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This commit is contained in:
Mateo Stjepanović
2021-11-10 00:43:09 +01:00
parent 903b344330
commit 5c5371b500
37 changed files with 1382 additions and 0 deletions
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117
core-java/versions/.mvn/wrapper/MavenWrapperDownloader.java vendored Normal file
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/*
* Copyright 2007-present the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.net.*;
import java.io.*;
import java.nio.channels.*;
import java.util.Properties;
public class MavenWrapperDownloader {
private static final String WRAPPER_VERSION = "0.5.6";
/**
* Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
*/
private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+ WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
/**
* Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
* use instead of the default one.
*/
private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
".mvn/wrapper/maven-wrapper.properties";
/**
* Path where the maven-wrapper.jar will be saved to.
*/
private static final String MAVEN_WRAPPER_JAR_PATH =
".mvn/wrapper/maven-wrapper.jar";
/**
* Name of the property which should be used to override the default download url for the wrapper.
*/
private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
public static void main(String args[]) {
System.out.println("- Downloader started");
File baseDirectory = new File(args[0]);
System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
// If the maven-wrapper.properties exists, read it and check if it contains a custom
// wrapperUrl parameter.
File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
String url = DEFAULT_DOWNLOAD_URL;
if(mavenWrapperPropertyFile.exists()) {
FileInputStream mavenWrapperPropertyFileInputStream = null;
try {
mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
Properties mavenWrapperProperties = new Properties();
mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
} catch (IOException e) {
System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
} finally {
try {
if(mavenWrapperPropertyFileInputStream != null) {
mavenWrapperPropertyFileInputStream.close();
}
} catch (IOException e) {
// Ignore ...
}
}
}
System.out.println("- Downloading from: " + url);
File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
if(!outputFile.getParentFile().exists()) {
if(!outputFile.getParentFile().mkdirs()) {
System.out.println(
"- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
}
}
System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
try {
downloadFileFromURL(url, outputFile);
System.out.println("Done");
System.exit(0);
} catch (Throwable e) {
System.out.println("- Error downloading");
e.printStackTrace();
System.exit(1);
}
}
private static void downloadFileFromURL(String urlString, File destination) throws Exception {
if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
String username = System.getenv("MVNW_USERNAME");
char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
Authenticator.setDefault(new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
});
}
URL website = new URL(urlString);
ReadableByteChannel rbc;
rbc = Channels.newChannel(website.openStream());
FileOutputStream fos = new FileOutputStream(destination);
fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
fos.close();
rbc.close();
}
}

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distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

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# Examples for [Java 8 to 17 - what has changed? on reflectoring.io](https://reflectoring.io/java-8-to-17-what-has-changed)
This repository contains the source code of the article's examples.

