Execute Jar from Java code

问题

I have this code that is supposed to run a executable jar, but whenever the code is executed nothing happens?

      try {
           proc = Runtime.getRuntime().exec("java -jar C://X-Dock//MP3Player.jar");
      } catch (IOException e1) {
           e1.printStackTrace();
      }

The JAR works fine if I run it manually, but that line of code just doesn't work. And I know for sure that the code is called.

回答1:

If you has a JRE after version 5, java provides a process builder. So, try something like this:

final ProcessBuilder pBuilder = new ProcessBuilder("/java/path", "-jar", "your_jar.jar");
pBuilder.directory(new File("your/working/directory"));
final Process process = pBuilder.start();

"/java/path" is path for java installation, can be replaced by java, if java is in the environment variables.

See more at ProcessBuilder.

来源：https://stackoverflow.com/questions/27789903/execute-jar-from-java-code