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

This commit is contained in:
Karsten Silz
2020-08-26 21:28:20 +01:00
436 changed files with 2196 additions and 403 deletions
+2
View File
@@ -3,6 +3,7 @@
This module contains articles about searching algorithms.
### Relevant articles:
- [Binary Search Algorithm in Java](https://www.baeldung.com/java-binary-search)
- [Depth First Search in Java](https://www.baeldung.com/java-depth-first-search)
- [Interpolation Search in Java](https://www.baeldung.com/java-interpolation-search)
@@ -11,3 +12,4 @@ This module contains articles about searching algorithms.
- [Monte Carlo Tree Search for Tic-Tac-Toe Game](https://www.baeldung.com/java-monte-carlo-tree-search)
- [Range Search Algorithm in Java](https://www.baeldung.com/java-range-search)
- [Fast Pattern Matching of Strings Using Suffix Tree](https://www.baeldung.com/java-pattern-matching-suffix-tree)
- [Find the Kth Smallest Element in Two Sorted Arrays](https://www.baeldung.com/java-kth-smallest-element-in-sorted-arrays)
+2
View File
@@ -3,9 +3,11 @@
This module contains articles about Apache POI
### Relevant Articles:
- [Microsoft Word Processing in Java with Apache POI](https://www.baeldung.com/java-microsoft-word-with-apache-poi)
- [Working with Microsoft Excel in Java](https://www.baeldung.com/java-microsoft-excel)
- [Creating a MS PowerPoint Presentation in Java](https://www.baeldung.com/apache-poi-slideshow)
- [Merge Cells in Excel Using Apache POI](https://www.baeldung.com/java-apache-poi-merge-cells)
- [Get String Value of Excel Cell with Apache POI](https://www.baeldung.com/java-apache-poi-cell-string-value)
- [Read Excel Cell Value Rather Than Formula With Apache POI](https://www.baeldung.com/apache-poi-read-cell-value-formula)
- [Setting Formulas in Excel with Apache POI](https://www.baeldung.com/java-apache-poi-set-formulas)
+10 -17
View File
@@ -1,8 +1,8 @@
<?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">
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>cdi</artifactId>
<version>1.0-SNAPSHOT</version>
@@ -10,9 +10,9 @@
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-spring-4</artifactId>
<artifactId>parent-spring-5</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../parent-spring-4</relativePath>
<relativePath>../parent-spring-5</relativePath>
</parent>
<dependencies>
@@ -26,28 +26,22 @@
<artifactId>weld-se-core</artifactId>
<version>${weld-se-core.version}</version>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest</artifactId>
<version>${hamcrest.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${assertj-core.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>${aspectjweaver.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
@@ -61,7 +55,6 @@
<weld-se-core.version>3.0.5.Final</weld-se-core.version>
<aspectjweaver.version>1.9.2</aspectjweaver.version>
<assertj-core.version>3.10.0</assertj-core.version>
<spring.version>5.1.2.RELEASE</spring.version>
</properties>
</project>
+1
View File
@@ -9,3 +9,4 @@ This module contains articles about Java 10 core features
- [Copy a List to Another List in Java](http://www.baeldung.com/java-copy-list-to-another)
- [Deep Dive Into the New Java JIT Compiler – Graal](https://www.baeldung.com/graal-java-jit-compiler)
- [Copying Sets in Java](https://www.baeldung.com/java-copy-sets)
- [Converting between a List and a Set in Java](https://www.baeldung.com/convert-list-to-set-and-set-to-list)
+16 -8
View File
@@ -1,22 +1,29 @@
<?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">
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>core-java-10</artifactId>
<version>0.1.0-SNAPSHOT</version>
<name>core-java-10</name>
<packaging>jar</packaging>
<url>http://maven.apache.org</url>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
<relativePath>../../</relativePath>
<groupId>com.baeldung.core-java-modules</groupId>
<artifactId>core-java-modules</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../</relativePath>
</parent>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>${commons-collections4.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
@@ -34,6 +41,7 @@
