Add JavaVersion for Java 18 since a release candidate is available.

src/changes/changes.xml

@@ -119,6 +119,7 @@ The <action> type attribute can be add,update,fix,remove.
     <action                   type="add" dev="ggregory" due-to="Gary Gregory">Add Processor.Type.AARCH_64.</action>
     <action                   type="add" dev="ggregory" due-to="Gary Gregory">Add Processor.isAarch64().</action>
     <action                   type="add" dev="ggregory" due-to="Gary Gregory">Update ArchUtils.getProcessor(String) for "aarch64".</action>
+    <action                   type="add" dev="ggregory" due-to="Gary Gregory">Add JavaVersion.JAVA_18.</action>
     <!-- UPDATE -->
     <action                   type="update" dev="ggregory" due-to="Dependabot, Gary Gregory">Bump spotbugs-maven-plugin from 4.2.0 to 4.5.0.0 #735, #808, #822, #834.</action>
     <action                   type="update" dev="ggregory" due-to="Dependabot, XenoAmess">Bump actions/cache from v2.1.4 to v2.1.7 #742, #752, #764, #833.</action>

src/main/java/org/apache/commons/lang3/JavaVersion.java

@@ -143,6 +143,13 @@ public enum JavaVersion {
      */
     JAVA_17(17.0f, "17"),
 
+    /**
+     * Java 18.
+     *
+     * @since 3.13.0
+     */
+    JAVA_18(18.0f, "18"),
+
     /**
      * The most recent java version. Mainly introduced to avoid to break when a new version of Java is used.
      */
@@ -260,6 +267,8 @@ public enum JavaVersion {
             return JAVA_16;
         case "17":
             return JAVA_17;
+        case "18":
+            return JAVA_18;
         default:
             final float v = toFloatVersion(versionStr);
             if ((v - 1.) < 1.) { // then we need to check decimals > .9

src/test/java/org/apache/commons/lang3/JavaVersionTest.java

@@ -27,6 +27,7 @@ import static org.apache.commons.lang3.JavaVersion.JAVA_14;
 import static org.apache.commons.lang3.JavaVersion.JAVA_15;
 import static org.apache.commons.lang3.JavaVersion.JAVA_16;
 import static org.apache.commons.lang3.JavaVersion.JAVA_17;
+import static org.apache.commons.lang3.JavaVersion.JAVA_18;
 import static org.apache.commons.lang3.JavaVersion.JAVA_1_1;
 import static org.apache.commons.lang3.JavaVersion.JAVA_1_2;
 import static org.apache.commons.lang3.JavaVersion.JAVA_1_3;
@@ -70,10 +71,11 @@ public class JavaVersionTest {
         assertEquals(JAVA_15, get("15"), "15 failed");
         assertEquals(JAVA_16, get("16"), "16 failed");
         assertEquals(JAVA_17, get("17"), "17 failed");
+        assertEquals(JAVA_18, get("18"), "18 failed");
         assertEquals(JAVA_RECENT, get("1.10"), "1.10 failed");
         // assertNull("2.10 unexpectedly worked", get("2.10"));
         assertEquals(get("1.5"), getJavaVersion("1.5"), "Wrapper method failed");
-        assertEquals(JAVA_RECENT, get("18"), "Unhandled"); // LANG-1384
+        assertEquals(JAVA_RECENT, get("19"), "Unhandled"); // LANG-1384
     }
 
     @Test