1, "John", "Smith")
val student2 = student.copy(id = 2, name = "Anne")
assertEquals(2, student2.id)
assertEquals("Anne", student2.name)
assertEquals("Smith", student2.lastName)
assertEquals("Student(id=2, name=Anne, lastName=Smith)", student2.toString())
assertFalse(student.equals(student2))
}
}
data class Student(val id: Int, val name: String, val lastName: String)

27
core-kotlin/src/test/kotlin/com/baeldung/kotlinvsjava/DelegationTest.kt Normal file
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@ -0,0 +1,27 @@
package com.baeldung.kotlinvsjava
import org.junit.Test
import kotlin.test.assertEquals
class DelegationTest {
@Test
fun givenAClassWithDelegation_whenCallDelegatedMethod_thenWeGetAResultDefinedInPassedObject() {
val car = Car(V6Engine())
assertEquals("Vroom", car.makeSound())
}
}
interface Engine {
fun makeSound(): String
}
class V6Engine: Engine {
override fun makeSound(): String {
return "Vroom"
}
}
class Car(e: Engine) : Engine by e

34
core-kotlin/src/test/kotlin/com/baeldung/kotlinvsjava/ExceptionsTest.kt Normal file
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@ -0,0 +1,34 @@
package com.baeldung.kotlinvsjava
import java.io.IOException
import kotlin.test.Test
import kotlin.test.assertEquals
class ExceptionsTest {
@Test
fun givenATryExpression_whenReturning5InLastExpressionOfTryBlock_thenWeGet5() {
val value: Int = try { 5 } catch (e: IOException) { 6 }
assertEquals(5, value)
}
@Test
fun givenATryExpression_whenReturning6InLastExpressionOfCatchBlock_thenWeGet6() {
val value: Int = try { funThrowingException() } catch (e: IOException) { 6 }
assertEquals(6, value)
}
@org.junit.Test(expected = IllegalArgumentException::class)
fun givenANullString_whenUsingElvisOperator_thenExceptionIsThrown() {
val sampleString: String? = null
val length: Int = sampleString?.length ?: throw IllegalArgumentException("String must not be null")
}
private fun funThrowingException(): Nothing {
throw IOException()
}
}

30
core-kotlin/src/test/kotlin/com/baeldung/kotlinvsjava/ExtensionFunctionsTest.kt Normal file
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@ -0,0 +1,30 @@
package com.baeldung.kotlinvsjava
import org.junit.Test
import kotlin.test.assertEquals
class ExtensionFunctionsTest {
@Test
fun givenAStringWithAnExtensionFunction_whenCallingThatFunction_thenItConcatenatesStrings() {
val sampleString = "ABC"
val concatenatedString = sampleString.appendString("DEF")
assertEquals("ABCDEF", concatenatedString)
}
@Test
fun givenAStringWithAnExtensionProperty_whenReadingProperty_thenItReturnsLengthOfString() {
val sampleString = "ABC"
assertEquals(3, sampleString.size)
}
fun String.appendString(str : String): String {
return plus(str)
}
val String.size: Int
get() = length
}

70
core-kotlin/src/test/kotlin/com/baeldung/kotlinvsjava/FunctionsTest.kt Normal file
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@ -0,0 +1,70 @@
package com.baeldung.kotlinvsjava
import org.junit.Test
import kotlin.test.assertEquals
class FunctionsTest {
@Test
fun givenALambdaExpressionConcatenatingString_whenUsingTheFunctionWithAAndBString_thenWeGetAB() {
val concat: (String, String) -> String = { a, b -> a + b }
assertEquals("AB", concat("A","B"))
}
@Test
fun givenAnAnonymousFunctionConcatenatingString_whenUsingTheFunctionWithAAndBString_thenWeGetAB() {
val concat: (String, String) -> String = fun(a: String, b: String): String { return a + b }
assertEquals("AB", concat("A","B"))
}
@Test
fun givenAnPlusMethodOfString_whenUsingTheFunctionWithAAndBString_thenWeGetAB() {
val concat = String::plus
assertEquals("AB", concat("A","B"))
}
@Test
fun givenAStringConstractorAssignedToFunction_whenUsingFunctionReference_thenWeGetNewString() {
val concat = ::String
assertEquals("A", concat().plus("A"))
}
@Test
fun givenAClassImplementingAFunctionType_whenUsingTheFunctionWithAAndBString_thenWeGetAB() {
val concat = StringConcatenation()
assertEquals("AB", concat("A", "B"))
}
@Test
fun givenALambdaExpressionWithReceiver_whenUsingTheFunctionWithReceiver_thenWeGetABC() {
val concat: String.(String, String) -> String = { a, b -> plus(a).plus(b) }
assertEquals("ABC", "A".concat("B", "C"))
}
@Test
fun givenALambdaExpressionWithinLambdaExpression_whenUsingTheFunction_thenWeGetAB() {
val concat: (String) -> ((String) -> String) = { a -> {b -> a + b} }
assertEquals("AB", (concat("A")("B")))
}
@Test
fun given3NestedLambdaExpression_whenUsingTheFunction_thenWeGetABC() {
val concat: (String) -> (String) -> (String) -> String = { a -> {b -> { c -> a + b + c} } }
assertEquals("ABC", concat("A")("B")("C"))
}
}
class StringConcatenation: (String, String) -> String {
override fun invoke(p1: String, p2: String): String {
return p1 + p2
}
}

