Merge branch 'eugenp:master' into master

core-java-modules/core-java-jar/pom.xml

@@ -54,6 +54,12 @@
             <artifactId>moneta</artifactId>
             <version>${javamoney.moneta.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-junit-jupiter</artifactId>
+            <version>${mockito.version}</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
@@ -266,6 +272,7 @@
         <!-- util -->
         <unix4j.version>0.4</unix4j.version>
         <grep4j.version>1.8.7</grep4j.version>
+        <mockito.version>4.6.1</mockito.version>
         <!-- maven plugins -->
         <javamoney.moneta.version>1.1</javamoney.moneta.version>
         <maven-javadoc-plugin.version>3.0.0-M1</maven-javadoc-plugin.version>
@@ -279,4 +286,4 @@
         <target.version>1.8</target.version>
     </properties>
 
-</project>
+</project>

core-java-modules/core-java-jar/src/main/java/com/baeldung/jarfile/JarFilePathResolver.java

@@ -0,0 +1,42 @@
+package com.baeldung.jarfile;
+
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.nio.file.Paths;
+
+public class JarFilePathResolver {
+
+    public String getJarFilePath(Class clazz) {
+        try {
+            return byGetProtectionDomain(clazz);
+        } catch (Exception e) {
+            // cannot get jar file path using byGetProtectionDomain
+            // Exception handling omitted
+        }
+        return byGetResource(clazz);
+    }
+
+    String byGetProtectionDomain(Class clazz) throws URISyntaxException {
+        URL url = clazz.getProtectionDomain().getCodeSource().getLocation();
+        return Paths.get(url.toURI()).toString();
+    }
+
+    String byGetResource(Class clazz) {
+        final URL classResource = clazz.getResource(clazz.getSimpleName() + ".class");
+        if (classResource == null) {
+            throw new RuntimeException("class resource is null");
+        }
+
+        final String url = classResource.toString();
+        if (url.startsWith("jar:file:")) {
+            // extract 'file:......jarName.jar' part from the url string
+            String path = url.replaceAll("^jar:(file:.*[.]jar)!/.*", "$1");
+            try {
+                return Paths.get(new URL(path).toURI()).toString();
+            } catch (Exception e) {
+                throw new RuntimeException("Invalid Jar File URL String");
+            }
+        }
+        throw new RuntimeException("Invalid Jar File URL String");
+    }
+}

core-java-modules/core-java-jar/src/test/java/com/baeldung/jarfile/JarFilePathResolverUnitTest.java

@@ -0,0 +1,55 @@
+package com.baeldung.jarfile;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import com.google.common.base.Ascii;
+import java.io.File;
+import java.net.URISyntaxException;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Spy;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+@ExtendWith(MockitoExtension.class)
+class JarFilePathResolverUnitTest {
+    @Spy
+    JarFilePathResolver jarFilePathResolver;
+
+    @Test
+    void givenClassObjectWhenCallingByGetProtectionDomainShouldGetExpectedPath() throws Exception {
+        String jarPath = jarFilePathResolver.byGetProtectionDomain(Ascii.class);
+        assertThat(jarPath).endsWith(".jar").contains("guava");
+        assertThat(new File(jarPath)).exists();
+    }
+
+    @Test
+    void givenClassObjectWhenCallingByGetResourceShouldGetExpectedPath() {
+        String jarPath = jarFilePathResolver.byGetResource(Ascii.class);
+        assertThat(jarPath).endsWith(".jar").contains("guava");
+        assertThat(new File(jarPath)).exists();
+    }
+
+    @Test
+    void givenClassObjectWhenNoSecurityExceptionRaisedShouldGetExpectedPath() throws URISyntaxException {
+        String jarPath = jarFilePathResolver.getJarFilePath(Ascii.class);
+        assertThat(jarPath).endsWith(".jar").contains("guava");
+        assertThat(new File(jarPath)).exists();
+        verify(jarFilePathResolver, times(1)).byGetProtectionDomain(Ascii.class);
+        verify(jarFilePathResolver, never()).byGetResource(Ascii.class);
+    }
+
+    @Test
+    void givenClassObjectWhenSecurityExceptionRaisedShouldGetExpectedPath() throws URISyntaxException {
+        when(jarFilePathResolver.byGetProtectionDomain(Ascii.class)).thenThrow(new SecurityException("not allowed"));
+        String jarPath = jarFilePathResolver.getJarFilePath(Ascii.class);
+        assertThat(jarPath).endsWith(".jar").contains("guava");
+        assertThat(new File(jarPath)).exists();
+        verify(jarFilePathResolver, times(1)).byGetProtectionDomain(Ascii.class);
+        verify(jarFilePathResolver, times(1)).byGetResource(Ascii.class);
+    }
+
+}

