Reflection in Java. How to get a method from a parameter (@Autowired) or how to get the value of a parameter from Field?

Question

Java

There is a dynamic Field

Field field = this.getClass().getDeclaredField("dict" + name + "Repository");

How to get the save method from it?

Does not work

Method saveMethod = field.getClass().getMethod("save", dict.getClass());

Answer 1

field.getClass()will return a Field class that does not have a save. The method must be looked for in the class whose type has a field, and this method must be called on the value of the field.

Example obj = new Example();

Field field = obj.getClass().getDeclaredField("dict" + name + "Repository");
SomeClass fieldValue = (SomeClass) field.get(obj);

Method method = fieldValue.getClass().getDeclaredMethod("save", dict.getClass());
Object returnValue = method.invoke(fieldValue, someArgOfTypeDict);