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                            你可以通過iterator方法從集合獲得一個迭代器,通過while循環和for表達式對集合進行遍歷

~~~
val iterator = List(1, 2, 3, 4, 5).iterator
  while (iterator.hasNext) {
    println(iterator.next())
  }
~~~

或者

~~~
for(e <- iterator) {
    println(e)
  }
~~~


                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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