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how to destroy a process generated from a process builder in java

I have a processbuilder that runs a .sh script. it opens a terminal. I want to destroy this terminal later. I tried process.destroy() but it did not do the job.
Code:
Process p = new ProcessBuilder("/usr/bin/gnome-terminal", "-e", "/home/omar/ros_ws/./baxter2.sh").start();
try {
Thread.sleep(10000); // wait for one second
} catch (InterruptedException ex) {
Thread.currentThread().interrupt();
}
p.destroy();

try
{
Process[] proc = new Process[2];
proc[0] = new ProcessBuilder("calc.exe").start();
proc[1] = new ProcessBuilder("notepad.exe").start();
try {
Thread.sleep(3000);
} catch (InterruptedException ex) {
}
proc[0].destroy();
proc[1].destroy();
}
catch (IOException ioe)
{
ioe.printStackTrace();
}

How to execute Symlink command in java

I am finding trouble in executing symlink command in java. My source filename and destination filename has space in it.
How to execute this command?
Eg. ln -sf /home/Desktop/image1 .jpg /home/Desktop/Folder/image 2.jpg
I am trying this code
String command = "ln -sf " + "/home/Desktop/\"image 1.jpg\"" + " /home/Desktop/Folder/\"image 2.jpg\"";
CommandLine oCmdLine = CommandLine.parse(command);
DefaultExecutor oDefaultExecutor = new DefaultExecutor();
oDefaultExecutor.setExitValue(0);
try {
oDefaultExecutor.execute(oCmdLine);
} catch (ExecuteException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}

You can do it easy with NIO.2
Path directoryTarget = Paths.get("c:/temp");
Path directoryLink = Paths.get("c:/links/linkTemp");
Files.exists(directoryTarget);
try {
Files.createSymbolicLink(directoryLink, directoryTarget);
} catch (IOException e) {
e.printStackTrace();
}

running cmd commands through java

i am trying to save the logcat of an Android device by executing cmd commands through java,although the file i specify in which the logcat to be saved to is never created.Can anybody tell me why this happens?
the cmd command i want to perform is "adb logcat > C:/Users/user1/Desktop/log1.txt".
and the code I use to execute it is:
try {
// create a new array of 4 strings
String[] cmdArray = new String[4];
cmdArray[0] = "adb";
cmdArray[1] = " logcat";
cmdArray[2] = " >";
cmdArray[3] = " C:/Users/amantsakov/Desktop/logcat.txt";
// create a process and execute cmdArray
Process process = Runtime.getRuntime().exec(cmdArray);
} catch (Exception ex) {
ex.printStackTrace();
}

Hope this will work for you
String[] exeCmd = new String[] { "ffmpeg", "-i", "C:\\test\\Veham.mp3",
"-i", "C:\\test\\test.mp4", "-acodec", "copy", "-vcodec",
"copy", "C:\\test\\outPut.mp4" };
ProcessBuilder pb = new ProcessBuilder(exeCmd);
boolean exeCmdStatus = executeCMD(pb);
return exeCmdStatus;
private static boolean executeCMD(ProcessBuilder pb) {
pb.redirectErrorStream(true);
Process p = null;
try {
p = pb.start();
} catch (Exception ex) {
ex.printStackTrace();
System.out.println("oops");
p.destroy();
return false;
}
// wait until the process is done
try {
p.waitFor();
} catch (InterruptedException e) {
e.printStackTrace();
System.out.println("woopsy");
p.destroy();
return false;
}
return true;
}// End function executeCMD
these method will help to run cmd command from java.

Remove file using Runtime

I tried to use this code to delete a file located into /data folder but it doesn't work, what's wrong in it? My device has root.
Runtime.getRuntime().exec(new String[]{"su","rm"+" "+"/data/logger"});
SOLVED USING THIS
Process p;
try {
p = Runtime.getRuntime().exec("su");
DataOutputStream os = new DataOutputStream(p.getOutputStream());
os.writeBytes("rm /data/logger"+"\n");
os.writeBytes("exit\n");
os.flush();
p.waitFor();
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

Use the -f switch to force the delete.
File exists case is taken care by runtime class.
Try this:
Runtime.getRuntime().exec(new String[]{"su","rm","-f","/data/logger"});
or this
Runtime.getRuntime().exec("su")
Runtime.getRuntime().exec(new String[]{"rm","-f","/data/logger"});

use >nul when execute command by runtime.exec

I am executing a self-defined command like following code.I know that append a >nul to command will prevent from outputing error or other message to console.But in my code,>nul is treated as a parameter of my own command deletefile.So the command can not execute as expected.How to resolve it?
Runtime runtime = Runtime.getRuntime();
try {
Process p = runtime.exec("deletefile /name:\"ABC\" /owner:\"Wolfman\" >nul");
int status = p.waitFor();
System.out.println(status);
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
Solution is:
cmd deletefile /name:\"ABC\" /owner:\"Wolfman\" >nul