Stack Overflow http://stackoverflow.com/q/34560790/2587435

AnnotationsTest.java

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.AnnotatedParameterizedType;
import java.lang.reflect.AnnotatedType;
import java.lang.reflect.AnnotatedTypeVariable;
import java.lang.reflect.Executable;
import java.lang.reflect.Method;
import java.lang.reflect.Parameter;
import java.util.Arrays;

public class AnnotationsTest {
    
    @Retention(RetentionPolicy.RUNTIME)
    @Target({ElementType.TYPE_USE})
    public static @interface Bar {
        int value() default 1;
    }
    
    public static class Foo<T> {
        public void foo(Foo<@Bar T> t) {}
    }
    
    public static void main(String[] args) throws Exception {
        
        Method method = Foo.class.getDeclaredMethod("foo", Foo.class);
        Parameter[] ps = method.getParameters();
        Executable executable = ps[0].getDeclaringExecutable();
        
        AnnotatedParameterizedType type
                = (AnnotatedParameterizedType)executable.getAnnotatedParameterTypes()[0];
        print(type.getType(), "AnnotationsTest$Foo<T>");
        
        AnnotatedTypeVariable typeVar
                = (AnnotatedTypeVariable)type.getAnnotatedActualTypeArguments()[0];
        print(typeVar.getType(), "T");
        print(Arrays.toString(typeVar.getAnnotations()), "[@Bar (maybe.. maybe not)]");
        print(Arrays.toString(typeVar.getDeclaredAnnotations()), "[@Bar (maybe.. maybe not)]");

        AnnotatedType[] types = typeVar.getAnnotatedBounds();
        print(Arrays.toString(types[0].getAnnotations()), "[@Bar (maybe.. maybe not)]");
        print(Arrays.toString(types[0].getDeclaredAnnotations()), "[@Bar (maybe.. maybe not)]");
    }
    
    private static void print(Object actual, String expected) {
        final String format = "actual: %s; expected: %s";
        System.out.println(String.format(format, actual.toString(), expected));
    }
}