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#!/bin/sh
# ----------------------------------------------------------------------------
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
# ----------------------------------------------------------------------------
# ----------------------------------------------------------------------------
# Maven Start Up Batch script
#
# Required ENV vars:
# ------------------
# JAVA_HOME - location of a JDK home dir
#
# Optional ENV vars
# -----------------
# M2_HOME - location of maven2's installed home dir
# MAVEN_OPTS - parameters passed to the Java VM when running Maven
# e.g. to debug Maven itself, use
# set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
# MAVEN_SKIP_RC - flag to disable loading of mavenrc files
# ----------------------------------------------------------------------------
if [ -z "$MAVEN_SKIP_RC" ] ; then
if [ -f /etc/mavenrc ] ; then
. /etc/mavenrc
fi
if [ -f "$HOME/.mavenrc" ] ; then
. "$HOME/.mavenrc"
fi
fi
# OS specific support. $var _must_ be set to either true or false.
cygwin=false;
darwin=false;
mingw=false
case "`uname`" in
CYGWIN*) cygwin=true ;;
MINGW*) mingw=true;;
Darwin*) darwin=true
# Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
# See https://developer.apple.com/library/mac/qa/qa1170/_index.html
if [ -z "$JAVA_HOME" ]; then
if [ -x "/usr/libexec/java_home" ]; then
export JAVA_HOME="`/usr/libexec/java_home`"
else
export JAVA_HOME="/Library/Java/Home"
fi
fi
;;
esac
if [ -z "$JAVA_HOME" ] ; then
if [ -r /etc/gentoo-release ] ; then
JAVA_HOME=`java-config --jre-home`
fi
fi
if [ -z "$M2_HOME" ] ; then
## resolve links - $0 may be a link to maven's home
PRG="$0"
# need this for relative symlinks
while [ -h "$PRG" ] ; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : '.*-> \(.*\)$'`
if expr "$link" : '/.*' > /dev/null; then
PRG="$link"
else
PRG="`dirname "$PRG"`/$link"
fi
done
saveddir=`pwd`
M2_HOME=`dirname "$PRG"`/..
# make it fully qualified
M2_HOME=`cd "$M2_HOME" && pwd`
cd "$saveddir"
# echo Using m2 at $M2_HOME
fi
# For Cygwin, ensure paths are in UNIX format before anything is touched
if $cygwin ; then
[ -n "$M2_HOME" ] &&
M2_HOME=`cygpath --unix "$M2_HOME"`
[ -n "$JAVA_HOME" ] &&
JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
[ -n "$CLASSPATH" ] &&
CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
fi
# For Mingw, ensure paths are in UNIX format before anything is touched
if $mingw ; then
[ -n "$M2_HOME" ] &&
M2_HOME="`(cd "$M2_HOME"; pwd)`"
[ -n "$JAVA_HOME" ] &&
JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
fi
if [ -z "$JAVA_HOME" ]; then
javaExecutable="`which javac`"
if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
# readlink(1) is not available as standard on Solaris 10.
readLink=`which readlink`
if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
if $darwin ; then
javaHome="`dirname \"$javaExecutable\"`"
javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
else
javaExecutable="`readlink -f \"$javaExecutable\"`"
fi
javaHome="`dirname \"$javaExecutable\"`"
javaHome=`expr "$javaHome" : '\(.*\)/bin'`
JAVA_HOME="$javaHome"
export JAVA_HOME
fi
fi
fi
if [ -z "$JAVACMD" ] ; then
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD="$JAVA_HOME/jre/sh/java"
else
JAVACMD="$JAVA_HOME/bin/java"
fi
else
JAVACMD="`which java`"
fi
fi
if [ ! -x "$JAVACMD" ] ; then
echo "Error: JAVA_HOME is not defined correctly." >&2
echo " We cannot execute $JAVACMD" >&2
exit 1
fi
if [ -z "$JAVA_HOME" ] ; then
echo "Warning: JAVA_HOME environment variable is not set."
fi
CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
# traverses directory structure from process work directory to filesystem root
# first directory with .mvn subdirectory is considered project base directory
find_maven_basedir() {
if [ -z "$1" ]
then
echo "Path not specified to find_maven_basedir"
return 1
fi
basedir="$1"
wdir="$1"
while [ "$wdir" != '/' ] ; do
if [ -d "$wdir"/.mvn ] ; then
basedir=$wdir
break
fi
# workaround for JBEAP-8937 (on Solaris 10/Sparc)
if [ -d "${wdir}" ]; then
wdir=`cd "$wdir/.."; pwd`
fi
# end of workaround
done
echo "${basedir}"
}
# concatenates all lines of a file
concat_lines() {
if [ -f "$1" ]; then
echo "$(tr -s '\n' ' ' < "$1")"
fi
}
BASE_DIR=`find_maven_basedir "$(pwd)"`
if [ -z "$BASE_DIR" ]; then
exit 1;
fi
##########################################################################################
# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
# This allows using the maven wrapper in projects that prohibit checking in binary data.
##########################################################################################
if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
if [ "$MVNW_VERBOSE" = true ]; then
echo "Found .mvn/wrapper/maven-wrapper.jar"
fi
else
if [ "$MVNW_VERBOSE" = true ]; then
echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
fi
if [ -n "$MVNW_REPOURL" ]; then
jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
else
jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
fi
while IFS="=" read key value; do
case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
esac
done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
if [ "$MVNW_VERBOSE" = true ]; then
echo "Downloading from: $jarUrl"
fi
wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
if $cygwin; then
wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
fi
if command -v wget > /dev/null; then
if [ "$MVNW_VERBOSE" = true ]; then
echo "Found wget ... using wget"
fi
if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
wget "$jarUrl" -O "$wrapperJarPath"
else
wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
fi
elif command -v curl > /dev/null; then
if [ "$MVNW_VERBOSE" = true ]; then
echo "Found curl ... using curl"
fi
if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
curl -o "$wrapperJarPath" "$jarUrl" -f
else
curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
fi
else
if [ "$MVNW_VERBOSE" = true ]; then
echo "Falling back to using Java to download"
fi
javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
# For Cygwin, switch paths to Windows format before running javac
if $cygwin; then
javaClass=`cygpath --path --windows "$javaClass"`
fi
if [ -e "$javaClass" ]; then
if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
if [ "$MVNW_VERBOSE" = true ]; then
echo " - Compiling MavenWrapperDownloader.java ..."
fi
# Compiling the Java class
("$JAVA_HOME/bin/javac" "$javaClass")
fi
if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
# Running the downloader
if [ "$MVNW_VERBOSE" = true ]; then
echo " - Running MavenWrapperDownloader.java ..."
fi
("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
fi
fi
fi
fi
##########################################################################################
# End of extension
##########################################################################################
export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
if [ "$MVNW_VERBOSE" = true ]; then
echo $MAVEN_PROJECTBASEDIR
fi
MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
# For Cygwin, switch paths to Windows format before running java
if $cygwin; then
[ -n "$M2_HOME" ] &&
M2_HOME=`cygpath --path --windows "$M2_HOME"`
[ -n "$JAVA_HOME" ] &&
JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
[ -n "$CLASSPATH" ] &&
CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
[ -n "$MAVEN_PROJECTBASEDIR" ] &&
MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
fi
# Provide a "standardized" way to retrieve the CLI args that will
# work with both Windows and non-Windows executions.
MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
export MAVEN_CMD_LINE_ARGS
WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
exec "$JAVACMD" \
$MAVEN_OPTS \
-classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
"-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

