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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 and up. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.util;

/**
 * An interface defining a list of strings.
 */
public interface StringList
    extends Iterable
{
    /**
     * Add a String to the list.
     *
     * @param s the String to add.
     * @return true
     */
    boolean add(String s);

    /**
     * Get the string at index index.
     *
     * @param index the index position of the String of interest.
     * @return the String at position index.
     */
    String get(int index);

    int size();

    /**
     * Return the contents of the list as an array.
     *
     * @return an array of String.
     */
    String[] toStringArray();

    /**
     * Return a section of the contents of the list. If the list is too short the array is filled with nulls.
     *
     * @param from the initial index of the range to be copied, inclusive
     * @param to the final index of the range to be copied, exclusive.
     * @return an array of length to - from
     */
    String[] toStringArray(int from, int to);
}