createjframe.java

疯狂Java讲义_源码(含Java设计模式CHM

import java.lang.reflect.*;

/**
 * Description:
 * <br/>Copyright (C), 2008-2010, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee [e-mail]
 * @version  1.0
 */
public class CreateJFrame
{
	public static void main(String[] args)
		throws Exception
	{
		//获取JFrame对应的Class对象
		Class<?> jframeClazz = Class.forName("javax.swing.JFrame");
		//获取JFrame中带一个字符串参数的构造器
		Constructor ctor = jframeClazz
			.getConstructor(String.class);
		//调用Constructor的newInstance方法创建对象
		Object obj = ctor.newInstance("测试窗口");
		//输出JFrame对象
		System.out.println(obj);
	}
}