创建一个方法，该方法创建它自己的类的对象

public class ObjectCreator {
    public static Object createObject() {
        String className = Thread.currentThread().getStackTrace()[2].getClassName();
        try {
            Class<?> objClass = Class.forName(className);
            return objClass.newInstance();
        } catch (ClassNotFoundException | IllegalAccessException | InstantiationException e) {
            e.printStackTrace();
        }
        return null;
    }
}

public class MyClass {
    public static void main(String[] args) {
        MyClass obj = (MyClass) ObjectCreator.createObject();
        System.out.println(obj.getClass().getName()); // 输出 "MyClass"
    }
}