36
core-kotlin/src/test/kotlin/com/baeldung/kotlinvsjava/IsOperatorTest.kt Normal file
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@ -0,0 +1,36 @@
package com.baeldung.kotlinvsjava
import org.junit.Test
import kotlin.math.absoluteValue
import kotlin.test.assertEquals
import kotlin.test.assertTrue
class IsOperatorTest {
@Test
fun givenSampleValue_whenUsingIsOperatorInIfStatement_thenItCastsAutomaticallyToString() {
val value: Any = "string"
if(value is String) {
assertEquals(6, value.length)
}
}
@Test
fun givenSampleValue_whenUsingIsOperatorWithAndOperator_thenItCastsAutomaticallyToString() {
val value: Any = "string"
assertTrue(value is String && value.length == 6)
}
@Test
fun givenSampleValue_whenUsingWithWhenOperator_thenItCastsAutomaticallyToString() {
val value: Any = "string"
when(value) {
is String -> assertEquals(6, value.length)
is Int -> assertEquals(6, value.absoluteValue)
}
}
}

67
core-kotlin/src/test/kotlin/com/baeldung/kotlinvsjava/NullSafetyTest.kt Normal file
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@ -0,0 +1,67 @@
package com.baeldung.kotlinvsjava
import kotlin.test.Test
import java.lang.NullPointerException
import kotlin.test.assertEquals
import kotlin.test.assertNotNull
import kotlin.test.assertNull
class NullSafetyTest {
@Test
fun givenStringAndNull_whenUsingSafeCallOperatorWithLengthMethod_thenReturnsLengthForStringAndNullForNull() {
val stringValue: String? = "string"
val nullValue: String? = null
assertNotNull(stringValue?.length)
assertNull(nullValue?.length)
}
@Test(expected = NullPointerException::class)
fun givenNullReference_whenUsingTheNotNullAssertionOperator_thenItThrowsNullPointerException() {
val stringValue: String? = "string"
val nullValue: String? = null
assertNotNull(stringValue!!.length)
nullValue!!.length
}
@Test
fun givenStringAndNull_whenUsingElvisOperator_thenItTestsAgainstNullAndReturnsTheProperValue() {
val stringValue: String? = "string"
val nullValue: String? = null
val shouldBeLength: Int = stringValue?.length ?: -1
val souldBeMinusOne: Int = nullValue?.length ?: -1
assertEquals(6, shouldBeLength)
assertEquals(-1, souldBeMinusOne)
}
@Test
fun givenString_whenCastingToInt_thenItReturnsNull() {
val stringValue: String? = "string"
val intValue: Int? = stringValue as? Int
assertNull(intValue)
}
@Test
fun givenCollectionWithNulls_whenFilterNonNull_thenItReturnsCollectionWithoutNulls() {
val list: List<String?> = listOf("a", "b", null)
val nonNullList = list.filterNotNull()
assertEquals(2, nonNullList.size)
assertEquals(nonNullList, listOf("a", "b"))
}
@Test
fun givenCollectionWithNulls_whenLetWithSafeCallOperator_thenItOmitsNulls() {
val list: List<String?> = listOf("a", "b", null)
for(elem in list) {
elem?.let { assertNotNull(it) }
}
}
}

