import java.lang.reflect.*;


public class SinPi {

  public static void main(String[] args) {
  
    try {
      Class math = Class.forName("java.lang.Math");
      Class[] params = new Class[1];
      params[0] = Double.TYPE;
      Method sin =  math.getMethod("sin", params);
      Object[] arg_list = new Object[1];
      arg_list[0] = new Double(3.141529);
      Double d = (Double) sin.invoke(null, arg_list);
      System.out.println("The sine of Pi is " + d); 
    }
    catch (Exception e) {
      System.err.println(e);
    }
  
  }

}