```java
//使用反射
import java.lang.reflect.Method;

public class ReflectiveHello {
    public static void main(String[] args) throws Exception {
        Method method = System.class.getMethod("out");
        Object out = method.invoke(null);
        Method println = out.getClass().getMethod("println", String.class);
        println.invoke(out, "Hello, World!");
    }
}
```