java reflect反射机制的简单例子

今天碰到一个关于反射的例子，写出一个简单的测试代码，作为记录。

package reflect;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

public class MainClass {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		try {
			//反射获得指定名称的类进行加载
			Class cls = Class.forName("reflect.MyClass");
			
			Class[] para = new Class[]{String.class, String.class};
			
			//获得该类的构造方法对象，参数为空
			Constructor constructor = cls.getConstructor();
			
			//通过构造方法获得一个实例化对象，注意参数也是为空
			MyClass instance1 = (MyClass) constructor.newInstance();
			
			//调用方法，显示具体内容
			instance1.test();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SecurityException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (NoSuchMethodException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalArgumentException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (InstantiationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}

}

MyClass是被测试类，代码也很简单

/**
 * 
 */
package reflect;

/**
 * @author Administrator
 *
 */
public class MyClass {

	/**
	 * 
	 */
	public MyClass() {
		// TODO Auto-generated constructor stub
		System.out.println("my calss() is created");
	}
	
	public MyClass(String a, String b){
		System.out.println("my calss(a,b) is created");
	}
	
	public void test(){
		System.out.println("mycalss.test() is runing");
	}

}

测试结果：
my calss() is created
mycalss.test() is runing