Java开发网 - 我的hello world

Topic: 我的hello world

1.我的hello world	Copy to clipboard
Posted by: dmcz Posted on: 2004-09-02 13:31 javac后提示： test.java:1: class HelloWorld is public, should be declared in a file named helloworld.java public class HelloWorld { ^ 1 error 请教各位老师出什么错了啊？

2.Re:我的hello world [Re: dmcz]	Copy to clipboard
Posted by: nothing Posted on: 2004-09-02 13:37 文件名用: HelloWorld.java

3.Re:我的hello world [Re: dmcz]	Copy to clipboard
Posted by: dmcz Posted on: 2004-09-02 14:07 谢谢您nothing老师! 您就是我的第一课老师.

4.Re:我的hello world [Re: dmcz]	Copy to clipboard
Posted by: nothing Posted on: 2004-09-02 15:05 dmcz wrote: 谢谢您nothing老师! 您就是我的第一课老师.

5.Re:我的hello world [Re: dmcz]

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Posted by: dmcz
Posted on: 2004-09-02 16:07

老师!你还在吗?
nothing老师烦请您再帮我解释一下这个问题
java HelloWorld时
Exceptioninthread"main"java.lang.NoClassDefFoundError:HelloWorld
根据我在网上查到的资料说是因为没有加变量"."(dot),可我在PATH中加了呀?
C:\j2sdk1.4.2_05\bin;.;C:\j2sdk1.4.2_05\lib;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;C:\KAV6
这怎么回事呢?

6.Re:我的hello world [Re: dmcz]	Copy to clipboard
Posted by: nothing Posted on: 2004-09-02 16:20 . 该加在 classpath中

7.Re:我的hello world [Re: dmcz]	Copy to clipboard
Posted by: dmcz Posted on: 2004-09-02 16:33 多么令人激动的一刻啊!真可惜贴不出来.多想和大家一起分享这具有重要意义的一刻! 来吧nothing老师,干一杯!让明天见证历史!

8.Re:我的hello world [Re: dmcz]	Copy to clipboard
Posted by: nothing Posted on: 2004-09-02 16:46 dmcz wrote: 多么令人激动的一刻啊!真可惜贴不出来.多想和大家一起分享这具有重要意义的一刻! 来吧nothing老师,干一杯!让明天见证历史!

9.Re:我的hello world [Re: dmcz]	Copy to clipboard
Posted by: bluedest Posted on: 2004-09-02 16:59 这哥们的好学精神值得学习继续努力

10.Re:我的hello world [Re: dmcz]	Copy to clipboard
Posted by: why Posted on: 2004-09-02 19:06 >> C:\j2sdk1.4.2_05\bin;.;C:\j2sdk1.4.2_05\lib 为什么那样多大侠喜欢在 PATH 或 CLASSPATH 上加入像 C:\j2sdk1.4.2_05\lib 的咚咚？请问是哪本书指示的？

11.Re:我的hello world [Re: dmcz]	Copy to clipboard
Posted by: booolee Posted on: 2004-09-03 10:18 很多人搞不清楚状况，所以觉得可以的path都给加上了，哈哈！！希望楼主在Helloworld之后，继续推出好的“作品”，加油吧，书籍才是你最好的老师！

12.Re:我的hello world [Re: why]	Copy to clipboard
Posted by: href Posted on: 2004-09-03 10:20 why wrote: >> C:\j2sdk1.4.2_05\bin;.;C:\j2sdk1.4.2_05\lib 为什么那样多大侠喜欢在 PATH 或 CLASSPATH 上加入像 C:\j2sdk1.4.2_05\lib 的咚咚？请问是哪本书指示的？不过有书上讲到在CLASSPATH环境变量中加dt.jar, tools.jar 不知用意再哪里

13.Re:我的hello world [Re: href]

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Posted by: why
Posted on: 2004-09-03 10:27

href wrote:
不过有书上讲到在CLASSPATH环境变量中加dt.jar, tools.jar
不知用意再哪里

I only know that they are for SDK only.
Since you asked, let's take a look at the Java documentation on the matter:
http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/jdkfiles.html

c:\j2sdk1.4.2\lib
Files used by the development tools. These include tools.jar, which
contains non-core classes for support of the tools and utilities in the SDK.
Also includes dt.jar, the DesignTime archive of BeanInfo files that
tell interactive development environments (IDE's) how to display the Java
components and how to let the developer customize them for the application.

14.Re:我的hello world [Re: dmcz]	Copy to clipboard
Posted by: dmcz Posted on: 2004-09-03 15:35 我是从VC++转过来的学生,初步了解一下JAVA,感觉没什么特殊,JAVA能做到的VC++可以做的更好,不知道为什么JAVA会风靡?!!

15.Re:我的hello world [Re: dmcz]	Copy to clipboard
Posted by: decun Posted on: 2004-09-03 20:36 dmcz wrote: 我是从VC++转过来的学生,初步了解一下JAVA,感觉没什么特殊,JAVA能做到的VC++可以做的更好,不知道为什么JAVA会风靡?!! 个人感觉是JAVA的有些机制让他比C++要安全一些

16.Re:我的hello world [Re: dmcz]	Copy to clipboard
Posted by: why Posted on: 2004-09-03 20:40 请开新话题讨论和比较 Java 和 C++/VC++ 就此关版