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I have a java project which should read file in a external folder. I give the file path as '../FolderName' in the class. But if I generated a jar file from this project, it cannot read the file. What is the correct way to define the folder path in this kind of situations ?

Chamara Nimantha
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    You can provide some code you have written so far, the name of the jar, and maybe a location inside the project or filesystem. Do you have problems with other jars/zips, or only with those built in netbeans? – Javier Aug 03 '15 at 11:24
  • [Load Icon Image Exception](http://stackoverflow.com/q/9864267/1393766) <- rule applies to all resources, not only images – Pshemo Aug 03 '15 at 11:36

3 Answers3

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You should use java.lang.Class.getResourceAsStream(String).

It reads the file from inside your JAR.

Example:

InputStream in = getClass().getResourceAsStream("/classpath/to/my/file");
BufferedReader input = new BufferedReader(new InputStreamReader(in));

A good Reference : How to read a file from a jar file?

Community
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rhitz
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The correct way to pass the absolute path to your code (jar) as program argument.

java -jar myjar.jar abs_path

You can then access the absolute path in the main() method of your class (mentioned in the manifest.mf file of a JAR) as follows:

String filePath = args[0];
aviad
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InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("/classpath/toyourfile");
Sandeep Bhardwaj
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