BAEL-5015: Add Java 9 example for readAllBytes (#10999)

Co-authored-by: Krzysztof Woyke <krzysztof.woyke.sp@lhsystems.com>

core-java-modules/core-java-io-conversions-2/pom.xml

@@ -36,6 +36,16 @@
 
     <build>
         <finalName>core-java-io-conversions-2</finalName>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>${source.version}</source>
+                    <target>${target.version}</target>
+                </configuration>
+            </plugin>
+        </plugins>
         <resources>
             <resource>
                 <directory>src/main/resources</directory>
@@ -45,6 +55,8 @@
     </build>
 
     <properties>
+        <source.version>11</source.version>
+        <target.version>11</target.version>
         <json.version>20200518</json.version>
         <opencsv.version>4.1</opencsv.version>
     </properties>

core-java-modules/core-java-io-conversions-2/src/test/java/com/baeldung/inputstreamtostring/JavaInputStreamToXUnitTest.java

@@ -70,6 +70,16 @@ public class JavaInputStreamToXUnitTest {
         assertThat(text, equalTo(originalString));
     }
 
+    @Test
+    public void givenUsingJava9_whenConvertingAnInputStreamToAString_thenCorrect() throws IOException {
+        final String originalString = randomAlphabetic(DEFAULT_SIZE);
+        final InputStream inputStream = new ByteArrayInputStream(originalString.getBytes());
+
+        final String text = new String(inputStream.readAllBytes(), StandardCharsets.UTF_8);
+
+        assertThat(text, equalTo(originalString));
+    }
+
     @Test
     public final void givenUsingJava7_whenConvertingAnInputStreamToAString_thenCorrect() throws IOException {
         final String originalString = randomAlphabetic(DEFAULT_SIZE);

core-java-modules/pom.xml

@@ -63,7 +63,6 @@
         <module>core-java-io-4</module>
         <module>core-java-io-apis</module>
         <module>core-java-io-conversions</module>
-        <module>core-java-io-conversions-2</module>
         <module>core-java-jar</module>
         <module>core-java-jndi</module>
         <module>core-java-jvm</module>

pom.xml

@@ -1292,6 +1292,7 @@
                  <module>core-java-modules/core-java-date-operations-1</module>
                  <module>core-java-modules/core-java-datetime-conversion</module>
                  <module>core-java-modules/core-java-datetime-string</module>
+                 <module>core-java-modules/core-java-io-conversions-2</module>
                  <module>core-java-modules/core-java-jpms</module>
                  <module>core-java-modules/core-java-os</module>
                  <module>core-java-modules/core-java-string-operations-3</module>
@@ -1338,6 +1339,7 @@
                 <module>core-java-modules/core-java-date-operations-1</module>
                 <module>core-java-modules/core-java-datetime-conversion</module>
                 <module>core-java-modules/core-java-datetime-string</module>
+                <module>core-java-modules/core-java-io-conversions-2</module>
                 <module>core-java-modules/core-java-jpms</module>
                 <module>core-java-modules/core-java-os</module>
                 <module>core-java-modules/core-java-string-operations-3</module>