blocks|key|1993879|text|由于您已经提到您正在使用Eclipse...Eclipse可以为您创建JAR，只要您运行过一次具有main的类。右键单击项目并单击Export，然后选择Java文件夹下的"Runnable+JAR+file“。在启动配置中选择类名，选择保存jar的位置，并在必要时决定如何处理库。单击完成，将手放在裤子上擦拭。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1993880|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Sine you've mentioned you're using Eclipse... Eclipse can create the JARs for you, so long as you've run each class that has a main once. Right-click the project and click Export, then select "Runnable JAR file" under the Java folder. Select the class name in the launch configuration, choose a place to save the jar, and make a decision how to handle libraries if necessary. Click finish, wipe hands on pants.

blocks|key|1994056|text|方式一：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1994057|现在我们有了包含主类testa的java文件test.java，首先，我们将java文件简单地编译为，我们在相同的目录中创建文件manifest.txt，并编写Main-+class+:+mainclassname。例如：|1994058|++Main-Class:+testa|code-block|syntax|javascript|1994059|然后我们使用以下命令创建jar文件：|1994060|++jar+cvfm+anyname.jar+manifest.txt+testa.class|1994061|然后，我们通过以下命令运行jar文件:+java+-jar+anyname.jar|1994062|方式二：|1994063|假设我们有一个名为one的包，每个类都在它里面。然后我们使用以下命令创建jar文件：|1994064|++jar+cf+anyname.jar+one|1994065|然后在anyname.jar文件中打开META-INF目录中的manifest.txt，并编写|1994066|++Main-Class:+one.mainclassname+|1994067|在第三行。，然后我们使用以下命令运行jar文件：|1994068|++java+-jar+anyname.jar|1994069|要使jar文件具有多个类文件:+jar+cf+anyname.jar+one.class+two.class+three.class......|1994070|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|17|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|18|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|19|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|1A|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|1B|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1C|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1D|8|@]|9|@]|A|$]]|$1|S|3|T|5|F|7|1E|8|@]|9|@]|A|$G|H]]|$1|U|3|V|5|6|7|1F|8|@]|9|@]|A|$]]|$1|W|3|X|5|F|7|1G|8|@]|9|@]|A|$G|H]]|$1|Y|3|Z|5|6|7|1H|8|@]|9|@]|A|$]]|$1|10|3|11|5|F|7|1I|8|@]|9|@]|A|$G|H]]|$1|12|3|13|5|6|7|1J|8|@]|9|@]|A|$]]|$1|14|3|-4|5|6|7|1K|8|@]|9|@]|A|$]]]|15|$]]

way 1 :

Let we have java file test.java which contains main class testa
now first we compile our java file simply as javac test.java
we create file manifest.txt in same directory and we write Main-Class: mainclassname . e.g : 

<pre><code> Main-Class: testa
</code></pre>

then we create jar file by this command : 

<pre><code> jar cvfm anyname.jar manifest.txt testa.class
</code></pre>

then we run jar file by this command : java -jar anyname.jar

way 2 :

Let we have one package named one and every class are inside it.
then we create jar file by this command : 

<pre><code> jar cf anyname.jar one
</code></pre>

then we open manifest.txt inside directory META-INF in anyname.jar file and write 

<pre><code> Main-Class: one.mainclassname 
</code></pre>

in third line., then we run jar file by this command : 

<pre><code> java -jar anyname.jar
</code></pre>

to make jar file having more than one class file : jar cf anyname.jar one.class two.class three.class......

blocks|key|1780361|text|将所有6个类放到6个不同的项目中。然后创建所有6个项目的jar文件。通过这种方式，您将获得6个可执行jar文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1780362|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Put all the 6 classes to 6 different projects. Then create jar files of all the 6 projects. In this manner you will get 6 executable jar files.

blocks|key|1780383|text|通常，您需要向清单中放入比使用-e开关所获得的更多内容，在这种情况下，语法为：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1780384|jar+-cvfm+myJar.jar+myManifest.txt+myApp.class|code-block|syntax|javascript|1780385|其内容为："create+verbose+jarFilename+manifestFilename"，后跟要包含的文件。|1780386|请注意，您提供的清单文件的名称可以是任何名称，因为jar会自动对其进行重命名，并将其放入jar文件中的正确位置。|1780387|entityMap^0|F|2|0|0|0|P|3|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

Often you need to put more into the manifest than what you get with the <code>-e</code> switch, and in that case, the syntax is:

<pre><code>jar -cvfm myJar.jar myManifest.txt myApp.class
</code></pre>

Which reads: "create verbose jarFilename manifestFilename", followed by the files you want to include.

Note that the name of the manifest file you supply can be anything, as <code>jar</code> will automatically rename it and put it into the right place within the jar file.

I'm learning Java and I have a problem. I created 6 different classes, each has it's own <code>main()</code> method. I want to create executable <code>.jar</code> for each class, that is 6 executable <code>.jar</code> files.

So far I tried 

<pre><code>java -jar cf myJar.jar myClass.class
</code></pre>

and I get 'Unable to access jarfile cf'. I'm doing something wrong but I don't know what. I'm also using Eclipse IDE if that means something.

Java creating .jar file

Eclipse

Java

我正在学习Java，我有一个问题。我创建了6个不同的类，每个类都有自己的main()方法。我想为每个类创建可执行的.jar，即6个可执行的.jar文件。到目前为止我试过了java -jar cf myJar.jar myClass.class我得到'Unable to access jarfile cf‘。我做错了什么...

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