<properties>
<maven.compiler.source.version>10</maven.compiler.source.version>
<maven.compiler.target.version>10</maven.compiler.target.version>
<commons-collections4.version>4.1</commons-collections4.version>
</properties>
</project>
@@ -0,0 +1,68 @@
package com.baeldung.java10.collections.conversion;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
import org.apache.commons.collections4.CollectionUtils;
import org.junit.Test;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
public class ListSetConversionUnitTest {
// Set -> List; List -> Set
@Test
public final void givenUsingCoreJava_whenSetConvertedToList_thenCorrect() {
final Set<Integer> sourceSet = Sets.newHashSet(0, 1, 2, 3, 4, 5);
final List<Integer> targetList = new ArrayList<>(sourceSet);
}
@Test
public final void givenUsingCoreJava_whenListConvertedToSet_thenCorrect() {
final List<Integer> sourceList = Lists.newArrayList(0, 1, 2, 3, 4, 5);
final Set<Integer> targetSet = new HashSet<>(sourceList);
}
@Test
public void givenUsingJava10_whenSetConvertedToList_thenCorrect() {
final Set<Integer> sourceSet = Sets.newHashSet(0, 1, 2, 3, 4, 5);
final List<Integer> targetList = List.copyOf(sourceSet);
}
@Test
public void givenUsingJava10_whenListConvertedToSet_thenCorrect() {
final List<Integer> sourceList = Lists.newArrayList(0, 1, 2, 3, 4, 5);
final Set<Integer> targetSet = Set.copyOf(sourceList);
}
@Test
public final void givenUsingGuava_whenSetConvertedToList_thenCorrect() {
final Set<Integer> sourceSet = Sets.newHashSet(0, 1, 2, 3, 4, 5);
final List<Integer> targetList = Lists.newArrayList(sourceSet);
}
@Test
public final void givenUsingGuava_whenListConvertedToSet_thenCorrect() {
final List<Integer> sourceList = Lists.newArrayList(0, 1, 2, 3, 4, 5);
final Set<Integer> targetSet = Sets.newHashSet(sourceList);
}
@Test
public final void givenUsingCommonsCollections_whenListConvertedToSet_thenCorrect() {
final List<Integer> sourceList = Lists.newArrayList(0, 1, 2, 3, 4, 5);
final Set<Integer> targetSet = new HashSet<>(6);
CollectionUtils.addAll(targetSet, sourceList);
}
@Test
public final void givenUsingCommonsCollections_whenSetConvertedToList_thenCorrect() {
final Set<Integer> sourceSet = Sets.newHashSet(0, 1, 2, 3, 4, 5);
final List<Integer> targetList = new ArrayList<>(6);
CollectionUtils.addAll(targetList, sourceSet);
}
}
@@ -31,6 +31,6 @@ public class UseDateTimeFormatterUnitTest {
public void givenALocalDate_whenFormattingWithStyleAndLocale_thenPass() {
String result = subject.formatWithStyleAndLocale(localDateTime, FormatStyle.MEDIUM, Locale.UK);
assertThat(result).isEqualTo("25 Jan 2015, 06:30:00");
assertThat(result).isEqualTo("25-Jan-2015 06:30:00");
}
}
@@ -3,6 +3,7 @@ package com.baeldung.datetime;
import static org.assertj.core.api.Assertions.assertThat;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
@@ -24,10 +25,11 @@ public class UseToInstantUnitTest {
@Test
public void givenADate_whenConvertingToLocalDate_thenAsExpected() {
Date givenDate = new Date(1465817690000L);
LocalDateTime currentDateTime = LocalDateTime.now();
Date givenDate = Date.from(currentDateTime.atZone(ZoneId.systemDefault()).toInstant());
LocalDateTime localDateTime = subject.convertDateToLocalDate(givenDate);
assertThat(localDateTime).isEqualTo("2016-06-13T13:34:50");
assertThat(localDateTime).isEqualTo(currentDateTime);
}
}
@@ -54,7 +54,7 @@ public class UseZonedDateTimeUnitTest {
@Test
public void givenAStringWithTimeZone_whenParsing_thenEqualsExpected() {
ZonedDateTime resultFromString = zonedDateTime.getZonedDateTimeUsingParseMethod("2015-05-03T10:15:30+01:00[Europe/Paris]");
ZonedDateTime resultFromLocalDateTime = ZonedDateTime.of(2015, 5, 3, 11, 15, 30, 0, ZoneId.of("Europe/Paris"));
ZonedDateTime resultFromLocalDateTime = ZonedDateTime.of(2015, 5, 3, 10, 15, 30, 0, ZoneId.of("Europe/Paris"));
assertThat(resultFromString.getZone()).isEqualTo(ZoneId.of("Europe/Paris"));
assertThat(resultFromLocalDateTime.getZone()).isEqualTo(ZoneId.of("Europe/Paris"));
@@ -3,7 +3,9 @@
This module contains articles about advanced operations on arrays in Java. They assume some background knowledge with arrays in Java.
