如何在项目中搜索返回Collection接口实现的所有方法？

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

public class CollectionMethodFinder {

    public static void main(String[] args) {
        List<Method> methods = findCollectionMethods(Collection.class);
        for (Method method : methods) {
            System.out.println(method.getName());
        }
    }

    public static List<Method> findCollectionMethods(Class<?> clazz) {
        List<Method> methods = new ArrayList<>();
        for (Method method : clazz.getDeclaredMethods()) {
            if (method.getReturnType().equals(Collection.class)) {
                methods.add(method);
            }
        }
        return methods;
    }
}