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();
      }

}