Java - Parameter annotations -


having trouble getting parameter annotations of method, below easy test demonstration, directions towards error welcome :

// annotation public @interface @ {}  // class public class annotest {     public void mytest(@at string myvar1, string myvar2){} }  // test public class app {      public static void main(string[] args) {          class myclass = annotest.class;          method method = myclass.getmethods()[0];         annotation[][] parameterannotations = method.getparameterannotations();          // should output 1 instead of 0         system.out.println(parameterannotations[0].length);     } }

you not setting implicitly setting retention runtime, way defaults @retention (retentionpolicy.class) says represent in class file not present in vm. make work add interface: @retention (retentionpolicy.runtime) class annotatio, works again ! :d

while @ it, might want set specific @target parameters , not methods/fields/classes etc.


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