無法打開可執行jar文件

Question

這些正是創建可執行jar文件的步驟，以便我可以通過雙擊運行我的swing程序，但它給了我一個錯誤，說「無效或損壞的jar文件」 也試圖通過命令提示符執行它給了我相同的錯誤

Step 1:create a .java file which contains my swing code 
Step 2:compile the .java file to .class file 
Step 3:create jar file using the command jar cf name.jar classname.class 
Step 4:open jar file using winrar archiever and modify manifest file by adding Main-class:classname 
Step 5:try to execute the jar file 

但上述步驟不工作，我不明白爲什麼？

我想另一件事太

Step 1:create a .java file which contains my swing code 
Step 2:compile the .java file to .class file 
Step 3:create jar file using the command jar cf name classname.class 
Step 4:open jar file using winrar archiever and modify manifest file by adding Main-class:classname 
Step 5:try to execute the jar file.In this case i can open my file through command prompt but not by double clicking. I tried to select javaw option through Open with option but it doesn't give any ouput(not even error) 

Answer 1

你可以試試：

java -cp name.jar Classname 

，並檢查在命令提示符下的錯誤。

如果您的程序需要一些外部庫，您可以在清單文件中提及它們。

Class-Path: lib/file1.jar lib/file2.jar 

其中lib位於jar文件所在的同一目錄中。