AttributeTest should be prepared for more JDK versions

testplugins/org.eclipse.objectteams.otdt.tests/compiler/org/eclipse/objectteams/otdt/tests/compiler/AttributesTest.java

diff --git a/testplugins/org.eclipse.objectteams.otdt.tests/compiler/org/eclipse/objectteams/otdt/tests/compiler/AttributesTest.java b/testplugins/org.eclipse.objectteams.otdt.tests/compiler/org/eclipse/objectteams/otdt/tests/compiler/AttributesTest.java
index 50a4c2c..6810422 100644
--- a/testplugins/org.eclipse.objectteams.otdt.tests/compiler/org/eclipse/objectteams/otdt/tests/compiler/AttributesTest.java
+++ b/testplugins/org.eclipse.objectteams.otdt.tests/compiler/org/eclipse/objectteams/otdt/tests/compiler/AttributesTest.java
@@ -64,6 +64,10 @@
 			this.versionString = "version 16 : 60.0";
 		} else if (this.complianceLevel == ClassFileConstants.JDK17) {
 			this.versionString = "version 17 : 61.0";
+		} else if (this.complianceLevel == ClassFileConstants.JDK18) {
+			this.versionString = "version 18 : 62.0";
+		} else if (this.complianceLevel == ClassFileConstants.JDK19) {
+			this.versionString = "version 19 : 63.0";
 		}
 	}