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Some website to remember for 3D-tech-Original

cjren — Mon, 30 Oct 2006 16:11:00 GMT

http://www.csit.fsu.edu/~burkardt/data/data.html
可以从中扑ֈ�大部分文件格式的相关信息。例如BMP�Q�Obj�{�等�?br />
http://www.csit.fsu.edu/~burkardt/data/obj/obj.html
介绍OBJ文�g格式�Q�关键是当中提供了读写和转换OBJ文�g的工具徏议�?br />

cjren 2006-10-31 00:11 发表评论

cjren — Sun, 23 Jul 2006 12:14:00 GMT

��׃��q�图�Q�仔�l�看看和联想一下，也许会有点得�?-)

cjren 2006-07-23 20:14 发表评论

cjren — Sun, 23 Jul 2006 12:10:00 GMT

What do you know The Life Cycle of a Thread?

Can you say something about the life cycle of a thread, it's creating, starting, running, not runnale, and stopping? If you do want to know about more, please check it out: http://java.sun.com/docs/books/tutorial/essential/threads/lifecycle.html

cjren 2006-07-23 20:10 发表评论

cjren — Sun, 23 Jul 2006 11:38:00 GMT

(1)
The Art of Programming Language
《计��机�E�序设计艺术�?清华大学出版�C?/p>

(2)
Introduction to Algorithms, Second Edition
Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest and Clifford Stein
MIT
《算法导论，影印版》高�{�教育出版社

(3)
Intruduction to The Design and Analysis of Algorithms
(US)Anany Levitin
��法设计与分析基��
潘�R 译�?
清华大学出版�C?br />
其实�W�一本我没有看过�Q�只是提及算法方面的书籍�Q�这一本好像都应该��Z�h所知道似的。第二本的课�E�资料可以在mit的open course ware��面下蝲。第三本的译本很不错�Q�感觉很有点�q�默有趣�Q�而且书的�l�构挺新颖，不至于让人马上对��法�q�东西觉得恐怖和烦闷。推荐第三本�?/p>

cjren 2006-07-23 19:38 发表评论

cjren — Sun, 23 Jul 2006 11:28:00 GMT

�U�d�� -- 只有GSM�Q�GPRS是GSM的升�U�版�Q?34-139 手机使用�U�d��的SIM卡 �?

联�?-- GSM 130,131,132 手机使用联通SIM�?br /> -- CDMA 133 (联通新时空)�Q�手��Z��用UIM�?/p>

GSM比较��单。所谓的GSM 900/1800/1900是指GSM手机的工作频率，分别是中国移动支持的900MHz�Q?900MHz和美国常用的1900MHz。在国内用支�?00MHz�?800MHz的GSM 900/1800双频手机��可以了。如果要出国到美国用的，��p��用支�?900MHz的三频手��Z��?/p>

CDMA比GSM的通话质量、手��小和保密性方面都好，但是技�?=市场�?br />CDMA -- CDMA800
-- CDMA 1X 现在联通CDMA�|�络所采取的技术。与真正的CDMA2000相比�Q�CDMA 1x��像我刚才说的，只能支持�?53.6kbps的数据速度�Q�因此被�U�Cؓ�?.5G的技术，�q�不是真�?G的技术�?br /> -- CDMA2000 一�U?G的标准�?/p>

3G 有三个标�?br /> -- WCDMA 有利于中国移动，讑֤�由欧�z�进口，�Ҏ��升��到WCDMA。这套系�l�能够架讑֜�现有的GSM�|�络上，对于�pȝ��提供商而言可以较轻易地�q�渡�Q�而GSM�pȝ��相当普及的亚�z�对�q�套新技术的接受度预料会相当高。因此W-CDMA��h��先天的市��Z��ѝ�?br />
-- CDMA2000 利于联通，讑֤��q��国进口，�Ҏ��升��到CDMA2000。目前��用CDMA的地区只有日、韩和北��，所以CDMA2000的支持者不如W-CDMA多。不�q�CDMA2000的研发技术却是目前各标准中进度最快的�Q�许�?G手机已经率先面世�?

