Method ensureCapacity

classpath/java/util/ArrayDeque.java:49–58

(int newSize)

  }
  
  private void ensureCapacity(int newSize) {
    if (dataArray.length < newSize) {
      Object[] newArray = new Object[dataArray.length * 2];
      copyInto(newArray);
      
      dataArray = newArray;
      startIndex = 0;
      endIndex = size - 1;
    }
  }

  @Override
  public boolean offerFirst(T e) {