hi friend try this code may this helpful for you.

public class CommandLineInput
{
public static String newline = System.getProperty("line.separator");
    public static void main(String args[])
      {          
          if(args.length <= 0)
            {
                System.out.println("Enter 100 words");                
            }
          else if(args.length < 100)
            {
                System.out.println("Enter at least 100 words");
            }
           else
            {
                 for(int i=0; i < args.length; i++)
                    {                          
                int r = i%20;            
                          if(r == 0)
                            {
           String str = args[i];
           System.out.print(args[i]+newline);
                                /*String[] tokens = str.split(" ");
                                for(int k=0; k<tokens.length; k++)
                                  {
                                     System.out.println(tokens[k]);
                                  }
            */
                            }
                else
                            {
                                  System.out.print(args[i]);
        }                   

                    }
    }// else closed

      }// main closed
}// class closed