-- TD-SCDMA 中国自己有独立知识��权的产品。采用这一标准�Q�对于国防等重要领域国民�l�济安全有利。据说中国电信和中国�|�通都在申��L��动运营牌照，他们們֐�于TDS-CDMA�?br /> 至于现在中国采用哪一�U�现在还没有定论。毕竟需要市场和企业来最�l�决定，��C��技术优�U�的�ƈ不代表最�l�就能胜出�?br />

cjren 2006-07-23 19:28 发表评论

cjren — Sat, 08 Jul 2006 02:25:00 GMT

"Computer science is no more about computers than astronomy is about telescopes."

E. W. Dijkstra
计算机是一个工��P��一个�h造的工具�Q��h刉��工��L��目的是什么？协助自己完成生��力_��Q�或��切地说是完成自��q��存和生活的需要。由于需要完成大量的�q�算而��生的计算机，即��是到现在也局限于信息的处理，包括��单的�q�算和信息（数字�Q�的存储�?br />
而在学习当中�Q�“sprint�Q�struct”等�q�些名字听�v来真的很大，而我帔R��自己“我需要学习它吗？”。是否不懂它们就不算懂java了呢�Q�我�?月䆾开始觉得java��自��p��来越�q�了�Q�因为我上许多的关于java的论坛，看到的极大部分都是讨论框�Ӟ��而我�Ҏ��没有什么概��c��“需求驱动学习”是我的信条�Q�没有这个需求，你就没有学习那相应知识的必要�Q�更没有动力。也许这是我懒的借口:-) 大概是自己尚且是学生�Q�没有投�w�都企业生��当中因此对这些企业开发的知识没有概念吧。反正觉得现在没有学�q�个的必要，谁知道两�q�后是否有什么summer or XXname的框架出现呢�Q?br />
�q�个暑假其实自己�q�是��x��握时间看看书的，反正又没有找到实习工作。例如data structure & algorithm�Q�算法分析这门课没有学过�Q�真的遗憾，只能自己补补�Q�还有那Developing Games in Java的part 3�Q�当中讲的是3d的renderring�Q�而不涉及opengl以及java3d或opengl binding�{�API�Q�自��p��是很有兴��的。而昨天在国外的大学的�|�站上下载了一个OS评��的lecture notes�Q�正好复习一下操作系�l�的概念�?br />

cjren 2006-07-08 10:25 发表评论

Storage and Dynamic Storage-tech-摘录

cjren — Fri, 07 Jul 2006 02:49:00 GMT

摘要: 2006-7-7 CP2003 -- Principles of Programming Languages 1997 This course (subject) comes frome http://www.cs.jcu.edu.au/Subjects/cp2003/1997/lecturenotes.html, and you can fin... 阅读全文

cjren 2006-07-07 10:49 发表评论

stack & heap (栈和�?, 从C\java\�pȝ��三个角度看其区别-tech-摘录

cjren — Thu, 06 Jul 2006 09:30:00 GMT

上午看某文章时候涉�?strong>�~�冲区溢�?/strong>的问题，谈到C的栈和堆�Q�有所不懂于是baidu了一下发现论坛上的解释都较�ؓ凌�ؕ�Q�google一下后发现国外大学�?font color="#006400">Lecture Notes 中有不少的说明，下面��单的摘录三段�Q�一是c中的�Q�二是对于java的，三是从os角度看的�?br />
Stack vs Heap Allocation
How the memory of the computer is organized for a running program? When a program is loaded into memory, it is organized into three areas of memory, called segments: the text segment, stack segment, and heap segment. The text segment (sometimes also called the code segment) is where the compiled code of the program itself resides. This is the machine language representation of the program steps to be carried out, including all functions making up the program, both user defined and system.

The remaining two areas of system memory is where storage may be allocated by the compiler for data storage. The stack is where memory is allocated for automatic variables within functions. A stack is a Last In First Out (LIFO) storage device where new storage is allocated and deallocated at only one ``end'', called the Top of the stack. This can be seen in Figure 14.13.

When a program begins executing in the function main(), space is allocated on the stack for all variables declared within main(), as seen in Figure 14.13(a). If main() calls a function, func1(), additional storage is allocated for the variables in func1() at the top of the stack as shown in Figure 14.13(b). Notice that the parameters passed by main() to func1() are also stored on the stack. If func1() were to call any additional functions, storage would be allocated at the new Top of stack as seen in the figure. When func1() returns, storage for its local variables is deallocated, and the Top of the stack returns to to position shown in Figure 14.13(c). If main() were to call another function, storage would be allocated for that function at the Top shown in the figure. As can be seen, the memory allocated in the stack area is used and reused during program execution. It should be clear that memory allocated in this area will contain garbage values left over from previous usage.

