Develop Reference

Runtime.getRuntime() restart mac Java IM

My os is MAC OS 10.11.3.
I using Spark as our IM（Instant messaging），but when the IM log out，IM give an error，said：
java.io.IOException: Cannot run program "open": error=2, No such file or directory .
But when Eclipse runs it， it worked well，and when I wrapped it a mac package and installed it and run it, click "log out" button, it throws errors.
In program, when I log out，I launch a new IM，meanwhile，I killed the old IM application.
Furthermore，in terminal，no matter what I run how many times “open -a Spark”，it just open the same IM，
The source as follows：
public boolean restartApplicationWithScript() {
String command = null;
try {
if (Spark.isMac()) {
command = "open -a " + Default.getString(Default.SHORT_NAME);
}
String commands[] = {"open", "/Applications/Spark.app"};
Runtime.getRuntime().exec(commands);
System.exit(0);
return true;
} catch (IOException e) {
Log.error("Error trying to restart application with script", e);
return false;
}
}

The exception seems to be saying that it cannot find the open command. That seems a bit odd, since it is a standard MacOS command. So I suspect that the reason that it cannot be found is that it is not on the PATH.
Try giving the absolute pathname for the open command. Running which open should tell you what it is.
If open is a shell builtin on MacOS, then you will need to create a subshell to run the command.

Thanks for all， i solved it by 2 step ：
1， cmdline = { "open", "-na", "Microsoft Excel" }; this add a "n" ,otherwise，it will open the same app 。
2，chmod -R 777 youAppPath，if not do this ，the app can't issue the command

How to open TestComplete from java code

I would like to open TestComplete from java, but I can't do that, because lack of privilege. When I run my code
public static void StartTC() {
try{
Process p = Runtime.getRuntime().exec(new String[] {"C:\\Program Files (x86)\\SmartBear\\TestComplete 11\\Bin\\TestComplete.exe"});
}
catch (IOException e) {
e.printStackTrace();
}
}
the program exits with CreateProcess error=740, and tells me that I need higher privilege for this action.
I know that I could make a .lnk with admin priv. at open properties of the exe, but there could be a right way to do this.

I think you can use File class for setting permissions.
File file = new File("File.c");
//but file permission are OS specific.
file.setExecutable(true);
In linux it will work.
If you are using windows then you can run "icacls" command to give permission to the file.
C:\>icacls "D:\test" /grant John:(OI)(CI)F /T
This command can be used to to give permission in windows.
According do MS documentation:
F = Full Control
CI = Container Inherit - This flag indicates that subordinate containers will inherit this ACE.
OI = Object Inherit - This flag indicates that subordinate files will inherit the ACE.
/T = Apply recursively to existing files and sub-folders. (OI and CI only apply to new files and sub-folders). Credit: comment by #AlexSpence.
You can run above command using Runtime.getRuntime().exec("icacls something here");
I hope I helped you.

You need to disable the Tools | Options... | Engines | General | Enable support for testing Windows Store applications option in TestComplete.
Information on how this can affect working with TestComplete from an external application like in your case can be found in the Requirements for Testing Windows Store Applications help topic.

Runtime.getRuntime().exec not launching desired app on Android

I'm trying to open the settings app from inside my sample app.
Code snippet inside onCreate:
Process process;
try {
process = Runtime.getRuntime().exec("am start -a android.intent.action.MAIN -n com.android.settings/.Settings");
process.waitFor();
BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
String s = reader.readLine();
Toast.makeText(this, s, Toast.LENGTH_LONG).show();
}
catch(Exception e) {
e.printStackTrace();
}
When I run this, my app opens, but settings app does not start (neither does any other app I try). The toast inserted for debugging displays "Starting: Intent { act=android.intent.action.MAIN cmp=com.android.settings/.Settings } but it doesn't actually start. Nothing useful visible in logcat either (unless I've missed something in it).
Same command is working using adb (adb shell am start -a android.intent.action.MAIN -n com.android.settings/.Settings)
I'm using Android Studio and an Android 4.4 device if that matters. I've been searching online to figure out what I might be doing wrong, but things seem correct in the above code. Could someone please help?
Update:
Apologies for not giving further details, but Settings is not the app that I finally plan to launch in the actual version of this app, Settings was just a test. It is another app which doesn't have android:exported="true" and takes parameters. To be precise, it opens files of a certain extension which it takes as parameters like "adb shell am start -W -a android.intent.action.VIEW -d ..."

