java 反射 动态调用不同类的静态方法(推荐)

package ss;public class Use {  public static Integer  demo( String s ){    System.err.println(s+"<<<<<<成功！");    Integer ss=1;    return ss;  }}

public class Ceshi {  public static void main(String[] args) {         try {        String className = "ss.Use";        Class<?> testClass = Class.forName(className);        Method saddMethod2 = testClass.getMethod("demo", new Class[]{String.class});          String result=saddMethod2.invoke(null,new Object[]{"测试反射"}).toString();          System.out.println(result);      } catch (Exception e) {        e.printStackTrace();      }}