Copy a .text file using a stream in Java?

I want to copy the file "Hello, how are you?" via stream and create a new file called "copy.txt." Why doesn't this work? I get a FileNotFoundException.

Code is attached below:

package de.thws; // Von mir zum testen von Streams import java.io.*; public class PerStreamDateiEinlesen { public static void main(String[] args) throws FileNotFoundException { copyFileWithErrorHandling3Modularized(); } public static void copyFileWithErrorHandling3Modularized() { // try-with-resource statement try (InputStream fis = new FileInputStream("Hallo wie gehts.text"); OutputStream fos = new FileOutputStream("copy.txt");) { copyImproved(fis, fos); } catch (IOException e) { e.printStackTrace(); } } // Hier kopiere ich die Datei static void copyImproved(InputStream is, OutputStream os) throws IOException { byte[] b = new byte[1024]; int n; do { n = is.read(b); //kann maximal 1024 bytes lesen if (n != -1) os.write(b, 0, n); } while (n != -1); } }