The heap segment provides more stable storage of data for a program; memory allocated in the heap remains in existence for the duration of a program. Therefore, global variables (storage class external), and static variables are allocated on the heap. The memory allocated in the heap area, if initialized to zero at program start, remains zero until the program makes use of it. Thus, the heap area need not contain garbage.
��结�Q?br />Stack: automatic variables within functions
Heap: global variables (storage class external), and static variables
============================
In java 情况如下
(1)
The stack is the program memory area, so all your primitive type variables and the memory adress of your objects are written on the stack. It is a fast access valuable memory area.
The heap is where the VM keeps the objects, and it is a huge amount of memory. When you create an object, the VM puts the object in the HEAP and puts the adress of the object created on the STACK.
(2)
There are two kinds of memory used in Java. These are called stack memory and heap memory. Stack memory stores primitive types and the addresses of objects. The object values are stored in heap memory. An object reference on the stack is only an address that refers to the place in heap memory where that object is kept.
It is useful to know that these two different kinds of memory exist in Java. Stack memory is the program's memory, and heap memory resides outside of the program.�q�好像有点跟C的不同（相反�Q��?br />引入一点垃圑֛�收机制的知识
When you need a new object, Java allocates the required memory. When you are done with an object, the memory is reclaimed for you automatically via Java's garbage collection facility.
Garbage collection runs as a thread in the background, looking for objects that no longer have a usable reference. When it finds them, it destroys them and reclaims the memory.
The implementation of garbage collection varies between Java Virtual Machines. They generally follow the same process, however. First, the garbage collector gets a snapshot of all running threads and all loaded classes. Then, all objects that are referred to by this thread set are marked as current. The process stops when all objects that it is possible to reach have been marked and the rest have been discarded.
In order to help the Virtual Machine, it is a good idea to remove your references to unneeded objects. This is often done by simply setting your reference to null:
Test t = new Test();
t.someAction();
// all done
t = null;
��结�Q?br />Stack: Primitive data types(primitive types), the addresses of objects(=references).
Heap: objects.

===============================================
从系�l�的角度�?stack�Q�栈�Q�和heap(堆）
Dynamic Data Structures: The Heap
A typical personal computer or workstation today has somewhere between 16 and 64 megabytes of RAM installed. Using a technique called virtual memory, the system can swap pieces of memory on and off the machine's hard disk to create an illusion for the CPU that it has much more memory, for example 200 to 500 megabytes. While this illusion is complete as far as the CPU is concerned, it can sometimes slow things down tremendously from the user's perspective. Despite this drawback, virtual memory is an extremely useful technique for "increasing" the amount of RAM in a machine in an inexpensive way. Let's assume for the sake of this discussion that a typical computer has a total memory space of, for example, 50 megabytes (regardless of whether that memory is implemented in real RAM or in virtual memory).
The operating system on the machine is in charge of the 50-megabyte memory space. The operating system uses the space in several different ways, as shown here:

The operating system and several applications, along with their global variables and stack spaces, all consume portions of memory. When a program completes execution, it releases its memory for reuse by other programs. Note that part of the memory space remains unused at any given time.

This is, of course, an idealization, but the basic principles are correct. As you can see, memory holds the executable code for the different applications currently running on the machine, along with the executable code for the operating system itself. Each application has certain global variables associated with it. These variables also consume memory. Finally, each application uses an area of memory called the stack, which holds all local variables and parameters used by any function. The stack also remembers the order in which functions are called so that function returns occur correctly. Each time a function is called, its local variables and parameters are "pushed onto" the stack. When the function returns, these locals and parameters are "popped." Because of this, the size of a program's stack fluctuates constantly as the program is running, but it has some maximum size.

As a program finishes execution, the operating system unloads it, its globals and its stack space from memory. A new program can make use of that space at a later time. In this way, the memory in a computer system is constantly "recycled" and reused by programs as they execute and complete.

