class InputDemo
{
  public static void main ( String[] args )
  {
    int sum = 0;
    for (int j=0; j  < args.length; j++ )
      sum += Integer.parseInt(  args[j]  );

    System.out.println( "Sum: " + sum );
  }
}

Arguments with Spaces

A command line argument that contains spaces is surrounded by quotes:

C:\>java SomeProgram "one argument" "another argument"

The Java system creates an array of String references if there are any on the command line. But the program is free to ignore them.