I am trying to execute jar files from another Java program. I am using the following code :
try { Runtime runtime = Runtime.getRuntime(); runtime.exec("path upto jar"); } catch (Exception ex) { JOptionPane.showMessageDialog(null, "Exception occured" + ex); } But its not working. I tried google and it gave me the examples using ProcessBuilder, but that is not working either.
Using ProcessBuilder(java.lang.ProcessBuilder) will solve your problem. Syntax is as follows -
ProcessBuilder pb = new ProcessBuilder("java", "-jar", "absolute path upto jar"); Process p = pb.start(); You can redirent input/output/error to/from files as follows
File commands = new File("absolute path to inputs file"); File dirOut = new File("absolute path to outputs file"); File dirErr = new File("absolute path to error file"); dirProcess.redirectInput(commands); dirProcess.redirectOutput(dirOut); dirProcess.redirectError(dirErr); First suggestion/recommendation is to use ProcessBuilder instead of Runtime. Here is what you can try:
ProcessBuilder pb = new ProcessBuilder("java", "-jar", "./jarpath/yourjar.jar"); Process p = pb.start(); BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream())); String s = ""; while((s = in.readLine()) != null){ System.out.println(s); } int status = p.waitFor(); System.out.println("Exited with status: " + status); 
You can run a jar file from where ever you want by using only this one line code.
Desktop.getDesktop().open(new File("D:/FormsDesktop.jar")); where
new File("your path to jar") Hope it helps.
Thanks.
execinclude the necessary[path]/java -jarbits?ProcessBuilder, it handles space in commands/parameters better