//Sample06_01.java

class Sample06_01{
    public static void main(String[] args){

      StringBuilder sb = new StringBuilder();
      sb.append("黄瀬涼太\n");
      sb.append("緑間真太郎\n");
      sb.append("青峰大輝\n");
      sb.append("紫原敦\n");
      sb.append("赤司征十郎\n");
      System.out.println(sb.toString());
      System.out.println("-----------");

      String strSub = sb.substring(6, 12);
      System.out.println("substring");
      System.out.println(strSub);
      System.out.println("-----------");

      System.out.println("sbString");
      System.out.println(sb.toString());
      System.out.println("-----------");

    }
}