61
core-kotlin/src/test/kotlin/com/baeldung/kotlinvsjava/OperatorsOverloadingTest.kt Normal file
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package com.baeldung.kotlinvsjava
import org.junit.Test
import kotlin.test.assertEquals
import kotlin.test.assertTrue
class OperatorsOverloadingTest {
@Test
fun givenThePlaneClassWithOverloadedIncrementationOperator_whenCallingTheOperator_thenItIncreasesSpeed(){
var plane = Plane(0.0)
plane++
assertEquals(50.0, plane.currentSpeed)
}
@Test
fun givenThePlaneClassWithOverloadedMinusOperator_whenCallingTheOperator_thenItDecreaseSpeed(){
var plane = Plane(1000.0)
plane - 500.0
assertEquals(500.0, plane.currentSpeed)
}
@Test
fun givenThePlaneClassWithOverloadedInvokeOperator_whenCallingTheOperator_thenItSetSpeed(){
var plane = Plane(0.0)
plane(150.0)
assertEquals(150.0, plane.currentSpeed)
}
@Test
fun given2PlaneObjectWithOverloadedComparisonOperator_whenCallingTheOperator_thenItComparesSpeedValues(){
var plane = Plane(0.0)
var plane2 = Plane(150.0)
assertTrue(plane < (plane2))
}
}
class Plane(var currentSpeed: Double) {
operator fun inc(): Plane {
currentSpeed += 50.0
return this
}
operator fun minus(number: Double) {
currentSpeed = if(currentSpeed < number) 0.0 else currentSpeed - number
}
operator fun invoke(speed: Double) {
currentSpeed = speed
}
operator fun compareTo(plane: Plane): Int {
return currentSpeed.compareTo(plane.currentSpeed)
}
}

32
core-kotlin/src/test/kotlin/com/baeldung/kotlinvsjava/PropertiesTest.kt Normal file
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package com.baeldung.kotlinvsjava
import org.junit.Test
import java.math.BigDecimal
import kotlin.test.assertEquals
class PropertiesTest {
@Test
fun givenASampleClassWithValAndVarProperties_whenSettingPrice_thenWeGetZeroOrOne() {
val product = Product()
product.price = BigDecimal(10)
val product2 = Product()
product2.price = null
assertEquals("empty", product.id)
assertEquals("empty", product2.id)
assertEquals(BigDecimal(10), product.price)
assertEquals(BigDecimal(1), product2.price)
}
}
class Product {
val id: String? = "empty"
var price: BigDecimal? = BigDecimal.ZERO
set(value) = if(value == null) { field = BigDecimal.ONE} else { field = value }
}

13
custom-pmd/src/main/resources/logback.xml Normal file
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@ -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>

13
dagger/src/main/resources/logback.xml Normal file
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@ -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>

13
data-structures/src/main/resources/logback.xml Normal file
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@ -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>

13
deeplearning4j/src/main/resources/logback.xml Normal file
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@ -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>

13
deltaspike/src/main/resources/logback.xml Normal file
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@ -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>

13
disruptor/src/main/resources/logback.xml Normal file
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@ -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>

13
dozer/src/main/resources/logback.xml Normal file
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@ -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>

13
drools/src/main/resources/logback.xml Normal file
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@ -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>

13
dubbo/src/main/resources/logback.xml Normal file
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@ -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>

1
ejb/README.md
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@ -3,3 +3,4 @@
- [Guide to EJB Set-up](http://www.baeldung.com/ejb-intro)
- [Java EE Session Beans](http://www.baeldung.com/ejb-session-beans)
- [Introduction to EJB JNDI Lookup on WildFly Application Server](http://www.baeldung.com/wildfly-ejb-jndi)
- [A Guide to Message Driven Beans in EJB](http://www.baeldung.com/ejb-message-driven-beans)

13
ejb/ejb-client/src/main/resources/logback.xml Normal file
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@ -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>

13
ejb/ejb-remote/src/main/resources/logback.xml Normal file
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@ -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>

13
ejb/ejb-session-beans/src/main/resources/logback.xml Normal file
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@ -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>

13
ejb/wildfly/widlfly-web/src/main/resources/logback.xml Normal file
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@ -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>

13
ejb/wildfly/wildfly-ejb-interfaces/src/main/resources/logback.xml Normal file
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@ -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>

13
ejb/wildfly/wildfly-ejb/src/main/resources/logback.xml Normal file
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@ -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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