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I want to create an application which provides GUI using a java swing but in that application i need to use terminal to execute the commands of Linux Ubuntu OS like sudo apt-get update and other.

Is there any method or code which executes my command in terminal but in background when I click on any button (on-click event) in form which is built using java swing?

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You may want to take a look at this question: stackoverflow.com/questions/12716121/… – Burkhard Aug 16 '13 at 10:28
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You can also use ProcessBuilder class I used it one of my projects to execute commands in Linux(Fedora 18) to execute a particular process.

ProcessBuilder pb = new ProcessBuilder("ls");
Process p = pb.start();
p.waitFor();// This will wait untill the execution complets;
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Take a look at ProcessBuilder Java Docs for more details – MadProgrammer Aug 16 '13 at 10:39
    
Also use SwingWorker (or equivalent) to read the IO streams without blocking the EDT. – trashgod Aug 16 '13 at 17:18
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You can use Runtime.exec() methods to run commands. This creates a Process. You can then waitFor for your process to finish, read it's output for command's results, etc ...
Please see javadoc of java.lang.Runtime.exec and java.lang.Process

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