core-java-modules/core-java-lang-5/pom.xml

@@ -13,7 +13,6 @@
         <artifactId>core-java-modules</artifactId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
-
     <build>
         <finalName>core-java-lang-5</finalName>
         <resources>
@@ -23,5 +22,4 @@
             </resource>
         </resources>
     </build>
-
-</project>
+</project>

core-java-modules/core-java-lang-5/src/main/java/com/baeldung/imports/specific/Book.java

@@ -0,0 +1,17 @@
+package com.baeldung.imports.specific;
+
+import java.util.Date;
+import java.util.List;
+import java.util.UUID;
+
+public class Book {
+
+    private UUID id;
+
+    private String name;
+
+    private Date datePublished;
+
+    private List<String> authors;
+
+}

core-java-modules/core-java-lang-5/src/main/java/com/baeldung/imports/wildcard/Book.java

@@ -0,0 +1,15 @@
+package com.baeldung.imports.wildcard;
+
+import java.util.*;
+
+public class Book {
+
+    private UUID id;
+
+    private String name;
+
+    private Date datePublished;
+
+    private List<String> authors;
+
+}

core-java-modules/core-java-lang-5/src/main/java/com/baeldung/imports/wildcard/BookView.java

@@ -0,0 +1,17 @@
+package com.baeldung.imports.wildcard;
+
+import java.awt.*;
+import java.util.*;
+import java.util.List;
+
+public class BookView extends Frame {
+
+    private UUID id;
+
+    private String name;
+
+    private Date datePublished;
+
+    private List<String> authors;
+
+}

core-java-modules/core-java-lang-5/src/main/java/com/baeldung/imports/wildcard/Library.java

@@ -0,0 +1,19 @@
+package com.baeldung.imports.wildcard;
+
+import java.util.*;
+import java.sql.*;
+import java.sql.Date;
+
+public class Library {
+
+    private UUID id;
+
+    private String name;
+
+    private Time openingTime;
+
+    private Time closingTime;
+
+    private List<Date> datesClosed;
+
+}

core-java-modules/core-java-reflection/src/test/java/com/baeldung/reflection/PersonAndEmployeeReflectionUnitTest.java

@@ -9,7 +9,6 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.stream.Collectors;
-import java.util.stream.Stream;
 
 import static org.junit.Assert.*;
 

core-java-modules/core-java-string-apis/src/main/java/com/baeldung/clearstringbuilderorstringbuffer/BenchmarkRunner.java

@@ -0,0 +1,32 @@
+package com.baeldung.clearstringbuilderorstringbuffer;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.infra.Blackhole;
+
+public class BenchmarkRunner {
+
+    public static void main(String[] args) throws Exception {
+        org.openjdk.jmh.Main.main(args);
+    }
+
+    @State(Scope.Benchmark)
+    public static class MyState {
+        final String HELLO = "Hello World";
+        final StringBuilder sb = new StringBuilder().append(HELLO);
+    }
+
+    @Benchmark
+    public void evaluateSetLength(Blackhole blackhole, MyState state) {
+        state.sb.setLength(0);
+        blackhole.consume(state.sb.toString());
+    }
+
+    @Benchmark
+    public void evaluateDelete(Blackhole blackhole, MyState state) {
+        state.sb.delete(0, state.sb.length());
+        blackhole.consume(state.sb.toString());
+    }
+
+}

core-java-modules/core-java-string-apis/src/test/java/com/baeldung/clearstringbuilderorstringbuffer/ClearStringBuilderOrStringBufferUnitTest.java

