Here you can find the source of newHashtable(int initialCapacity)
public static <K, V> Hashtable<K, V> newHashtable(int initialCapacity)
//package com.java2s; import java.util.*; public class Main { public static <K, V> Hashtable<K, V> newHashtable() { return new Hashtable<K, V>(); }//from w ww .j a va 2s.co m public static <K, V> Hashtable<K, V> newHashtable(int initialCapacity) { return new Hashtable<K, V>(initialCapacity); } public static <K, V> Hashtable<K, V> newHashtable(Map<? extends K, ? extends V> m) { return new Hashtable<K, V>(m); } }