java - Executing a python file from within JAR -


i trying figure out how reference python file can execute within java gui jar. needs portable solution, using absolute paths not work me. have listed project structure below, , have included code how trying execute python script..i have read things using resources, have been unable implement successfully. appreciate can provide!

private void jbutton1actionperformed(java.awt.event.actionevent evt) {                                              try {         runtime rt = runtime.getruntime();         process pr = rt.exec("python /scripts/script.py");          bufferedreader bfr = new bufferedreader(new inputstreamreader(pr.getinputstream()));         string line = "";         while((line = bfr.readline()) != null)             system.out.println(line); }     catch(exception e) {         system.out.println(e.tostring()); } }     --onestopshop (project)   --source packages     --images     --onestopshop       --home.java     --scripts       --script.py

starting file path / means want start @ root of file system.

your code worked me removing leading slash:

public static void main(string[] args) {     try {         file python = new file("scripts/script.py");         system.out.println(python.exists()); // true          runtime rt = runtime.getruntime();         process pr = rt.exec("python scripts/script.py"); // print('hello!')          bufferedreader bfr = new bufferedreader(new inputstreamreader(pr.getinputstream()));         string line = "";         while((line = bfr.readline()) != null)             system.out.println(line);     }     catch(exception e) {         system.out.println(e.tostring());     } }  // true // hello! // process finished exit code 0

the reason why putting wrong file did not show error because java code displays input stream (getinputstream()), not error stream (geterrorstream()):

    public static void main(string[] args) {     try {         runtime rt = runtime.getruntime();         process pr = rt.exec("python scripts/doesnotexist.py");          bufferedreader bfr = new bufferedreader(new inputstreamreader(pr.geterrorstream()));         string line = "";         while((line = bfr.readline()) != null)             system.out.println(line);     }     catch(exception e) {         system.out.println(e.tostring());     } }  // python: can't open file 'scripts/doesnotexist.py': [errno 2] no such file or directory // process finished exit code 0

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