Merge pull request #36 from eugenp/master

update
This commit is contained in:
Maiklins 2020-02-18 14:55:35 +01:00 committed by GitHub
commit 62263d9ca3
24 changed files with 585 additions and 7 deletions

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This module contains articles about core Java input and output (IO)
### Relevant Articles:
- [Java Read from File](https://www.baeldung.com/java-read-file)
- [How to Read a File in Java](https://www.baeldung.com/reading-file-in-java)
- [Read a File into an ArrayList](https://www.baeldung.com/java-file-to-arraylist)
- [Java Directory Size](https://www.baeldung.com/java-folder-size)
- [File Size in Java](https://www.baeldung.com/java-file-size)

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gradle-6/.gitignore vendored Normal file
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# Gradle
.gradle
build
# Ignore Gradle GUI config
gradle-app.setting
# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
!gradle-wrapper.jar
# Cache of project
.gradletasknamecache
# # Work around https://youtrack.jetbrains.com/issue/IDEA-116898
# gradle/wrapper/gradle-wrapper.properties

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subprojects {
repositories {
mavenCentral()
}
}

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plugins {
base
}
description = """
Demonstrates Gradle Configuraiton Avoidance API. Creates a new configuration "extralibs" to
which we add dependencies. The custom task "copyExtraLibs" copies those dependencies to a new
build directory "extra-libs". This build uses the Task Configuraion Avoidance APIs which have
been marked stable in Gradle 6.0
""".trimIndent()
// extraLibs is a NamedDomainObjectProvider<Configuration!> - the Configuration object will not be
// realized until it is needed. In the meantime, the build may reference it by name
val extralibs by configurations.registering
dependencies {
// we can call extralibs.name without causing the extralibs to be realized
add(extralibs.name, "junit:junit:4.12")
}
// extraLibsDir is a Provider<Directory!> - the Directory object will not be realized until it is
// needed
val extraLibsDir = project.layout.buildDirectory.dir("extra-libs")
// copyExtraLibs is a TaskProvider<Copy!> - the task will not be realized until it is needed
val copyExtraLibs by tasks.registering(Copy::class) {
// the copy task's "from" and "into" APIs accept Provider types to support configuration
// avoidance
from(extralibs)
into(extraLibsDir)
}
// configures the "build" task only if it needs to be
tasks.build {
// dependsOn accepts a TaskProvider to avoid realizing the copyExtraLibs needlessly
dependsOn(copyExtraLibs)
}

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plugins {
`java-library`
}
group = "com.baeldung"
version = "1.0.0"
dependencies {
api("io.reactivex.rxjava2:rxjava:2.2.16")
implementation("com.google.guava:guava") {
version {
require("10.0")
prefer("28.1-jre")
because("Only uses ImmutableList type, so any version since 2.0 will do, but tested with 28.1-jre")
}
}
testImplementation("org.junit.jupiter:junit-jupiter-api:5.5.2")
testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.5.2")
}
tasks.compileJava {
sourceCompatibility = "1.8"
targetCompatibility = "1.8"
}
tasks.test {
useJUnitPlatform()
}

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package com.baeldung.gradle;
import com.google.common.collect.ImmutableList;
import io.reactivex.Observable;
import java.util.List;
/**
* Demonstrates a library type that returns an RxJava type.
*/
public class RxHelloWorld {
/**
* @return an {@link Observable} that emits events "hello" and "world" before completing.
*/
public static Observable<String> hello() {
// Guava ImmutableList class is an implementation detail.
List<String> values = ImmutableList.of("hello", "world");
return Observable.fromIterable(values);
}
private RxHelloWorld() {
}
}

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package com.baeldung.gradle;
import org.junit.jupiter.api.Test;
import static com.baeldung.gradle.RxHelloWorld.hello;
/**
* Unit test for {@link RxHelloWorld}.
*/
final class RxHelloWorldUnitTest {
@Test void it_emits_hello_world_values() {
hello().test().assertValues("hello", "world").assertComplete();
}
}

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plugins {
`java-library`
}
dependencies {
api(project(":fibonacci-spi"))
compileOnly("com.google.auto.service:auto-service-annotations:1.0-rc6")
annotationProcessor("com.google.auto.service:auto-service:1.0-rc6")
testImplementation(testFixtures(project(":fibonacci-spi")))
testImplementation("org.junit.jupiter:junit-jupiter-api:5.5.2")
testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.5.2")
}
tasks.test {
useJUnitPlatform()
}

