java.util.NoSuchElementException:Hashtable Enumerator 解決辦法

程式中用了兩次的 iterator.next:

@Test
    public void test() {
        Iterator iterator = System.getProperties().keySet().iterator();
        while(iterator.hasNext()){
            Logger.print(iterator.next() + "=" + properties.getProperty(iterator.next().toString()));
        }
        
    }
           

@Test
    public void test() {
        Iterator iterator = System.getProperties().keySet().iterator();
        while(iterator.hasNext()){
            String key = iterator.next().toString();
            Logger.print(key + "=" + properties.getProperty(key));
        }
        
    }