### Relevant Articles:
- [How to Copy an Array in Java](https://www.baeldung.com/java-array-copy)
- [Arrays.deepEquals](https://www.baeldung.com/java-arrays-deepequals)
- [Find Sum and Average in a Java Array](https://www.baeldung.com/java-array-sum-average)
- [Intersection Between two Integer Arrays](https://www.baeldung.com/java-array-intersection)
- [Comparing Arrays in Java](https://www.baeldung.com/java-comparing-arrays)
@@ -12,3 +12,4 @@
- [Fail-Safe Iterator vs Fail-Fast Iterator](https://www.baeldung.com/java-fail-safe-vs-fail-fast-iterator)
- [Quick Guide to the Java Stack](https://www.baeldung.com/java-stack)
- [Convert an Array of Primitives to a List](https://www.baeldung.com/java-primitive-array-to-list)
- [A Guide to BitSet in Java](https://www.baeldung.com/java-bitset)
@@ -10,4 +10,5 @@ This module contains articles about the Java List collection
- [Performance Comparison of Primitive Lists in Java](https://www.baeldung.com/java-list-primitive-performance)
- [Filtering a Java Collection by a List](https://www.baeldung.com/java-filter-collection-by-list)
- [How to Count Duplicate Elements in Arraylist](https://www.baeldung.com/java-count-duplicate-elements-arraylist)
- [Finding the Differences Between Two Lists in Java](https://www.baeldung.com/java-lists-difference)
- [[<-- Prev]](/core-java-modules/core-java-collections-list-2)
@@ -1,5 +1,8 @@
#Core Java Console
[Read and Write User Input in Java](http://www.baeldung.com/java-console-input-output)
[Formatting with printf() in Java](https://www.baeldung.com/java-printstream-printf)
[ASCII Art in Java](http://www.baeldung.com/ascii-art-in-java)
### Relevant Articles:
- [Read and Write User Input in Java](http://www.baeldung.com/java-console-input-output)
- [Formatting with printf() in Java](https://www.baeldung.com/java-printstream-printf)
- [ASCII Art in Java](http://www.baeldung.com/ascii-art-in-java)
- [System.console() vs. System.out](https://www.baeldung.com/java-system-console-vs-system-out)
@@ -0,0 +1,3 @@
### Relevant Articles:
- [NoSuchMethodError in Java](https://www.baeldung.com/java-nosuchmethod-error)
@@ -0,0 +1,33 @@
<?xml version="1.0" encoding="UTF-8"?>
<project
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung.exceptions</groupId>
<artifactId>core-java-exceptions-3</artifactId>
<version>0.1.0-SNAPSHOT</version>
<name>core-java-exceptions-3</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>
<artifactId>core-java-modules</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../</relativePath>
</parent>
<dependencies>
<!-- test scoped -->
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${assertj-core.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<properties>
<!-- testing -->
<assertj-core.version>3.10.0</assertj-core.version>
</properties>
</project>
@@ -0,0 +1,11 @@
package com.baeldung.exceptions.nosuchmethoderror;
public class MainMenu {
public static void main(String[] args) {
System.out.println("Today's Specials: " + getSpecials());
}
public static String getSpecials() {
return SpecialToday.getDesert();
}
}
@@ -0,0 +1,8 @@
package com.baeldung.exceptions.nosuchmethoderror;
public class SpecialToday {
private static String desert = "Chocolate Cake";
public static String getDesert() {
return desert;
}
}
@@ -0,0 +1,17 @@
package com.baeldung.nullmethodparameter;
public class NullParameterExample {
public void processSomethingNotNull(Object myParameter) {
if (myParameter == null) {
throw new IllegalArgumentException("Parameter 'myParameter' cannot be null");
}
//Do something with the parameter
}
public void processSomethingElseNotNull(Object myParameter) {
if (myParameter == null) {
throw new NullPointerException("Parameter 'myParameter' cannot be null");
}
