Sam Sam - 1 year ago 61
Java Question

How to read a file from a jar file?

I have a file in a JAR file. It's

, for example.

How can I access it? My source code is:

Double result=0.0;
File file = new File("1.txt")); //how get this file from a jar file
BufferedReader input = new BufferedReader(new FileReader(file));
String line;
while ((line = input.readLine()) != null) {
result= parseDouble(line.split(":")[1]);
return result;


You can't use File, since this file does not exist independently on the file system. Instead you need getResourceAsStream(), like so:

InputStream in = getClass().getResourceAsStream("/1.txt");
BufferedReader input = new BufferedReader(new InputStreamReader(in));