Method insert

classpath/java/lang/StringBuilder.java:135–166

(int i, String s)

  }

  public StringBuilder insert(int i, String s) {
    if (i < 0 || i > length) {
      throw new IndexOutOfBoundsException();
    }

    if (i == length) {
      append(s);
    } else {
      flush();

      int index = length;
      for (Cell c = chain; c != null; c = c.next) {
        int start = index - c.value.length();
        index = start;
      
        if (i >= start) {
          if (i == start) {
            c.next = new Cell(s, c.next);
          } else {
            String v = c.value;
            c.value = v.substring(i - start, v.length());
            c.next = new Cell(s, new Cell(v.substring(0, i - start), c.next));
          }
          break;
        }
      }

      length += s.length();
    }

    return this;
  }

  public StringBuilder insert(int i, CharSequence s) {
    return insert(i, s.toString());