@@ -0,0 +1,66 @@
+package com.baeldung.clearstringbuilderorstringbuffer;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class ClearStringBuilderOrStringBufferUnitTest {
+
+    @Test
+    void whenSetLengthToZero_ThenStringBuilderIsCleared() {
+        StringBuilder stringBuilder = new StringBuilder();
+        stringBuilder.append("Hello World");
+        int initialCapacity = stringBuilder.capacity();
+        stringBuilder.setLength(0);
+        assertEquals("", stringBuilder.toString());
+        assertEquals(initialCapacity, stringBuilder.capacity());
+    }
+
+    @Test
+    void whenDeleteAll_ThenStringBuilderIsCleared() {
+        StringBuilder stringBuilder = new StringBuilder();
+        stringBuilder.append("Hello World");
+        int initialCapacity = stringBuilder.capacity();
+        stringBuilder.delete(0, stringBuilder.length());
+        assertEquals("", stringBuilder.toString());
+        assertEquals(initialCapacity, stringBuilder.capacity());
+    }
+
+    @Test
+    void whenSetLengthToZero_ThenStringBufferIsCleared() {
+        StringBuffer stringBuffer = new StringBuffer();
+        stringBuffer.append("Hello World");
+        int initialCapacity = stringBuffer.capacity();
+        stringBuffer.setLength(0);
+        assertEquals("", stringBuffer.toString());
+        assertEquals(initialCapacity, stringBuffer.capacity());
+    }
+
+    @Test
+    void whenDeleteAll_ThenStringBufferIsCleared() {
+        StringBuffer stringBuffer = new StringBuffer();
+        stringBuffer.append("Hello World");
+        int initialCapacity = stringBuffer.capacity();
+        stringBuffer.delete(0, stringBuffer.length());
+        assertEquals("", stringBuffer.toString());
+        assertEquals(initialCapacity, stringBuffer.capacity());
+    }
+
+    // Note: It did not make the cut to the article, but here is another way to reset a StringBuilder
+    @Test
+    void whenAssignedToNewStringBuilder_ThenStringBuilderIsCleared() {
+        StringBuilder stringBuilder = new StringBuilder();
+        stringBuilder.append("Hello World");
+        stringBuilder = new StringBuilder();
+        assertEquals("", stringBuilder.toString());
+    }
+
+    @Test
+    void whenAssignedToNewStringBuffer_ThenStringBufferIsCleared() {
+        StringBuffer stringBuffer = new StringBuffer();
+        stringBuffer.append("Hello World");
+        stringBuffer = new StringBuffer();
+        assertEquals("", stringBuffer.toString());
+    }
+
+}

pom.xml

@@ -259,7 +259,7 @@
                                         </goals>
                                     </pluginExecutionFilter>
                                     <action>
-                                        <ignore></ignore>
+                                        <ignore/>
                                     </action>
                                 </pluginExecution>
                                 <pluginExecution>
@@ -278,7 +278,7 @@
                                         </goals>
                                     </pluginExecutionFilter>
                                     <action>
-                                        <ignore></ignore>
+                                        <ignore/>
                                     </action>
                                 </pluginExecution>
                             </pluginExecutions>
@@ -621,7 +621,6 @@
                 <module>spring-katharsis</module>
 
                 <module>spring-mobile</module>
-                <module>spring-mockito</module>
                 <module>spring-native</module>
                 <module>spring-protobuf</module>
                 <module>spring-quartz</module>
@@ -1050,7 +1049,6 @@
                 <module>spring-katharsis</module>
 
                 <module>spring-mobile</module>
-                <module>spring-mockito</module>
                 <module>spring-native</module>
                 <module>spring-protobuf</module>
                 <module>spring-quartz</module>
@@ -1364,7 +1362,7 @@
 
         <!-- logging -->
         <org.slf4j.version>1.7.32</org.slf4j.version>
-        <logback.version>1.2.6</logback.version>
+        <logback.version>1.2.7</logback.version>
 
         <!-- plugins -->
         <maven-surefire-plugin.version>2.22.2</maven-surefire-plugin.version>

testing-modules/pom.xml

@@ -39,6 +39,7 @@
         <module>rest-assured</module>
         <module>rest-testing</module>
         <module>selenium-junit-testng</module>
+        <module>spring-mockito</module>
         <module>spring-testing-2</module>
         <module>spring-testing</module>
         <module>test-containers</module>

testing-modules/spring-mockito/pom.xml

@@ -13,7 +13,7 @@
         <groupId>com.baeldung</groupId>
         <artifactId>parent-boot-2</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../parent-boot-2</relativePath>
+        <relativePath>../../parent-boot-2</relativePath>
     </parent>
 
     <dependencies>