In general, perhaps 50 percent of the computer's total memory space might be unused at any given moment. The operating system owns and manages the unused memory, and it is collectively known as the heap. The heap is extremely important because it is available for use by applications during execution using the C functions malloc (memory allocate) and free. The heap allows programs to allocate memory exactly when they need it during the execution of a program, rather than pre-allocating it with a specifically-sized array declaration.

cjren 2006-07-06 17:30 发表评论

package & import-java-tech-原创

cjren — Thu, 06 Jul 2006 01:00:00 GMT

在尝试徏立自��q��可重用package的时候，对package和import语句做了些试验，记录�l�果如下�?/p>

使用说明�Q?br />(1)对于src\com\cjren\util\ClassA.java�q�个提供�l�其他类使用的class.
package com.cjren.util;
public class ClassA {
...
}
�~�译�?
javac -d . ClassA.java // -d . 表示了以当前目录为package语句生成的相�Ҏ��目录�?br />�l�果是在ClassA.java所在的目录下生成了com.cjren.util包，里面含ClassA.class�Q�这个包可以复制剪脓到其他的地方供其他类使用�?br />Notes:
必须使用"-d ."�Q�否则ClassA.class�q�不会放在com.cjren.util包里面，而是生成在和ClassA.java相同的目录下�?/p>

(2)对于要��用ClassA的ClassB.java.
import com.cjren.util.ClassA;
public class ClassB {
... // use ClassA here
}

To compile: javac ClassB.java
To run:     假设com包放在和ClassB.java的当前目�?br />            java ClassB
            // or java -cp . ClassB // here use the "-cp ." as the current directory to find the package com.
            假设com包放在D:\Program Files\Java\mypackages�?br />            java -cp D:\Program Files\Java\mypackages ClassB

Notes:
错误一�Q?br />package com.cjren.util;
public class ClassA {
...
}
�~�译后直接把com.cjren.util包里面的ClassA.class文�g拯��到和ClassB.java相同的目录下直接使用�Q?br />public class ClassB {
... // use ClassA here
}
To compile: javac ClassB.java
错误信息�?br />"ClassB.java:某一�? 无法讉K�� ClassA
错误的类文�g�Q?.\ClassA.class
�c�L��件包含错误的�c�： com.cjren.util.ClassA
请删除该文�g或确保该文�g位于正确的类路径子目录中�?
想一想�ؓ什么出错信息是��_��“错误的�c�L��Ӟ�� .\ClassA.class�Q?�c�L��件包含错误的�c�： com.cjren.util.ClassA”呢�Q�因�?错误的类文�g�Q?.\ClassA.class"当中包含�?错误的类�Q?com.cjren.util.ClassA"�q�个信息�Q�而这�?com.cjren.util.ClassA"是在ClassA.java中的"package com.cjren.util;"语句所造成的�?br />正确的做法是把ClassA.class所在的包整个复制粘贴到ClassB.java所在的目录下，或者在ClassB.java所在的目录下�h为手动的建立com\cjren\util\目录�Q�然后直接把ClassA.class文�g复制�_�脓到此。这暗示了代码生成的包和手动建立的目录可能是一栗��?br />可见,当ClassA.java的源代码中含"package com.cjren.util;"语句�Q�则生成com.cjren.util包里面的ClassA.class文�g里面应该��׃��包含了自��p��个class文�g所属的包信息，所以这个ClassA.class只能攑֜��q�个代码中已�l�指定的特定包的路径下��用，而不能把�q�个ClassA.class独立出来使用�Q�因��L��话将ClassA.class文�g属性中的的包信息不相符。当然当�q�个ClassA.java没有昑ּ�地制定package语句信息时候，我怀疑（也觉得应该）是默认在ClassA.class文�g当中包含了包的信息就�?."�Q�可以理解�ؓ默认的加入了"package .;"语句�?/p>

错误二：
public class ClassA {
...
}
�~�译后这个ClassA.class文�g中含有的包的信息�?."当前目录��包�Q?br />把这个ClassA.class文�g�Q�移��C��ClassB.java所在的目录为当前父目录的�h为手动徏立的com\cjren\util目录下�?br />import com.cjren.util.ClassA;
public class ClassB {
... // use ClassA here
}

