How to execute a .jar file inside project directory in Java?

Question

I have a .jar file that I want to execute in java. The .jar file is located inside the main project directory. How can I do that

public void pickColor (ActionEvent event) throws IOException, InterruptedException {
    String filePath = "pickColor.jar";
    Runtime.getRuntime().exec(" java -jar " + filePath);
}

If I add the full path of the file it works ...

possible duplicate with https://stackoverflow.com/questions/17693540/how-to-run-a-jar-file-from-within-java-program — Ahmad Al-Kurdi, Jan 04 '18 at 09:38
Please refer the previous answer: https://stackoverflow.com/questions/4936266/execute-jar-file-from-a-java-program — Vishwa Dany, Jan 04 '18 at 12:27

score 0 · Answer 1 · answered Jan 04 '18 at 09:41

The most realiable alternative I think is to write the jar to temp file. Some thing like:

    File file = File.createTempFile("pickColor", ".jar");
    FileUtils.copyURLToFile(getClass().getResource(filePath), file);
    Runtime.getRuntime().exec(" java -jar " + filePath);

FileUtils is from apache common-io.

score 0 · Accepted Answer · answered Jan 04 '18 at 09:42

0

you can try the below code

public void pickColor (ActionEvent event) throws IOException, InterruptedException {
   String fileName = "pickColor.jar";
   String filePath = System.getProperty("user.dir");
   Runtime.getRuntime().exec(" java -jar " + filePath + "\" + fileName);
}

answered Jan 04 '18 at 09:42

Sasikumar Murugesan

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It's a very good ideea but I need something like filePath+"\\src\\sample" – Andrei Paciurca Jan 04 '18 at 09:59
I am not getting you. you mean you want file path till class path? – Sasikumar Murugesan Jan 04 '18 at 10:01
Yeah! But it's all right , I've moved the jar file to the main project directory – Andrei Paciurca Jan 04 '18 at 10:03

How to execute a .jar file inside project directory in Java?

2 Answers2