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@REM ----------------------------------------------------------------------------
@REM Licensed to the Apache Software Foundation (ASF) under one
@REM or more contributor license agreements. See the NOTICE file
@REM distributed with this work for additional information
@REM regarding copyright ownership. The ASF licenses this file
@REM to you under the Apache License, Version 2.0 (the
@REM "License"); you may not use this file except in compliance
@REM with the License. You may obtain a copy of the License at
@REM
@REM https://www.apache.org/licenses/LICENSE-2.0
@REM
@REM Unless required by applicable law or agreed to in writing,
@REM software distributed under the License is distributed on an
@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
@REM KIND, either express or implied. See the License for the
@REM specific language governing permissions and limitations
@REM under the License.
@REM ----------------------------------------------------------------------------
@REM ----------------------------------------------------------------------------
@REM Maven Start Up Batch script
@REM
@REM Required ENV vars:
@REM JAVA_HOME - location of a JDK home dir
@REM
@REM Optional ENV vars
@REM M2_HOME - location of maven2's installed home dir
@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
@REM e.g. to debug Maven itself, use
@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
@REM ----------------------------------------------------------------------------
@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
@echo off
@REM set title of command window
title %0
@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
@if "%MAVEN_BATCH_ECHO%" == "on" echo %MAVEN_BATCH_ECHO%
@REM set %HOME% to equivalent of $HOME
if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
@REM Execute a user defined script before this one
if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
@REM check for pre script, once with legacy .bat ending and once with .cmd ending
if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
:skipRcPre
@setlocal
set ERROR_CODE=0
@REM To isolate internal variables from possible post scripts, we use another setlocal
@setlocal
@REM ==== START VALIDATION ====
if not "%JAVA_HOME%" == "" goto OkJHome
echo.
echo Error: JAVA_HOME not found in your environment. >&2
echo Please set the JAVA_HOME variable in your environment to match the >&2
echo location of your Java installation. >&2
echo.
goto error
:OkJHome
if exist "%JAVA_HOME%\bin\java.exe" goto init
echo.
echo Error: JAVA_HOME is set to an invalid directory. >&2
echo JAVA_HOME = "%JAVA_HOME%" >&2
echo Please set the JAVA_HOME variable in your environment to match the >&2
echo location of your Java installation. >&2
echo.
goto error
@REM ==== END VALIDATION ====
:init
@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
@REM Fallback to current working directory if not found.
set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
set EXEC_DIR=%CD%
set WDIR=%EXEC_DIR%
:findBaseDir
IF EXIST "%WDIR%"\.mvn goto baseDirFound
cd ..
IF "%WDIR%"=="%CD%" goto baseDirNotFound
set WDIR=%CD%
goto findBaseDir
:baseDirFound
set MAVEN_PROJECTBASEDIR=%WDIR%
cd "%EXEC_DIR%"
goto endDetectBaseDir
:baseDirNotFound
set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
cd "%EXEC_DIR%"
:endDetectBaseDir
IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
@setlocal EnableExtensions EnableDelayedExpansion
for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
:endReadAdditionalConfig
SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
)
@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
if exist %WRAPPER_JAR% (
if "%MVNW_VERBOSE%" == "true" (
echo Found %WRAPPER_JAR%
)
) else (
if not "%MVNW_REPOURL%" == "" (
SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
)
if "%MVNW_VERBOSE%" == "true" (
echo Couldn't find %WRAPPER_JAR%, downloading it ...
echo Downloading from: %DOWNLOAD_URL%
)
powershell -Command "&{"^
"$webclient = new-object System.Net.WebClient;"^
"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
"}"^
"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
"}"
if "%MVNW_VERBOSE%" == "true" (
echo Finished downloading %WRAPPER_JAR%
)
)
@REM End of extension
@REM Provide a "standardized" way to retrieve the CLI args that will
@REM work with both Windows and non-Windows executions.
set MAVEN_CMD_LINE_ARGS=%*
%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
if ERRORLEVEL 1 goto error
goto end
:error
set ERROR_CODE=1
:end
@endlocal & set ERROR_CODE=%ERROR_CODE%
if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
@REM check for post script, once with legacy .bat ending and once with .cmd ending
if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
:skipRcPost
@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
if "%MAVEN_BATCH_PAUSE%" == "on" pause
if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
exit /B %ERROR_CODE%

