我的jar文件无法执行

Question

File PrintTest.java :

    public class PrintTest{
      public static void main(String[] args){
           System.out.println("Why are you executing me?");
      }
    }

File Manifest.txt

Main-Class: PrintTest

My command I ran to compress to .jar :

jar cfm PrintTest.jar Manifest.txt PrintTest.class

I also tried this (even though it doesn't matter):

jar cmf PrintTest.jar Manifest.txt PrintTest.class

My Directory Structure: C:\\Program Files\\Java\\jdk1.6.0_24\\PrintTest_jar

PrintTest_jar : PrintTest.java , PrintTest.class , Manifest.txt , PrintTest.jar

When I double-click on the .jar file, nothing happens. No errors, nothing.

PrintTest.class runs fine from the command line. I'm also running on Windows.

Answer 1

When I double-click on the .jar file, nothing happens. No errors, nothing!

When launched like that, the console window will immediately disappear when the program has finished executing. To see the output, you should run the program from the console instead of double clicking the jar file.

edit : To delay the program termination, you could do this:

 Scanner scanner = new Scanner(System.in);
 System.out.print("Press Enter to exit...");
 scanner.next();

However, I think it makes more sense to just run console applications from the console.

Answer 2

亲爱的朋友，您的应用程序是DOS程序，只能在DOS中运行，您没有创建GUI程序，如果是GUI程序，则至少会在计算机上显示..... DOS是用于DOS的。 .....对不起。

Answer 3

The code that was given to you to delay it is correct . However, you need to import an utility from Java libraries for it to work. Type in this before even your class body.

import java.util.Scanner

Answer 4

If I understand your question and the display of your manifest text file then you must ensure that the text file contains a new-line after the last line of text or it will not be processed properly. Please see this for more info: http://download.oracle.com/javase/tutorial/deployment/jar/modman.html