Use ' symbol to quote literal symbols in Java

//from   w  w  w . j  a  v a2s  .c o  m
import java.text.DecimalFormat;
import java.text.NumberFormat;

public class Main {
  public static void main(String[] argv) throws Exception {

    NumberFormat formatter = new DecimalFormat("'#'#");

    String s = formatter.format(-1234.567); 

    System.out.println(s);
  }
}