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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>
<groupId>com.reflectoring.io</groupId>
<artifactId>versions</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>17</source>
<target>17</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>17</source>
<target>17</target>
</configuration>
</plugin>
</plugins>
</build>
<modules>
<module>src/main/java/com/reflectoring/io/java9/modules/hellos</module>
<module>src/main/java/com/reflectoring/io/java9/modules/worlds</module>
</modules>
<properties>
<maven.compiler.source>17</maven.compiler.source>
<maven.compiler.target>17</maven.compiler.target>
</properties>
</project>

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core-java/versions/src/main/java/com/reflectoring/io/java10/LocalTypeVar.java Normal file
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package com.reflectoring.io.java10;
import java.util.List;
public class LocalTypeVar {
public static void main(String[] args) {
}
public void explicitTypes(){
Person Roland = new Person("Roland", "Deschain");
Person Susan = new Person("Susan", "Delgado");
Person Eddie = new Person("Eddie", "Dean");
Person Detta = new Person("Detta", "Walker");
Person Jake = new Person("Jake", "Chambers");
List<Person> persons = List.of(Roland, Susan, Eddie, Detta, Jake);
for(Person person : persons){
System.out.println(person.name + " - " + person.lastname);
}
}
public void varTypes(){
var Roland = new Person("Roland", "Deschain");
var Susan = new Person("Susan", "Delgado");
var Eddie = new Person("Eddie", "Dean");
var Detta = new Person("Detta", "Walker");
var Jake = new Person("Jake", "Chambers");
var persons = List.of(Roland, Susan, Eddie, Detta, Jake);
for(var person : persons){
System.out.println(person.name + " - " + person.lastname);
}
}
public class Person{
String name;
String lastname;
public Person(String name, String lastname){
this.name = name;
this.lastname = lastname;
}
}
}