To compile: javac ClassB.java
错误信息�?br />"ClassB.java:某一�? 无法讉K�� com.cjren.swing.ClassA
错误的类文�g�Q?.\com\cjren\util\ClassA.class
�c�L��件包含错误的�c�： ClassA
请删除该文�g或确保该文�g位于正确的类路径子目录中�?
想一想�ؓ什么出错信息是��_��“错误的�c�L��Ӟ�� .\com\cjren\util\ClassA.class�Q�类文�g包含错误的类�Q?ClassA”呢�Q�因��Z��q�个com.cjren.util包中的ClassA.class文�g本来所默认的包信息�?."�Q�在ClassA.java中�ƈ没有使用"package"语句指定ClassA应该属于包com\cjren\util�q�个信息�?/p>

��结�Q?br />在尝试过�E�当中发玎ͼ�
public class ClassA {
...
}
�?br />package com.cjren.util;
public class ClassA {
...
}
�q�两个只差了一个package语句的class文�g大小有十几到几十k上的区别�Q�这可能�q�一步证明了.java文�g中的package语句会在.class文�g中加入相应的包信息，�q�个包信息决定了�q�个class被��用时候的方式�Q�是否需要import特定的包�Q��?br />�q�有一点要注意的是�Q?br />package com.cjren.util;
public class ClassA {
...
}
之后无论是��?javac ClassA.java 或�?javac -d . ClassA.java�~�译都不会媄响ClassA.class文�g当中所含有的包信息�Q�这两种�~�译方式所造成的区别在上面的��用说明中已经说过了�?/p>

cjren 2006-07-06 09:00 发表评论

2006-06-24build project 自己搭徏��的project目录-java-tech-原创

cjren — Sun, 25 Jun 2006 17:35:00 GMT

2006-6-24

��试以一个例子来说明搭徏一�?/span> project 时候的目录构徏情况�?/span>

情况一

下面以一个地囄��辑器的例子�ؓ�?/font>

父目录是 ”project mapeditor�?

.\Image �Q?/span> �E�序使用到的囄��?/span>

.\Maps �Q?/span> �E�序�q�行时用户保存的自定义地图�?/span>

.\com �Q?/span> �ȝ��?/span> MapEditor.java ��会是用到的 package 的源文�g�?/span>

.\com\cjren\swing\MyFilter.java

MapEditor.java �Q?/span> �ȝ��序源文�g�Q�代码中没有 ”package�?/span> 语句�?/span>

runMapEditor.bat �Q?/span> 完成�~�译和运行所需的所有工作�?/span>

下面主要看看 runMapEditor.bat 的内容：

@echo off

rem output the date and time

date /T

time /T

echo welcome to my map editor :-)

rem make the directory for class files

mkdir .\build\classes

rem compile the source files

javac -d .\build\classes MapEditor.java

rem run the application,

rem but you must avoid this: java.\build\classes\MapEditor,

rem which will be an error

java -cp .\build\classes MapEditor

rem clean everything in the build folder

rmdir .\build /S /Q

pause

从上面的具体代码中可以看出在�~�译和运行的时候，所有的 class 文�g都回被放�?/span> .\build\classes �q�个文�g夹中�Q�这个文件夹是动态生成�ƈ且最后会被清楚掉的�?/span>

�q�里有三个值得注意的地斏V�?/span>

一�Q�通过 �?javac -d .\build\classes MapEditor.java�?/span> �Q�不单只�?/span> MapEditor.java 所定义�?/span> class 都被放于 .\build\classes 中，甚至�q?/span> .\com �?/span> MyFilter.java 所对应�?/span> class 也都�?/span> .\build\classes\com\cjren\swing 中，�?/span> com 包在 .\bulid\classes 下是自动被准��生成的。也��是说所有的 .class 文�g都被攑֜� .\bulid\classes 文�g夹中了�?/span>

二，当��?/span> ”java -cp .\build\classes MapEditor�?/span> 来运行程序的时候，�q�没有因�?/span> Image 文�g夹不�?/span> .\build\classes 而出错。这说明�?/span> .java 文�g中的代码已经军_��了它所使用到的 Image 文�g夹的位置�Q�这个位�|�是相对�?/span> .java 文�g所在的位置来说的，而不�?/span> .class �?/span>

