import java.lang.reflect.*;

public class method2 {
    public int add(int a, int b) {
        return a + b;
    }

    public static void main(String args[]) {
        try {
            Class cls = Class.forName("method2");// 使用method2此類別.
            Class partypes[] = new Class[2];
            partypes[0] = Integer.TYPE;
            partypes[1] = Integer.TYPE;
            Method meth = cls.getMethod("add", partypes);// 設定使用method2的add方法,並且設定兩個參數型態皆為integer.
            method2 methobj = new method2();// 產生另一個method2類別的物件 methobj,
            Object arglist[] = new Object[2];
            arglist[0] = new Integer(37);
            arglist[1] = new Integer(47);
            Object retobj = meth.invoke(methobj, arglist);
            Integer retval = (Integer) retobj;
            System.out.println(retval.intValue());
        } catch (Throwable e) {
            System.err.println(e);
        }
    }
}