Java Data Type - 如何报价文字符号在数字格式

When formatting a number we can use the single quote ' to
quote a literal symbols.


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);
  }
}