三，我尝试了�?/span> d 盘下新徏了一�?/span> a 目录�Q�然后把

javac -d .\build\classes MapEditor.java

java -cp .\build\classes MapEditor

换成

javac -d d:\a MapEditor.java

java -cp d:\a MapEditor

之后�Q�其�?/span> ”project mapeditor�?/span> 下的所有东襉K��没有改变�Q�程序依然成功执行。这��p��一步证明了 .java 文�g中的代码军_��了所有其他目录或文�g元素的相对位�|�，�q�个位置�?/span> .java 文�g所在的目录为标准。而与 .class 文�g的�\径无兟뀂但是：别�؜淆了 A.class 它所使用到的包的 .class 的�\径是�?/span> A.class 文�g的�\径�ؓ标准的！�Q�！�q�就与上�?/span> MapEditor.class 也和�Q�必��d��Q?/span> com 包同处于 bulid\classes 目录下没有矛盾�?/span>

情况�?/span>

目的是把上面情况一中所有的文�g和文件夹都包含在 src �q�个文�g夹中�Q��?/span> src 本��n��是父目�?/span> project mapeditor2 下的一个文件夹。而且我希望编译时候生成的 build 文�g夹和 src 文�g夹的关系是：

\project mapeditor2\src

\project mapeditor2\build

src 文�g夹的内容如下�Q?/span>

注意批处理文�?/span> runMapEditor.bat �?/span> src 文�g夹下�Q�而且在此情况下， runMapEditor.bat 的内容将有所变化�Q?/span>

@echo off

rem output the date and time

date /T

time /T

echo welcome to my map editor :-)

rem make the directory for class files

mkdir ..\build\classes

rem compile the source files

javac -d ..\build\classes MapEditor.java

rem run the application,

rem but you must avoid this: java.\build\classes\MapEditor,

rem which will be an error

java -cp ..\build\classes MapEditor

rem clean everything in the build folder

rmdir ..\build /S /Q

pause

情况一和情况二的差别不大，只是源代码文件多一层的文�g夹的包裹。而且最大的共同�Ҏ�� runMapEditor.bat 和源代码文�g在同一个文件夹下�?/span>

情况�?/span>

��试在情况二的基��上把 runMapEditor.bat 提到�?/span> src 以及 build 相同的父目录下。假讄��目录�?/span> project mapeditor3 �Q�则�Q?/span>

现在 runMapEditor.bat 的内�Ҏ��Q?/span>

@echo off

rem output the date and time

date /T

time /T

echo welcome to my map editor :-)

rem make the directory for class files

mkdir .\build\classes

rem go into the src directory

cd src

rem compile the source files

javac -d ..\build\classes MapEditor.java

rem run the application,

rem but you must avoid this: java.\build\classes\MapEditor,

rem which will be an error

java -cp ..\build\classes MapEditor

rem clean everything in the build folder

rmdir ..\build /S /Q

pause

在尝试工�E�当中，发现以下的做法将找不�?/span> Image 文�g夹：

cd src

javac -d ..\build\classes MapEditor.java

cd ..

java -cp .\build\classes MapEditor

�q�种修改所造成的区别是�q�行 ”java�?/span> 命��o的位�|�不同了。可以猜��x��需要在 src 文�g夹内�q�行 java 命��o�Q��?/span> src 文�g夹中含有所有程序所需的代码和 image 素材�?/span>

下面提供一个稍微不同的批处理文�Ӟ�� runMapEditor2.bat �Q�它也同样处�?/span> project mapeditor3 �q�个父目录下�Q?/span>

runMapEditor2.bat 的内容如下：

@echo off

mkdir d:\a

cd src

javac -d d:\a MapEditor.java

java -cp d:\a MapEditor

rmdir d:\a /S /Q

pause

�q�个修改�q�的例子�?/span> class 文�g都移到较�q�的地方 (d:\a) �Q�但是还可以成功�q�行。小�l�一下它能成功运行的特点�Q?/span>

一�Q?/span> src 文�g夹中已经包含了所有的元素�Q�包括所需的外�?/span> package 代码�Q�包�?/span> image 文�g夏V��这些元素都必须使得�ȝ��?/span> .java 能成功的�~�译�?/span>

二，�q�行 ”java�?/span> 命��o都在 src �q�个目录下。也��是说都在和代码处在相同的文件�\径下�Q�而不是其他�Q何�\径�?/span>

情况一都三的小�l?/span>

基本满��了在 windows �pȝ��下开发小��目的需求，我在�q�三个尝试的例子中主�E�序 MapEditor.java 都没有含�?/span> ”package main�?/span> �q�类的打包语句�?/span>

cjren 2006-06-26 01:35 发表评论

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