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package com.baeldung.fibonacci.impl;
import com.baeldung.fibonacci.FibonacciSequenceGenerator;
import com.google.auto.service.AutoService;
/**
* Recursive implementation of the {@link FibonacciSequenceGenerator}.
*/
@AutoService(FibonacciSequenceGenerator.class) public final class RecursiveFibonacci implements FibonacciSequenceGenerator {
@Override public int generate(int nth) {
if (nth < 0) {
throw new IllegalArgumentException("sequence number must be 0 or greater");
}
if (nth <= 1) {
return nth;
}
return generate(nth - 1) + generate(nth - 2);
}
}

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package com.baeldung.fibonacci.impl;
import com.baeldung.fibonacci.FibonacciSequenceGenerator;
import com.baeldung.fibonacci.FibonacciSequenceGeneratorFixture;
/**
* Unit test which reuses the {@link FibonacciSequenceGeneratorFixture} test mix-in exported from the fibonacci-spi project.
*/
final class RecursiveFibonacciUnitTest implements FibonacciSequenceGeneratorFixture {
@Override public FibonacciSequenceGenerator provide() {
return new RecursiveFibonacci();
}
}

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plugins {
`java-library`
`java-test-fixtures`
}
dependencies {
testFixturesApi("org.junit.jupiter:junit-jupiter-api:5.5.2")
testFixturesImplementation("org.junit.jupiter:junit-jupiter-engine:5.5.2")
}
tasks.test {
useJUnitPlatform()
}

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package com.baeldung.fibonacci;
/**
* Describes an SPI for a Fibonacci sequence generator function.
*/
public interface FibonacciSequenceGenerator {
/**
* @param nth the index of the number in the fibonacci sequence
* @return the nth number in the fibonacci sequence
*/
int generate(int nth);
}

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package com.baeldung.fibonacci;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
/**
* Reusable test fixture for {@link FibonacciSequenceGenerator} implementations. Tests will be skipped if no such implementation exists.
*/
public interface FibonacciSequenceGeneratorFixture {
/**
* @return the implementation of {@link FibonacciSequenceGenerator} to test. Must not be null
*/
FibonacciSequenceGenerator provide();
@Test default void when_sequence_index_is_negative_then_throws() {
final FibonacciSequenceGenerator generator = provide();
assertThrows(IllegalArgumentException.class, () -> generator.generate(-1));
}
@Test default void when_given_index_then_generates_fibonacci_number() {
final FibonacciSequenceGenerator generator = provide();
final int[] sequence = { 0, 1, 1, 2, 3, 5, 8 };
for (int i = 0; i < sequence.length; i++) {
assertEquals(sequence[i], generator.generate(i));
}
}
}

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org.gradle.parallel=true
org.gradle.configureondemand=true

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distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-6.0.1-bin.zip
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists

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gradle-6/gradlew vendored Executable file
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#!/usr/bin/env sh
#
# Copyright 2015 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
#
# 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.
#
##############################################################################
##
## Gradle start up script for UN*X
##
##############################################################################
# Attempt to set APP_HOME
# Resolve links: $0 may be a link
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"`"/$link"
fi
done
SAVED="`pwd`"
cd "`dirname \"$PRG\"`/" >/dev/null
APP_HOME="`pwd -P`"
cd "$SAVED" >/dev/null
APP_NAME="Gradle"
APP_BASE_NAME=`basename "$0"`
# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD="maximum"
warn () {
echo "$*"
}
die () {
echo
echo "$*"
echo
exit 1
}
# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
nonstop=false
case "`uname`" in
CYGWIN* )
cygwin=true
;;
Darwin* )
darwin=true
;;
MINGW* )
msys=true
;;
NONSTOP* )
nonstop=true
;;
esac
CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
# Determine the Java command to use to start the JVM.
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
if [ ! -x "$JAVACMD" ] ; then
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
else
JAVACMD="java"
which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
# Increase the maximum file descriptors if we can.
if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
MAX_FD_LIMIT=`ulimit -H -n`
if [ $? -eq 0 ] ; then
if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
MAX_FD="$MAX_FD_LIMIT"
fi
ulimit -n $MAX_FD
if [ $? -ne 0 ] ; then
warn "Could not set maximum file descriptor limit: $MAX_FD"
fi
else
warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
fi
fi
# For Darwin, add options to specify how the application appears in the dock
if $darwin; then
GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
fi
# For Cygwin or MSYS, switch paths to Windows format before running java
if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
APP_HOME=`cygpath --path --mixed "$APP_HOME"`
CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
JAVACMD=`cygpath --unix "$JAVACMD"`
# We build the pattern for arguments to be converted via cygpath
ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
SEP=""
for dir in $ROOTDIRSRAW ; do
ROOTDIRS="$ROOTDIRS$SEP$dir"
SEP="|"
done
OURCYGPATTERN="(^($ROOTDIRS))"
# Add a user-defined pattern to the cygpath arguments
if [ "$GRADLE_CYGPATTERN" != "" ] ; then
OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
fi
# Now convert the arguments - kludge to limit ourselves to /bin/sh
i=0
for arg in "$@" ; do
CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
else
eval `echo args$i`="\"$arg\""
fi
i=`expr $i + 1`
done
case $i in
0) set -- ;;
1) set -- "$args0" ;;
2) set -- "$args0" "$args1" ;;
3) set -- "$args0" "$args1" "$args2" ;;
4) set -- "$args0" "$args1" "$args2" "$args3" ;;
5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
esac
fi
# Escape application args
save () {
for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
echo " "
}
APP_ARGS=`save "$@"`
# Collect all arguments for the java command, following the shell quoting and substitution rules
eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
exec "$JAVACMD" "$@"

