Add Java 17 to JavaVersion enum

See gh-26769

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/system/JavaVersion.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 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.
@@ -16,6 +16,7 @@
 
 package org.springframework.boot.system;
 
+import java.io.Console;
 import java.lang.invoke.MethodHandles;
 import java.util.Arrays;
 import java.util.Collections;
@@ -77,7 +78,12 @@ public enum JavaVersion {
 	/**
 	 * Java 16.
 	 */
-	SIXTEEN("16", Stream.class, "toList");
+	SIXTEEN("16", Stream.class, "toList"),
+
+	/**
+	 * Java 17.
+	 */
+	SEVENTEEN("17", Console.class, "charset");
 
 	private final String name;
 

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/system/JavaVersionTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 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.
@@ -133,4 +133,10 @@ class JavaVersionTests {
 		assertThat(JavaVersion.getJavaVersion()).isEqualTo(JavaVersion.SIXTEEN);
 	}
 
+	@Test
+	@EnabledOnJre(JRE.JAVA_17)
+	void currentJavaVersionSeventeen() {
+		assertThat(JavaVersion.getJavaVersion()).isEqualTo(JavaVersion.SEVENTEEN);
+	}
+
 }