Java综合例题/集合框架第二版 public class Hashtableimplements Cloneable,Serializable{ public synchronized void clear() { Entry,?> tab[] = table ; for(int index = table.length ; --index >=0 ;) tab[index] = null ; count = 0 ; } public synchronized V getfault(K key , V value ) { V value1 = get(key); return (value1==null) ? value : value1 ; } public synchronized boolean isEmpty() { return count==0 ; } public synchronized V getOrDefault(K key , V value ) {



