test.java

来自「疯狂Java讲义_源码(含Java设计模式CHM」· Java 代码 · 共 69 行

/**
 * Description:
 * <br/>Copyright (C), 2005-2008, 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
 */
class Root
{
	static{
		System.out.println("Root的静态初始化块");
	}
	{
		System.out.println("Root的普通初始化块");
	}
	public Root()
	{
		System.out.println("Root的无参数的构造器");
	}
}
class Mid extends Root
{
	static{
		System.out.println("Mid的静态初始化块");
	}
	{
		System.out.println("Mid的普通初始化块");
	}
	public Mid()
	{
		System.out.println("Mid的无参数的构造器");
	}
	public Mid(String msg)
	{
		//通过this调用同一类中重载的构造器
		this();
		System.out.println("Mid的带参数构造器，其参数值：" + msg);
	}
}
class Leaf extends Mid
{
	static{
		System.out.println("Leaf的静态初始化块");
	}
	{
		System.out.println("Leaf的普通初始化块");
	}	
	public Leaf()
	{
		//通过super调用父类中有一个字符串参数的构造器
		super("Struts2权威指南");
		System.out.println("执行Leaf的构造器");
	}

}

public class Test
{
	public static void main(String[] args) 
	{
		new Leaf();
		new Leaf();

	}
}