32
core-java/versions/src/main/java/com/reflectoring/io/java11/LocalTypeVarLambda.java Normal file
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package com.reflectoring.io.java11;
import com.reflectoring.io.java10.LocalTypeVar;
import java.util.List;
import java.util.stream.Collectors;
public class LocalTypeVarLambda {
public void explicitTypes(){
var Roland = new Person("Roland", "Deschain");
var Susan = new Person("Susan", "Delgado");
var Eddie = new Person("Eddie", "Dean");
var Detta = new Person("Detta", "Walker");
var Jake = new Person("Jake", "Chambers");
var filteredPersons = List.of(Roland, Susan, Eddie, Detta, Jake)
.stream().filter((var x) -> x.name.contains("a")).collect(Collectors.toList());;
System.out.println(filteredPersons);
}
public class Person{
String name;
String lastname;
public Person(String name, String lastname){
this.name = name;
this.lastname = lastname;
}
}
}

63
core-java/versions/src/main/java/com/reflectoring/io/java14/SwitchExpression.java Normal file
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package com.reflectoring.io.java14;
public class SwitchExpression {
public static void main(String[] args) {
int days = 0;
Month month = Month.APRIL;
days = switch (month){
case JANUARY, MARCH,MAY, JULY, AUGUST,OCTOBER,DECEMBER -> 31;
case FEBRUARY -> 28;
case APRIL, JUNE, SEPTEMBER,NOVEMBER -> 30;
default -> throw new IllegalStateException();
};
days = switch (month){
case JANUARY, MARCH,MAY, JULY, AUGUST,OCTOBER,DECEMBER -> {
System.out.println(month);
yield 31;
}
case FEBRUARY -> {
System.out.println(month);
yield 28;
}
case APRIL, JUNE, SEPTEMBER,NOVEMBER -> {
System.out.println(month);
yield 30;
}
default -> throw new IllegalStateException();
};
switch (month){
case JANUARY, MARCH,MAY, JULY, AUGUST,OCTOBER,DECEMBER:
days=31;
break;
case FEBRUARY:
days=28;
break;
case APRIL, JUNE, SEPTEMBER,NOVEMBER:
days = 30;
break;
default:
throw new IllegalStateException();
}
}
public enum Month{
JANUARY,
FEBRUARY,
MARCH,
APRIL,
MAY,
JUNE,
JULY,
AUGUST,
SEPTEMBER,
OCTOBER,
NOVEMBER,
DECEMBER
}
}

34
core-java/versions/src/main/java/com/reflectoring/io/java15/TextBlocks.java Normal file
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package com.reflectoring.io.java15;
public class TextBlocks {
public static void main(String[] args) {
System.out.println(
"<!DOCTYPE html>\n" +
"<html>\n" +
" <head>\n" +
" <title>Example</title>\n" +
" </head>\n" +
" <body>\n" +
" <p>This is an example of a simple HTML page with one paragraph.</p>\n" +
" </body>\n" +
"</html>\n");
System.out.println(
"""
<!DOCTYPE html>
<html>
<head>
<title>Example</title>
</head>
<body>
<p>This is an example of a simple HTML page with one paragraph.</p>
</body>
</html>
"""
);
// System.out.println(
// """Illegal text block start: missing new line after opening quotes
// """);
}
}

12
core-java/versions/src/main/java/com/reflectoring/io/java16/Bicycle.java Normal file
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package com.reflectoring.io.java16;
public class Bicycle extends Vehicle{
String type;
Long wheelSize;
public Bicycle(String code, String engineType, String type, Long wheelSize) {
super(code, engineType);
this.type = type;
this.wheelSize = wheelSize;
}
}

12
core-java/versions/src/main/java/com/reflectoring/io/java16/Car.java Normal file
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package com.reflectoring.io.java16;
public class Car extends Vehicle{
Long kilomenters;
Long year;
public Car(String code, String engineType, Long kilomenters, Long year) {
super(code, engineType);
this.kilomenters = kilomenters;
this.year = year;
}
}

