Method toString

lib/java/util/AbstractCollection.java:373–395

Returns the string representation of this Collection. The presentation has a specific format. It is enclosed by square brackets ("[]"). Elements are separated by ', ' (comma and space). @return the string representation of this Collection.

()

     * @return the string representation of this {@code Collection}.
     */
    @Override
    public String toString() {
        if (isEmpty()) {
            return "[]"; //$NON-NLS-1$
        }

        StringBuilder buffer = new StringBuilder(size() * 16);
        buffer.append('[');
        Iterator<?> it = iterator();
        while (it.hasNext()) {
            Object next = it.next();
            if (next != this) {
                buffer.append(next);
            } else {
                buffer.append("(this Collection)"); //$NON-NLS-1$
            }
            if (it.hasNext()) {
                buffer.append(", "); //$NON-NLS-1$
            }
        }
        buffer.append(']');
        return buffer.toString();
    }
}