Runtime.getRuntime().exec(cmd, vars) is not working in Linux

Question

When using

final Map<String, String> env = new HashMap<String, String>(System.getenv());
env.put("ECLIPSE_PROJ_PATH", fileSelectedPath);
final String[] envVars = SystemUtils.mapToStringArray(env);
try {           

Runtime.getRuntime().exec("/usr/bin/gedit",envVars).waitFor();
} catch (InterruptedException e) {
    e.printStackTrace();
}

it doesn't work an gedit doesn't show up and no exceptions occur.

but when removing the env vars and only use the command in exec method like

Runtime.getRuntime().exec("/usr/bin/gedit").waitFor();

it works correctly.

I need to have my env vars set while running my program.. note : this works fine on windows.

Answer 1

I am not sure what SystemUtils.mapToStringArray returns, but it might be easier to use the ProcessBuilder, where environment variables can be provided in a Map.

http://docs.oracle.com/javase/6/docs/api/java/lang/ProcessBuilder.html

http://docs.oracle.com/javase/6/docs/api/java/lang/ProcessBuilder.html#environment()