//Do something with the parameter
}
}
@@ -0,0 +1,13 @@
package com.baeldung.exceptions.nosuchmethoderror;
import static org.junit.Assert.assertNotNull;
import org.junit.jupiter.api.Test;
class MainMenuUnitTest {
@Test
void whenGetSpecials_thenNotNull() {
assertNotNull(MainMenu.getSpecials());
}
}
@@ -0,0 +1,17 @@
package com.baeldung.nullmethodparameter;
import org.junit.Test;
public class NullParameterExampleUnitTest {
@Test(expected = IllegalArgumentException.class)
public void givenNullParameter_whenProcessSomethingNotNull_thenIllegalArgumentException() {
NullParameterExample example = new NullParameterExample();
example.processSomethingNotNull(null);
}
@Test(expected = NullPointerException.class)
public void givenNullParameter_whenProcessSomethingElseNotNull_thenNullPointerException() {
NullParameterExample example = new NullParameterExample();
example.processSomethingElseNotNull(null);
}
}
@@ -6,4 +6,7 @@ This module contains articles about core Java input and output (IO)
- [Java – Create a File](https://www.baeldung.com/java-how-to-create-a-file)
- [Check If a Directory Is Empty in Java](https://www.baeldung.com/java-check-empty-directory)
- [Check If a File or Directory Exists in Java](https://www.baeldung.com/java-file-directory-exists)
- [Copy a Directory in Java](https://www.baeldung.com/java-copy-directory)
- [Java Files Open Options](https://www.baeldung.com/java-file-options)
- [[<-- Prev]](/core-java-modules/core-java-io-2)
@@ -0,0 +1,82 @@
package com.baeldung.linenumber;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.junit.Test;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.List;
import java.util.Scanner;
import java.util.stream.Stream;
import static org.junit.Assert.assertEquals;
public class LineAtGivenNumberUnitTest {
private static final String FILE_PATH = "src/test/resources/linesInput.txt";
@Test
public void givenFile_whenUsingBufferedReader_thenExtractedLineIsCorrect() throws IOException {
try (BufferedReader br = Files.newBufferedReader(Paths.get(FILE_PATH))) {
for (int i = 0; i < 3; i++) {
br.readLine();
}
String extractedLine = br.readLine();
assertEquals("Line 4", extractedLine);
}
}
@Test
public void givenFile_whenUsingScanner_thenExtractedLineIsCorrect() throws IOException {
try (Scanner scanner = new Scanner(new File(FILE_PATH))) {
for (int i = 0; i < 3; i++) {
scanner.nextLine();
}
String extractedLine = scanner.nextLine();
assertEquals("Line 4", extractedLine);
}
}
@Test
public void givenSmallFile_whenUsingFilesAPI_thenExtractedLineIsCorrect() throws IOException {
String extractedLine = Files.readAllLines(Paths.get(FILE_PATH)).get(4);
assertEquals("Line 5", extractedLine);
}
@Test
public void givenLargeFile_whenUsingFilesAPI_thenExtractedLineIsCorrect() throws IOException {
try (Stream<String> lines = Files.lines(Paths.get(FILE_PATH))) {
String extractedLine = lines.skip(4).findFirst().get();
assertEquals("Line 5", extractedLine);
}
}
@Test
public void givenFile_whenUsingFileUtils_thenExtractedLineIsCorrect() throws IOException {
ClassLoader classLoader = getClass().getClassLoader();
File file = new File(classLoader.getResource("linesInput.txt").getFile());
List<String> lines = FileUtils.readLines(file, "UTF-8");
String extractedLine = lines.get(0);
assertEquals("Line 1", extractedLine);
}
@Test
public void givenFile_whenUsingIOUtils_thenExtractedLineIsCorrect() throws IOException {
String fileContent = IOUtils.toString(new FileInputStream(FILE_PATH), StandardCharsets.UTF_8);
String extractedLine = fileContent.split(System.lineSeparator())[0];
assertEquals("Line 1", extractedLine);
}
}
@@ -0,0 +1,5 @@
Line 1
Line 2
Line 3
Line 4
Line 5
@@ -10,4 +10,5 @@ This module contains articles about working with the Java Virtual Machine (JVM).