33
core-java/versions/src/main/java/com/reflectoring/io/java16/PatternMatching.java Normal file
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package com.reflectoring.io.java16;
import java.util.Calendar;
public class PatternMatching {
public static void main(String[] args) {
Car car = new Car("Kia", "Gas", 10000l, 2021l);
Bicycle bicycle = new Bicycle("Greyp", "Electricity", "Mountain", 21l);
System.out.println("Car:" + price(car));
System.out.println("Bycicle: " + price(bicycle));
}
public static double price(Vehicle v){
if(v instanceof Car c){
return 10000 - c.kilomenters*0.01 - (Calendar.getInstance().get(Calendar.YEAR) - c.year)*100;
}else if(v instanceof Bicycle b){
return 1000 + b.wheelSize*10;
}else throw new IllegalArgumentException();
}
public static double priceOld(Vehicle v){
if(v instanceof Car){
Car c = (Car)v;
return 10000 - c.kilomenters*0.01 - (Calendar.getInstance().get(Calendar.YEAR) - c.year)*100;
}else if(v instanceof Bicycle){
Bicycle b = (Bicycle)v;
return 1000 + b.wheelSize*10;
}else throw new IllegalArgumentException();
}
}

50
core-java/versions/src/main/java/com/reflectoring/io/java16/Vehicle.java Normal file
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package com.reflectoring.io.java16;
import java.util.Objects;
public class Vehicle {
String code;
String engineType;
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getEngineType() {
return engineType;
}
public void setEngineType(String engineType) {
this.engineType = engineType;
}
public Vehicle(String code, String engineType) {
this.code = code;
this.engineType = engineType;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Vehicle vehicle = (Vehicle) o;
return code.equals(vehicle.code) && engineType.equals(vehicle.engineType);
}
@Override
public int hashCode() {
return Objects.hash(code, engineType);
}
@Override
public String toString() {
return "Vehicle{" +
"code='" + code + '\'' +
", engineType='" + engineType + '\'' +
'}';
}
}

3
core-java/versions/src/main/java/com/reflectoring/io/java16/VehicleRecord.java Normal file
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package com.reflectoring.io.java16;
public record VehicleRecord(String code, String engineType) {}

12
core-java/versions/src/main/java/com/reflectoring/io/java17/Bicycle.java Normal file
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package com.reflectoring.io.java17;
public final class Bicycle extends Vehicle {
String type;
Long wheelSize;
public Bicycle(String code, String engineType, String type, Long wheelSize) {
super(code, engineType);
this.type = type;
this.wheelSize = wheelSize;
}
}

12
core-java/versions/src/main/java/com/reflectoring/io/java17/Car.java Normal file
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package com.reflectoring.io.java17;
public final class Car extends Vehicle {
Long kilomenters;
Long year;
public Car(String code, String engineType, Long kilomenters, Long year) {
super(code, engineType);
this.kilomenters = kilomenters;
this.year = year;
}
}

4
core-java/versions/src/main/java/com/reflectoring/io/java17/SealedClasses.java Normal file
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package com.reflectoring.io.java17;
public class SealedClasses {
}

50
core-java/versions/src/main/java/com/reflectoring/io/java17/Vehicle.java Normal file
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package com.reflectoring.io.java17;
import java.util.Objects;
public sealed class Vehicle permits Bicycle, Car {
String code;
String engineType;
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getEngineType() {
return engineType;
}
public void setEngineType(String engineType) {
this.engineType = engineType;
}
public Vehicle(String code, String engineType) {
this.code = code;
this.engineType = engineType;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Vehicle vehicle = (Vehicle) o;
return code.equals(vehicle.code) && engineType.equals(vehicle.engineType);
}
@Override
public int hashCode() {
return Objects.hash(code, engineType);
}
@Override
public String toString() {
return "Vehicle{" +
"code='" + code + '\'' +
", engineType='" + engineType + '\'' +
'}';
}
}

22
core-java/versions/src/main/java/com/reflectoring/io/java8/DefaultMethods.java Normal file
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package com.reflectoring.io.java8;
import java.util.Date;
public class DefaultMethods {
public interface Logging{
void log(String message);
default void log(String message, Date date){
System.out.println(date.toString() + ": " + message);
}
}
public class LoggingImplementation implements Logging{
@Override
public void log(String message) {
System.out.println(message);
}
}
}