The right way to run another application in Android would be According to this answer
Intent launchIntent = getPackageManager().getLaunchIntentForPackage("com.android.settings");
startActivity(launchIntent);

Why don't you open Settings by Intent? Something like this:
startActivityForResult(new Intent(android.provider.Settings.ACTION_SETTINGS), 0);

pm command giving Segmentation fault

I am trying to update an Apk on Android Remotely. To run the update without the need of user intervention, I am using this post Link .
But the process is returning with the exit code 139 which means Segmentation fault. My tablet is rooted and I have confirmed it.
File file = new File(Constants.UPDATE_APK_PATH);
try {
String[] filenames = file.list();
File apk = new File(file, filenames[0]);
Process pid = Runtime.getRuntime().exec(
new String[] { "su", "-c",
"pm install -r "+apk.getAbsolutePath()});
pid.waitFor();
Can anybody tell what exactly i am doing wrong? The file is present at the location and the signature of both the apk is same.

I'm pretty sure if you use adb install instead of pm install would resolve this issue.
But i believe in this case application does not have enough permissions to install packages.

Java - get PID of external process by command line in Windows 7

I have Windows 7 32 bit with Java:
How do I get the PID of a process by command line in Windows 7?
I want to kill an application which I only can truly identify by the command line which ran it. We have several Java applications running on that machine. I need to stop specific ones.
To be exact: I need to find tomcat which is run by catalina.bat. What do you think is the best way to do this?
I know of tasklist, but it does not seem to be able to query the command line which started the process. Finding java.exe does not help me. I tried searching for something useful like pgrep/pkill for Windows, with no success.

You could use jps -lv command to determine java process by it's command line options. jps is utility that included in many up-to-date JDKs.

Try in a command prompt:
sc queryex type= service state= all | find "APP"
Where APP is the name of the program. This command will return all services that match that.
Then you can run SC QUERYEX APP and it will return the state and PID number.
Once you have the PID:
TASKKILL /f /pid ###
Where ### is the actual PID

Java, get the PID of the current running process in Windows
This should work on Linux, OSX, Windows, and HotSpot JVM's.
import sun.management.VMManagement;
import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
public static int getCurrentPID() {
try{
java.lang.management.RuntimeMXBean runtime =
java.lang.management.ManagementFactory.getRuntimeMXBean();
java.lang.reflect.Field jvm = runtime.getClass().getDeclaredField("jvm");
jvm.setAccessible(true);
sun.management.VMManagement mgmt =
(sun.management.VMManagement) jvm.get(runtime);
java.lang.reflect.Method pid_method =
mgmt.getClass().getDeclaredMethod("getProcessId");
pid_method.setAccessible(true);
return (Integer) pid_method.invoke(mgmt);
}
catch(Exception e){
e.printStackTrace();
System.out.println("Failed at getting the process ID");
System.exit(0);
}
}
Invoke it like this:
System.out.println("PID: " + getCurrentPID());
For me it prints the processID: PID: 5728
Sources:
How can a Java program get its own process ID?
http://boxysystems.com/index.php/java-tip-find-process-id-of-running-java-process/

If you just need to kill a specific tomcat from a java application why not coding a simple servlet running inside each tomcat that will responde to a get request with a string that will identify it. Then use another servlet to execute something like:
System.exit(-1);

Finally found something. The solution working for me is called wmic (Windows Management Instrumentation Commandline). This nice tool comes built-in to Windows 7 Pro (mine) and possibly other Windows versions. It provides a quite large variety of actions like listing all the running tasks with every details you can imagine (like their corresponding command line), various hardware info, etc. Exactly what I need.