- [boolean and boolean[] Memory Layout in the JVM](https://www.baeldung.com/jvm-boolean-memory-layout)
- [Where Is the Array Length Stored in JVM?](https://www.baeldung.com/java-jvm-array-length)
- [Memory Address of Objects in Java](https://www.baeldung.com/java-object-memory-address)
- [List All Classes Loaded in a Specific Class Loader](https://www.baeldung.com/java-list-classes-class-loader)
- More articles: [[<-- prev]](/core-java-modules/core-java-jvm)
@@ -0,0 +1,19 @@
package com.baeldung.loadedclasslisting;
import java.util.Arrays;
public class Launcher {
public static void main(String[] args) {
printClassesLoadedBy("BOOTSTRAP");
printClassesLoadedBy("SYSTEM");
printClassesLoadedBy("EXTENSION");
}
private static void printClassesLoadedBy(String classLoaderType) {
System.out.println(classLoaderType + " ClassLoader : ");
Class<?>[] classes = ListLoadedClassesAgent.listLoadedClasses(classLoaderType);
Arrays.asList(classes)
.forEach(clazz -> System.out.println(clazz.getCanonicalName()));
}
}
@@ -0,0 +1,40 @@
package com.baeldung.loadedclasslisting;
import java.lang.instrument.Instrumentation;
public class ListLoadedClassesAgent {
private static Instrumentation instrumentation;
public static void premain(String agentArgs, Instrumentation instrumentation) {
ListLoadedClassesAgent.instrumentation = instrumentation;
}
public static Class<?>[] listLoadedClasses(String classLoaderType) {
if (instrumentation == null) {
throw new IllegalStateException(
"ListLoadedClassesAgent is not initialized.");
}
return instrumentation.getInitiatedClasses(
getClassLoader(classLoaderType));
}
private static ClassLoader getClassLoader(String classLoaderType) {
ClassLoader classLoader = null;
switch (classLoaderType) {
case "SYSTEM":
classLoader = ClassLoader.getSystemClassLoader();
break;
case "EXTENSION":
classLoader = ClassLoader.getSystemClassLoader().getParent();
break;
// passing a null value to the Instrumentation : getInitiatedClasses method
// defaults to the bootstrap class loader
case "BOOTSTRAP":
break;
default:
break;
}
return classLoader;
}
}
@@ -0,0 +1 @@
Premain-Class: com.baeldung.loadedclasslisting.ListLoadedClassesAgent
@@ -6,8 +6,11 @@ public interface Bar {
String method(String string);
default String defaultMethod() {
return "String from Bar";
default String defaultBar() {
return "Default String from Bar";
}
default String defaultCommon() {
return "Default Common from Bar";
}
}
@@ -6,7 +6,11 @@ public interface Baz {
String method(String string);
default String defaultMethod() {
return "String from Baz";
default String defaultBaz() {
return "Default String from Baz";
}
default String defaultCommon(){
return "Default Common from Baz";
}
}
@@ -5,8 +5,7 @@ package com.baeldung.java8.lambda.tips;
public interface FooExtended extends Baz, Bar {
@Override
default String defaultMethod() {
return Bar.super.defaultMethod();
default String defaultCommon() {
return Bar.super.defaultCommon();
}
}

Some files were not shown because too many files have changed in this diff Show More