68
core-java/versions/src/main/java/com/reflectoring/io/java8/LambdaExpressions.java Normal file
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package com.reflectoring.io.java8;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
public class LambdaExpressions {
public static void main(String[] args) {
List<Car> cars = new ArrayList<>();
List<Car> oldWay = findCarsOldWay(cars);
System.out.println(oldWay);
List<Car> oldWayModel = findCarsWithModelOldWay(cars);
System.out.println(oldWayModel);
List<Car> criteriaLambda = findCarsUsingLambdaCriteria(cars, (Car car) -> car.kilometers < 500000 && car.model.equals("Mercedes"));
System.out.println(criteriaLambda);
List<Car> filterLambda = findCarsUsingLambda(cars);
System.out.println(filterLambda);
}
public static List<Car> findCarsUsingLambda(List<Car> cars){
return cars.stream().filter(car -> car.kilometers < 50000).collect(Collectors.toList());
}
public static List<Car> findCarsOldWay(List<Car> cars){
List<Car> selectedCars = new ArrayList<>();
for (Car car: cars) {
if(car.kilometers < 50000){
selectedCars.add(car);
}
}
return selectedCars;
}
public static List<Car> findCarsWithModelOldWay(List<Car> cars){
List<Car> selectedCars = new ArrayList<>();
for(Car car: cars){
if(car.kilometers < 50000 && car.model.equals("Mercedes")){
selectedCars.add(car);
}
}
return selectedCars;
}
public static List<Car> findCarsUsingLambdaCriteria(List<Car> cars, Criteria<Car> criteria){
List<Car> selectedCars = new ArrayList<>();
for(Car car: cars){
if(criteria.evaluate(car)){
selectedCars.add(car);
}
}
return selectedCars;
}
public class Car{
public String model;
public double kilometers;
}
public interface Criteria<T>{
boolean evaluate(T t);
}
}

38
core-java/versions/src/main/java/com/reflectoring/io/java8/MethodReference.java Normal file
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package com.reflectoring.io.java8;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
public class MethodReference {
public static void main(String[] args) {
List<Car> cars = new ArrayList<>();
List<String> withoutMethodReference = cars.stream().map(car -> car.toString()).collect(Collectors.toList());
System.out.println(withoutMethodReference);
List<String> methodReference = cars.stream().map(Car::toString).collect(Collectors.toList());
System.out.println(methodReference);
}
public class Car{
public String model;
public double kilometers;
public Car(String model, double kilometers) {
this.model = model;
this.kilometers = kilometers;
}
@Override
public String toString() {
return "Car{" +
"model='" + model + '\'' +
", kilometers=" + kilometers +
'}';
}
}
}

29
core-java/versions/src/main/java/com/reflectoring/io/java8/RepeatingAnnotations.java Normal file
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package com.reflectoring.io.java8;
import java.lang.annotation.Repeatable;
public class RepeatingAnnotations {
public static void main(String[] args) {
}
@Repeatable(Notifications.class)
public @interface Notify{
String email();
}
public @interface Notifications{
Notify[] value();
}
@Notify(email="admin@company.com")
@Notify(email="owner@company.com")
public class UserNotAllowedForThisActionException extends RuntimeException{
final String user;
public UserNotAllowedForThisActionException(String user){
this.user = user;
}
}
}

36
core-java/versions/src/main/java/com/reflectoring/io/java8/TypeAnnotations.java Normal file
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package com.reflectoring.io.java8;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import static java.lang.annotation.ElementType.TYPE_USE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
public class TypeAnnotations {
public static void main(String[] args) {
@NotNull String userName = args[0];
List<String> request = new @NotEmpty ArrayList<>(Arrays.stream(args).toList());
List<@Email String> emails;
}
@Target(value={TYPE_USE})
@Retention(value=RUNTIME)
public @interface NotNull{}
@Target(value={TYPE_USE})
@Retention(value=RUNTIME)
public @interface NotEmpty{}
@Target(value={TYPE_USE})
@Retention(value=RUNTIME)
public @interface Email{}
}

