file not found exception in jar

Question

public class ABC {
    public ABC() {
        File file = new File(\"xyz.xml\");

but when I run my jar as follows:

java -jar filena         


        

Answer 1

If you need to read file content in JARs, you can not use File class directly. Using ClassLoader to load it:

// for example read the SeleniumConfiguration.xml in the default package

InputStream input = SeleniumConfiguration.class.getResourceAsStream("/SeleniumConfiguration.xml");

Answer 2

Did you put your xml file at the root of the jar file? If you use path like "/Element.xml", the jar file structure should be like:

jar-file

• com
• META-INF
• Element.xml

Answer 3

The NullPointerException is a clear indication that the file was not found.

InputStream input=ABC.class.getResourceAsStream("/Element.xml");

Where is your XML file? If you place it in the same package (directory inside the jar file) as ABC.class, then it should be Element.xml without the leading slash.

Answer 4

Normally you can use the InputStream as suggested, but incase you want to do further non-java operations on the file e.g decrypting it using external application etc, you can use FileOutputStream to write this stream into a file and then use it's path as a correct file path. In simple words, you can unjar this file to your file system.