Allow experimental Java target 21 by default

Bug: 342332820
Test: EXPERIMENTAL_TARGET_JAVA_VERSION_21=true m
Change-Id: I6cc21bf191385df91c2446b7cd6291a0e3532bea

1 files changed, 6 insertions, 0 deletions

diff --git a/java/sdk.go b/java/sdk.go
index d972c19bd..4ef4ee251 100644
--- a/java/sdk.go
+++ b/java/sdk.go
@@ -65,6 +65,12 @@ func defaultJavaLanguageVersion(ctx android.EarlyModuleContext, s android.SdkSpe
 		return JAVA_VERSION_9
 	} else if sdk.FinalOrFutureInt() <= 33 {
 		return JAVA_VERSION_11
+	} else if ctx.Config().TargetsJava21() {
+		// Temporary experimental flag to be able to try and build with
+		// java version 21 options.  The flag, if used, just sets Java
+		// 21 as the default version, leaving any components that
+		// target an older version intact.
+		return JAVA_VERSION_21
 	} else {
 		return JAVA_VERSION_17
 	}