This Java tip illustrates a method of executing a command from the code. This is very helpful in cases when developer wants to execute some file (for ex. an exe) or run some command in a command prompt but without the interruption of the user.

 try {
    // Execute a command without arguments
    String command = "ls";
    Process child = Runtime.getRuntime().exec(command);
    // Execute a command with an argument
    command = "ls /tmp";
    child = Runtime.getRuntime().exec(command);
} catch (IOException e) {

// In case developer wants to execute a command with more than 
// one argument, it is necessary to use the overload that requires 
// the command and its arguments to be supplied in an array:

try {
    // Execute a command with an argument that contains a space
    String[] commands = new String[]{"grep", "hello world", "/tmp/f.txt"};
    commands = new String[]{"grep", "hello world", 
            "c:\\Documents and Settings\\f.txt"};
    Process child = Runtime.getRuntime().exec(commands);
} catch (IOException e) {