The following file does not compile in 7:

import java.lang.annotation.*;
@Retention(RetentionPolicy.RUNTIME)
@interface T {
    strictfp float ff() default -1.0f;
}


$ javac T.java
T.java:4: error: modifier strictfp not allowed here
    strictfp float ff() default -1.0f;
                   ^
1 error

In 8 it compiles.

JLS for 7 is actually slightly inconsistent here the grammar in the 9.6.1 says AbstractMethodModifier but the grammar in chapter 18 says modifier.