java中finnally的疑惑（转）

这是转自javaeye中一个作者的程序，但结果不明白，请大家讨论之。。。

package finallyTest;
public class FinallyTest 
{
	public static void main(String args[])
	{
		System.out.println("in main return: " + new FinallyTest().getString());
	}
	
	public String getString()
	{
		String returnString = null;
		try
		{
			returnString = "this string will be return.";
			return returnString;		
		}finally
		{			
			System.out.println("execute finally...");
			System.out.println("before clean returnString's value: " + returnString);
			returnString = null;
			System.out.println("after  clean returnString's value: " + returnString);
			System.out.println("execute finally end.");
		}		
	}
}

结果：
execute finally...
before clean returnString's value: this string will be return.
after  clean returnString's value: null
execute finally end.
in main return: this string will be return.

2，

package finallyTest;

public class FinallyTest1 
{
	public static void main(String args[])
	{
		System.out.println("return: " + new FinallyTest1().getMessage().message);
	}
	
	public Message getMessage()
	{
		Message returnMessage = new Message();
		try
		{
			returnMessage.message = "message";
			return returnMessage;		
		}finally
		{			
			System.out.println("execute finally...");
			System.out.println("before clean returnString's value: " + returnMessage.message);
			returnMessage.message = null;
			System.out.println("after  clean returnString's value: " + returnMessage.message);
			System.out.println("execute finally end.");
		}		
	}
}

class Message
{
	public String message = "message";
}

执行结果：
execute finally...
before clean returnString's value: message
after  clean returnString's value: null
execute finally end.
return: null