java反射创建对象

package reflect_;


import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class Reflect{

	public static void main(String[] args) {
		// test1();
		test2("reflect_.Reflect", "add", new Class[] { int.class, int.class }, new Object[] { 10, 50 });
		test2("reflect_.Reflect", "add", new Class[] { int.class }, new Object[] { 10 });
		//      类名                                      方法名                       参数类型类的数组                              对应参数类的参数对象的数组
	}

	private static void test2(String className, String methodName, Class[] paramType, Object[] paramValue) {
		try {
			// 1.执行类加载机制
			Class clz = Class.forName(className);
			// 2.根据方法名，获取方法对象
			Method method = clz.getMethod(methodName, paramType);
			// 3.创建实例对象
			Object obj = clz.newInstance();
			// 4.调用对应的成员方法
			method.invoke(obj, paramValue);
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (NoSuchMethodException e) {
			e.printStackTrace();
		} catch (SecurityException e) {
			e.printStackTrace();
		} catch (InstantiationException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			e.printStackTrace();
		}
	}

	private static void test1() {
		Reflect r = new Reflect();
		r.add(10, 20);
	}

	public void add(int a, int b) {
		System.out.println(a + b);
	}

	public void add(int a) {
		System.out.println(a);
	}

}