如何实现非泛型接口并使用泛型调用

public interface MyInterface {
    void doSomething();
}

public class MyClass implements MyInterface {
    @Override
    public void doSomething() {
        System.out.println("Doing something...");
    }
}

public <T extends MyInterface> void invokeGenericMethod(T obj) {
    obj.doSomething();
}

MyClass myClass = new MyClass();
invokeGenericMethod(myClass);