java 反射操作无参构造方法

package cn.com.chapter1.technolgy;
/**
 * java 反射操作无参构造方法
 */
import java.lang.reflect.Method;


public class TestDemo2 {


public static void main(String[] args)throws Exception{
Class<?> cls=Class.forName("cn.com.chapter1.technolgy.Book3");
   Object obj=cls.newInstance();
   String s1="title";
   String s2="price";
   Method setMethodTitle=cls.getMethod("set"+initCap(s1), String.class);
   Method setMethodPrice=cls.getMethod("set"+initCap(s2), double.class);
   Method getMethodTitle=cls.getMethod("get"+initCap(s1));
   Method getMethodPrice=cls.getMethod("get"+initCap(s2));
   setMethodTitle.invoke(obj, "反射操作方法");
   setMethodPrice.invoke(obj, 98);
   System.out.println(getMethodTitle.invoke(obj));
   System.out.println(getMethodPrice.invoke(obj));
}
 public static String initCap(String str)
 {
return str.substring(0,1).toUpperCase()+str.substring(1);
 }
}
class Book3
{
private String title;
private double price;
public String getTitle() {
return title;
}


public void setTitle(String title) {
this.title = title;
}


public double getPrice() {
return price;
}


public void setPrice(double price) {
this.price = price;
}


public String toString()
{
return "title="+this.title+",price="+this.price;
}
}