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@rem
@rem Copyright 2015 the original author or authors.
@rem
@rem Licensed under the Apache License, Version 2.0 (the "License");
@rem you may not use this file except in compliance with the License.
@rem 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, software
@rem distributed under the License is distributed on an "AS IS" BASIS,
@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@rem See the License for the specific language governing permissions and
@rem limitations under the License.
@rem
@if "%DEBUG%" == "" @echo off
@rem ##########################################################################
@rem
@rem Gradle startup script for Windows
@rem
@rem ##########################################################################
@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal
set DIRNAME=%~dp0
if "%DIRNAME%" == "" set DIRNAME=.
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome
set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if "%ERRORLEVEL%" == "0" goto init
echo.
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe
if exist "%JAVA_EXE%" goto init
echo.
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:init
@rem Get command-line arguments, handling Windows variants
if not "%OS%" == "Windows_NT" goto win9xME_args
:win9xME_args
@rem Slurp the command line arguments.
set CMD_LINE_ARGS=
set _SKIP=2
:win9xME_args_slurp
if "x%~1" == "x" goto execute
set CMD_LINE_ARGS=%*
:execute
@rem Setup the command line
set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
:end
@rem End local scope for the variables with windows NT shell
if "%ERRORLEVEL%"=="0" goto mainEnd
:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
exit /b 1
:mainEnd
if "%OS%"=="Windows_NT" endlocal
:omega

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plugins {
`java-platform`
}
dependencies {
constraints {
api("org.apache.httpcomponents:fluent-hc:4.5.10")
api("org.apache.httpcomponents:httpclient:4.5.10")
runtime("commons-logging:commons-logging:1.2")
}
}

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plugins {
java
`maven-publish`
}
publishing {
publications {
register<MavenPublication>("mavenJava") {
from(components["java"])
}
}
}

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plugins {
`java-library`
}
dependencies {
api(platform(project(":httpclient-platform")))
implementation("org.apache.httpcomponents:fluent-hc")
}

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rootProject.name = "gradle-6"
include("configuration-avoidance")
include("dependency-constraints")
include("fibonacci-spi")
include("fibonacci-recursive")
include("httpclient-platform")
include("module-metadata-publishing")
include("person-rest-client")
include("widget-rest-client")

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plugins {
`java-library`
}
dependencies {
api(platform(project(":httpclient-platform")))
implementation("org.apache.httpcomponents:httpclient")
}

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<version>${spring-boot.version}</version>
<scope>test</scope>
</dependency>
<!-- CRaSH Dependency -->
<!-- CRaSH Dependency -->
<dependency>
<groupId>org.crashub</groupId>
<artifactId>crash.embed.spring</artifactId>
@ -101,16 +101,22 @@
</dependency>
<dependency>
<groupId>org.crashub</groupId>
<artifactId>crash.cli</artifactId>
<artifactId>crash.cli</artifactId>
<version>${crash.version}</version>
</dependency>
<dependency>
<groupId>org.crashub</groupId>
<artifactId>crash.connectors.telnet</artifactId>
<version>${crash.version}</version>
<exclusions>
<exclusion>
<artifactId>log4j</artifactId>
<groupId>log4j</groupId>
</exclusion>
</exclusions>
</dependency>
<!-- Groovy -->
<!-- Groovy -->
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy</artifactId>
@ -161,7 +167,7 @@
<!-- Maven plugins -->
<cargo-maven2-plugin.version>1.6.1</cargo-maven2-plugin.version>
<crash.version>1.3.2</crash.version>
<groovy.version>3.0.0-rc-3</groovy.version>