19
core-java/versions/src/main/java/com/reflectoring/io/java9/DiamondOperator.java Normal file
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package com.reflectoring.io.java9;
public class DiamondOperator {
public static void main(String[] args) {
AppendingString<String> appending = new AppendingString<>() {
@Override
public String append(String a, String b) {
return new StringBuilder(a).append("-").append(b).toString();
}
};
String result = appending.append("Reflectoring", "Blog");
System.out.println(result);
}
public abstract static class AppendingString<T>{
public abstract T append(String a, String b);
}
}

40
core-java/versions/src/main/java/com/reflectoring/io/java9/PrivateInterfaceMethods.java Normal file
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package com.reflectoring.io.java9;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
public class PrivateInterfaceMethods {
public static void main(String[] args) {
TestingNames names = new TestingNames();
System.out.println(names.fetchInitialData());
}
public static class TestingNames implements NamesInterface{
public TestingNames(){}
}
public interface NamesInterface{
default List<String> fetchInitialData(){
try(BufferedReader br = new BufferedReader(new InputStreamReader(this.getClass().getResourceAsStream("/names.txt")))) {
return readNames(br);
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
private List<String> readNames(BufferedReader br) throws IOException {
ArrayList<String> names = new ArrayList<>();
String name;
while((name = br.readLine()) != null){
names.add(name);
}
return names;
}
}
}

37
core-java/versions/src/main/java/com/reflectoring/io/java9/TryWithResources.java Normal file
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package com.reflectoring.io.java9;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.StringReader;
public class TryWithResources {
public static void main(String[] args) {
BufferedReader br = new BufferedReader(new StringReader("Hello world example!"));
try {
System.out.println(br.readLine());
} catch (IOException e) {
e.printStackTrace();
}finally {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
final BufferedReader br2 = new BufferedReader(new StringReader("Hello world example2!"));
try(br2){
System.out.println(br2.readLine());
}
catch (IOException e){
System.out.println("Error happened!");
}
final BufferedReader br3 = new BufferedReader(new StringReader("Hello world example3!"));
try(BufferedReader reader = br3){
System.out.println(reader.readLine());
}catch (IOException e){
System.out.println("Error happened!");
}
}
}

20
core-java/versions/src/main/java/com/reflectoring/io/java9/modules/hellos/pom.xml Normal file
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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">
<parent>
<artifactId>versions</artifactId>
<groupId>com.reflectoring.io</groupId>
<version>1.0-SNAPSHOT</version>
<relativePath>../../../../../../../../../pom.xml</relativePath>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>hello</artifactId>
<properties>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
</properties>
</project>

10
core-java/versions/src/main/java/com/reflectoring/io/java9/modules/hellos/src/main/java/com/reflectoring/io/hello/Hello.java Normal file
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package com.reflectoring.io.hello;
//import com.reflectoring.io.world.World;
public class Hello {
public static void main(String[] args) {
System.out.println("Hello ");
//World.print();
}
}

3
core-java/versions/src/main/java/com/reflectoring/io/java9/modules/hellos/src/main/java/module-info.java Normal file
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module hello.module {
//requires world.module;
}

20
core-java/versions/src/main/java/com/reflectoring/io/java9/modules/worlds/pom.xml Normal file
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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">
<parent>
<artifactId>versions</artifactId>
<groupId>com.reflectoring.io</groupId>
<version>1.0-SNAPSHOT</version>
<relativePath>../../../../../../../../../pom.xml</relativePath>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>untitled</artifactId>
<properties>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
</properties>
</project>

7
core-java/versions/src/main/java/com/reflectoring/io/java9/modules/worlds/src/main/java/com/reflectoring/io/world/World.java Normal file
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package com.reflectoring.io.world;
public class World {
public static void print() {
System.out.println(" com.reflectoring.io.world.World!");
}
}

3
core-java/versions/src/main/java/com/reflectoring/io/java9/modules/worlds/src/main/java/module-info.java Normal file
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@@ -0,0 +1,3 @@
module world.module {
exports com.reflectoring.io.world;
}

8
core-java/versions/src/main/resources/names.txt Normal file
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@@ -0,0 +1,8 @@
John
Martin
Roland
Cuthbert
Alain
Susan
Rhea
Sheemy

3
core-java/versions/src/main/resources/try-with-resources.txt Normal file
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First line
Second line
Third line