通过反射创建文件

wyh要好好学习

于 2022-12-19 14:05:08 发布

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文章标签： java jvm 前端

本文链接：https://blog.youkuaiyun.com/wyh2943455568/article/details/128371895

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public class homework2 {
    public static void main(String[] args) throws ClassNotFoundException, IllegalAccessException, InstantiationException, NoSuchMethodException, InvocationTargetException {
        Class<?> cls = Class.forName("java.io.File");
        Constructor<?>[] constructors = cls.getConstructors();
        //遍历输出所有构造器
        for (Constructor<?> constructor : constructors) {
            System.out.println(constructor);
        }
        //通过构造器生成文件
        Constructor<?> constructor = cls.getConstructor(String.class);
        String filePath = "d:\\text.txt";
        Object o1 = constructor.newInstance(filePath);
        Method createNewFile = cls.getMethod("createNewFile");
        createNewFile.invoke(o1);
    }
}