Java Data Type - 如何以数字格式添加硬编码字符串

import java.text.DecimalFormat;
import java.text.Format;

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

    Format formatter = new DecimalFormat("'abc'#");
    String s = formatter.format(-1234.567);
    System.out.println(s);
  }
}