Returns string keys in a hashtable as array of string - Java java.util

Description

Returns string keys in a hashtable as array of string

Demo Code

//package com.java2s;

import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;

public class Main {
    /**//from ww  w .  j  av  a 2  s  .c om
     * Returns string keys in a hashtable as array of string
     *
     * @param ht
     *            , Hashtable
     * @return , string array with hash keys string
     */
    public static synchronized String[] hashtableKeysToArray(Hashtable ht) {
        Vector v = new Vector();
        String[] sa = null;
        int count = 0;

        Enumeration e = ht.keys();
        while (e.hasMoreElements()) {
            String s = (String) e.nextElement();
            v.addElement(s);
            count++;
        }

        sa = new String[count];
        v.copyInto(sa);
        return sa;

    }
}

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