launching terminal from application

I have created an application using Netbeans 6.9. In the application I want that when the user clicks on the run button then the terminal(Command Prompt) should open and some text should appear on the terminal. The text is actually a command. I want that the command should be executed on the terminal. Can anyone please help me. I've written the following code....

class test extends Exception{  
    public static void main(String arg[]) {  
        String command = "cmd.exe/start cmd";  
        System.out.println(command);  
        try {  
            Process child = Runtime.getRuntime().exec(command);  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
}

But its giving the following error...

cmd.exe/start cmd

java.io.IOException: Cannot run program "cmd.exe/start": CreateProcess error=2,

The system cannot find the file specified

at java.lang.ProcessBuilder.start(ProcessBuilder.java:1018)

at java.lang.Runtime.exec(Runtime.java:610)

at java.lang.Runtime.exec(Runtime.java:448)

at java.lang.Runtime.exec(Runtime.java:345)

at test.main(test.java:6)

Caused by: java.io.IOException: CreateProcess error=2, The system cannot find th

e file specified

at java.lang.ProcessImpl.create(Native Method)

at java.lang.ProcessImpl.(ProcessImpl开发者_JS百科.java:155)

at java.lang.ProcessImpl.start(ProcessImpl.java:99)

at java.lang.ProcessBuilder.start(ProcessBuilder.java:1010)

... 4 more

Can anyone tell me whats the problem??

-Thanks in advance

Here is a really good tutorial on Runtime and Process in Java, which covers off all the points that you are looking to do.

http://www.java-tips.org/java-se-tips/java.util/from-runtime.exec-to-processbuilder.html

Simply, you want to use Runtime to open the command window, and the Process to read and write to the output stream of that process.

The error is in your command.. "cmd.exe/start cmd"

Process prr = rt.exec("cmd /c "+i); in this case the command you want to execute is in (String i)